Note: Descriptions are shown in the official language in which they were submitted.
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SPECIFICATION
TIThE OF INVENTION
TONER CARTRIDGE AND OPENING AND CLOSING MECHANISM
FOR PASS-THROUGH OF SAME
Technical Field
The present invention relater to a toner cartridge for supplying powder or
liquid toner (including painting ink) to the developing device such as a
copying
machine, printer, or printing machine, and the opening and closing mechanism
for pass-through of same.
Background Art
Powder or liquid toner as an electrophotographic developer for use in the
copying machine, printer, or printing machine is generally contained in a
toner
cartridge for further supply of same to the device such as the copier. The
toner is
transferred from the toner cartridge into the toner. reservoir of the copier.
A
structure has been used i:or this purpose such that a seal is affixed to the
toner
outlet, and the seal is removed vvhen the toner is supplied. However, with
said
structure, once the seal has been peeled off, the outlet can not be closed
again.
Toner cartridges have been proposed wherein the toner outlet is provided
with a valve body whicb~ is biased by a spring in. a direction of its blocking
passage (Japanese Patent Applications laid open Nos.60-80878, 7-44005, and 8-
137229). With these devices, however, it is necessary to mount a spring in the
toner container. This renders the structure complex, and if the toner
cartridge is
subjected to a great vibration during transportation, there is a risk of the
spring
coming loose to such an e:~ctent that a trace of toner may leak out.
Said Japanese Patent Application laid open No.7-44005 disclosed a toner
cartridge wherein the toner outlet is put in a closed position by fitting a
valve
body in the outlet prior to use of toner, and the toner outlet is opened by
pushing
up the valve body to open it when the toner is used. However, once the outlet
has been opened, the fitting position can not be retraced. Therefore, the
outlet
can not be closed completE~ly durW g the operation. In this connection, in
case the
:form is taken of supplying; toner from the toner cartridge in sequence
dependent
on the amount of toners consumed, there may incur a risk of toner leaking
little
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by little from the outlE~t with no valve fitted therein. The Japanese Patent
Application laid open No.7-440C15 proposed an arrangement such that the closed
position of the outlet b~y the valve may be retained by magnetic force. The
necessity of mounting am additional member such as a magnet will unavoidably
involve extra production cost.
In the past have been used goner containers chiefly made of hard synthetic
resins which may remain unchanged in volume irrespective of the consumption
of toners. However, in case toners are supplied in sequence from the toner
cartridge in accordance with the toner consumption, a certain amount of toner
may be left over within the toner container for a long period of time. In that
case,
the toner is apt to deteriorate because the toner remains exposed to the air
inside the toner container for a long time.
Disclosure of Invention
In this view, the present invention provides for its object a toner cartridge
which may surely and ea~.sily opE~n and close the toner pass-through.
Another object of the present invention is to provide a toner cartridge which
may prevent deterioration of toner in the toner container for a long period of
time even if the form is taken of supplying toners in sequence from the toner
cartridge according to the amount of toners used up.
Further object of the present invention is to provide a toner cartridge which
may surely and easily open and close the pass-through, and in particular, is
suitable for a supply system in which each toner loss may only be compensated
for by replenishment of f-.resh toners.
Further object of the X>resent invention is to provide an opening and closing
mechanism of the pass-through in the toner cartridge, which is of a relatively
simple structure but may readily open and close the pass - through, and
securely maintain the closed position once the pass-through has been closed.
In order to solve the above-mentioned technical tasks, the present invention
provides the following mE~ans.
A first invention of the prE~sent application provides a toner cartridge
comprising a toner container containing of powder or liquid toners for use in
developing device, and a connecting member for supplying the toners from said
toner container to the dEwelopin.g device, characterized in that the
connecting
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member includes a pass-through and a valve body for opening the pass-through
provided in the connecti~zg member when a valve body operating member of the
developing device is at vc~ork, and closing the pass-through when the valve
body
operating member is at rest, axed that the toners may be discharged from the
opened pass-through.
The connecting member so called here functions as a toner discharging
member and its pass-tl:~rough serves as a toner outlet when the toners are
discharged from the toner cartridge, while the connecting member functions as
a toner filling member a:nd its pass-through serves as a toner fill opening
when
the toner cartridge is :filled with the toners (this applies to the following
inventions).
A second invention of the preaent application provides the toner cartridge in
accordance with the first; invention, characterized in that the toner
container is
provided with a shxznkable portion of shrinking according to the loss of
toners in
the toner container.
In the first and second inventions of the present application, when a toner
supply is needed in the developing device such as copiers, the valve body
operating member of the developing device is operative to open the outlet to
supply toner. As soon as the supply of a desired quantity of toner is
finished, the
valve body operating member of the developing device is put in a non-operative
position, and the pass-through is closed by the valve body, thereby to head
off
any possible leakage of toner from the pass-through. The valve body operating
member may be arranged such that it may actuate the valve, moving to or away
from the valve body, or it is put in the operating or nonoperating position by
the
cartridge moving to or away from the valve body operating member while the
valve body operating member itself is stationary in a location. The actuation
of
the valve by the valve body open.~ating member may be automatically achieved,
and the switchover of the opera.tang position to the nonoperating position and
vice versa may be manually carried out.
With the second invention of the present application, since the toner
container is provided with a shrinkable portion of shrinking according to the
toner loss, the internal volume of the toner container is decreased as the
toner is
discharged. This may place a check on entry of air into the toner container,
and
thus, even if the tone:r supply is kept suspended for a long time, any
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deterioration of toners in. the toner container can be prevented.
A third invention of the present application provides a toner cartridge in
accordance with the second invention, characterized in that the toner
container
may be filled with toner by pouring toner through the connecting member when
the shrinkable portion of the toner container is in the shrink position, and
that
the valve body has a main fitting portion of closing the pass-through by
fitting
into the pass-through, and a connecting portion of connecting with the valve
body operating member so that when the valve body operating member of the
developing device relatively :proceeds to an undischarged position, the
connecting portion displaces together with the valve body operating member
while the former is held in connection with the valve body operating member,
whereby the main fitting portion is fitted with the pass-through.
In the third invention of the present application., since the toner container
is
filled W th toner by injecting toners through the outlet when the shrinkable
portion of the toner container is iin the shrink position, toners can be put
into the
toner container which does not almost contain air. Referring to a bag made of
resilient synthetic resin ;end call.ed pouch, it may be filled with some
content by
injecting the latter through a location other than the outlet before it is
sealed by
hot welding. Specifically, filled contents are probably involved in hot welded
zones. For example, if the filled contents are liquid or fine particles and
its
quantity is thick on the ground, said contents may reach the welded zones. In
particular, in case of the fine particles, floating powders may be involved in
the
welded zones. Then, a su~cient welding can not be performed. Particularly, in
case the toner is of a liquid type, if hot welding is carried out with the
liquid
involved, the liquid expands according to the change of temperature so that
there is a high possibility of a :~u~cient hot welding being unobtainable.
This
necessitates the provision of a sizable gap between the filled contents and
the
hot welded zone of a synthetic resin pouch. As a result of it, a space
necessary
for the performance of thermal welding must be provided, which makes it
difficult to completely fill the entire container with the content, thereby
resulting in a sealing with air-packed space. Contrary to this, this invention
can
almost fully fill the container with toners because the toner container may be
filled with toners in a condition where little air occurs in the container.
Therefore, a long-term preservation of toner could never cause any change of
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properties to the toner. Moreover, since the filling takes place when the air
rarely remains within the container thanks to the complete shrinkage of the
shrinkable portion of the toner container, it is unnecessary to eliminate air
from
or introduce air into the contai~aer at the filling time. This enables speedup
of
the filling operation.
Additionally, in the third invention of the present application, the valve
body
has a main fitting section of closing the pass-through by fitting with the
pass
-through, and a connecl;ing portion of connecting with the valve body
operating
member so that when the valve body operating member of the developing device
relatively proceeds to an undischarged position, the connecting portion
displaces together with a valve body operating member while the former is
held in connection with the valve body operating member, whereby the main
fitting member is fitted into the pass - through. Consequently, the pass -
through is strongly sealed by the fitting between the main fitting member of
the
valve body and the pass -through (in particular, by a forced fitting operation
which is performed by dE~formin~; the constituent materials of at least one of
the
both members to be fittE~d to each other). Said forced fitting operation may
be
completed not by a spring but. by moving the valve body by means of the
connection of the connecting portion of the valve body and the valve body
operating member.
Thus, the connection of the connecting portion and the valve body operating
member may preferably providE~ a connection of the valve body and the valve
body operating member which rnay be performed by fitting of the main fitting
portion into the pass-through, especially, with a strength which can
constitute a
forced fitting. The examples of specific means to achieve such a purpose are
the
forced fitting of the connecting ;portion and the valve body operating member,
the provision of a receiving hole on one of the members and a projection on
the
other one, or the connection of the both members by screws and magnetic force.
In the first, second and third inventions of the present application, a direct
connection of the pass -- through and the storing section such as the toner
reservoir at the developW g devic'e's side through a peripherally closed
discharge
pathway in the form o:E' a cylinder is advantageous in that toners can be
prevented from scattering in the device and that toners can be introduced into
the storing section such as the toner reservoir at the developing device's
side to
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the exclusion of the air from outside. As an example of concrete means for
achieving the purpose may be illustrated a valve body operating member at the
developing device's side which is in the shape of a hollow cylinder so as to
also
serve as a discharge pathway so that when the valve body is in an open
position,
the hollow cylindrical valve body operating member may communicate with the
toner container. Alternatively, if the valve body operating member does not
function as a discharge pathway, the peripherally closed discharge pathway
such as a cylinder may be put to or fitted into the pass-through.
The fourth invention of the present application provides a toner cartridge as
defined in the described. inventions characterized in that the toner container
includes a second connecting member other than said connecting member, and
that the second connecti~ag member may selectively conduct circulation of
fresh
air so as to adjust the pressure inside the toner container.
When the toner container is idled with toners or toner are discharged from
the container, the fourth invention makes it possible to make adjustment of
the
air within the container to ensure that a smooth filling or discharging of
toners
will take place.
A fifth invention of the present application provides a toner cartridge as
defined in the described inventions characterized in that the toner container
receives toners injected from the connecting member until the toner container
is
filled with the toners, and then, the discharge of the air within the toner
container may be executed by an air discharge means of discharging the air
from the container without allov~ring an outflow of the toner.
In this fifth invention., the discharge of the air within the container can be
also made after toners have filled the container in, whereby adjustment of the
pressure within the container and prevention of deterioration of the toners
can
be effectively achieved.
A sixth invention of th.e present application prow des an opening and closing
mechanism for the pass--through of the toner cartridge, characterized in that
a
connecting member of the toner cartridge for supplying powder or liquid toner
for developing device from the toner cartridge comprises a main body provided
with a pass-through, a valve body for opening and closing the pass-through,
moving to or away from the pass-through, a fixing means for fixing the valve
body to ensure that the valve body holds the outlet in the closed position,
and a
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valve body operating member for moving the valve body between the opened
and closed positions by c:ontact with the valve body.
With the sixth invention of the present application, when the supply of toner
is needed in the developing device such as copiers, the connecting member is
opened by the action of the valve body operating member for supply of toner.
If a
desired supply of toner is finished, the valve body operating member is put in
a
nonoperating position so that the connecting member is closed by the valve
body,
thereby preventing any leakage of toner from the connecting member. The valve
body operating member may be arranged such that it may actuate the valve,
moving to or away from the valve body, or it is put in the operating or
nonoperating position b;y the cartridge moving to or away from the valve body
operating member while the valve body operating member itself is stationary in
a location. The actuation of the valve by the valve body operating member may
be automatically achieved, and the switchover of the operating position to the
nonoperating position and vice versa may be manually carried out. The valve
body operating member may be~ separate from or integral with the valve body.
The toner container ma;y be provided with the shrinkable portion of shrinking
according to the loss of toners within the toner container, but it may be of a
deformable type which is made from hard resin. However, a toner container
with the shrinkable portion decreases its internal volume as toners are
discharged. This may aidvantageously avoid any entry of air into the toner
container, and prevent any deterioration of the toner even if the supply of
toner
remains suspended for a long period of time.
A seventh invention of the present application provides an opening and
closing mechanism for tlhe pass-through of the toner cartridge characterized
in
that the connecting member of the toner cartridge for supplying powder or
liquid toners for developing device from the toner. cartridge comprises a body
including a pass-through, a valve body for opening and closing the pass-
through
by moving to or away fi~om the pass-through, a retaining means for retaining
the valve body in a position to render the pass-through closed, and a valve
actuating member formed integral with the valve body for moving the valve
body between opened and closed positions, said valve actuating member being
provided to stretch over the areas in and about the pass-through, and that the
valve body operating member a~°ranged outside the pass-through puts the
valve
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actuating member in motion so as to move the valve body between opened and
closed position.
With the seventh invention, t;he valve body and the valve actuating member
for actuating the valve body area formed integral with each other, and the
valve
body operating member :is designed to operate the valve actuating member.
A eighth invention of the present application provides the opening and closing
mechanism for the pass-through of the toner cartridge as defined in any of the
sixth and seventh inventions, characterized in that the valve body operating
member is provided in tlhe developing device, the valve body operating member
acts to put the valve body in an .opened position only when the developing
device
is in need of supply of tapers, and the valve body operating member acts to
put
the valve body in a closed position when the supply of toners comes to end.
The eighth invention makes it possible to completely prevent the air from
flowing into the toner container by means of an arrangement such that the
valve body is opened onl;;~ when the developing device needs the supply of
toners,
and closed when the supply of toners is over.
A ninth invention of tile presE~nt application provides the opening and
closing
mechanism for pass-the°ough as defined in said sixth to eighth
inventions,
characterized in that a v~rorking member for moving the connecting member and
the valve body operating member relatively to and/or away from each other is
provided in the developing device by displacing at least one of the connecting
member and the valve body operating member for manual or automatic control
of said working member..
The working member of the ninth invention causes more simple coupling and
non-coupling of the connecting naember of the toner cartridge and the valve
body
operating member at thE~ side of developing device.
The toner cartridge in accordance with the respective inventions of the
present application implies a cartridge for supplying powder or liquid toner
(including printing ink) to various kinds of developing/printing devices such
as
the copier, printer (la;ser printer, inkjet printer), and printing machines
(hereinafter referred to as the developing device) The developing/printing
devices include a system in which a reservoir is provided of storing toners
which
have been supplied from the cartridge, and a system in which there is not
provided a reservoir, but the toner cartridge functions as a toner reservoir
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instead, too. The present invention is applicable to any system.
The first and second :inventions of the present application provide a toner
cartridge wherein the outlet can be surely and readily opened and closed, and
in
particular, as the quantity of toner corresponding to that of toners used up
in
the developing device ma.y only be supplied from the toner cartridge in
sequence,
and additionally, the tourer discharge pathway may be used as a toner filling
pathway, whereby the toner filling operation can be surely and easily carried
out. Moreover, toners may be supplied to the storing section such as a toner
reservoir of the copier etc., by establishing a direct connection of the
latter with
the outlet, thereby preventing the toner from scattering within the system as
well as the entry of air into the system when the toner filling takes place so
that
toners maintaining its high quality may be supplied.
In accordance with the second invention of the present application, in
addition to the above-described effect, since the shrinkable portion of the
toner
container is adapted to shrink according to the loss of toner, no space will
be
formed in any place of th~~ toner container, thereby affording protection of
toners
against contact with air so that any deterioration of toners within the toner
container can be arrested for a long period of time.
With the third invention of the present application, in addition to the
effects
of the first and second inventia~ns, the valve body can be surely fitted to
the
outlet only by a simple motion of the valve body operating member of the
developing device rather than biased by a spring to ensure that the outlet
will
be made airtight by a simple structure and operation. Additionally, the toner
container can be almost completely filled with tapers by pouring the toners
through the discharge member with the shrink mE~mber of the toner container
kept in the shrink position, so that the toner may be preserved without any
quality change for a long time amd the filling operation can be conducted with
higher speed.
In the fourth and fifth inventions, adjustment of pressures inside the toner
cartridge can be made, and deterioration of toners can be avoided by
discharging the air from the container.
The sixth invention of the present application provided the opening and
closing mechanism for tlhe connecting member of the toner cartridge wherein
the connecting member can be easily opened and closed by a relatively simple
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structure, and once the connecaing member has been closed, such a closed
condition can be securely maintaned.
In the seventh inventiion of the present application, the valve body and the
valve body operating member of operating the valve body are formed integral
with each other, and the valve body operating member is adapted to impel the
valve actuating member to action.
In the eighth invention of the present application, the valve body is opened
only when the developing device needs the supply of toners, and closed when
the
supply is over, so that the entry of air into the toner container can be fully
prevented. In the ninth invention of the present application, the working
member provided in the developing device may cause more simple coupling and
non-coupling of the connecting member of the toner cartridge and the valve
body
operating member of the developing device.
BriE~f Description of Drawings
Fig.1 is a front view of a toner cartridge in accordance with one mode of
practice of the present in.vention.,
Fig.2 (A) is a plan view of a discharge member of said cartridge, fig.2(B) is
a
longitudinal section view of the discharge member, and fig.2(C) is a sectional
view of a valve body operating member of the device such as copiers,
Figs.3(A), (B),and (C) are sectional views showing toner discharge procedure
steps in said cartridge,
Figs.4(A) and (B) are views explanatory of the internal structures of toner
cartridges in accordance with ar.~other mode of practice of the present
invention,
Fig.5 is a perspective view of the discharge member of a toner cartridge in
accordance with further mode of practice of the present invention,
Fig.6 is a sectional view of the discharge member of a toner cartridge in
accordance with another mode of practice of the present invention,
Fig.7 is a sectional view of the discharge member of a toner cartridge in
accordance with further mode of practice of the present invention, (A) showing
a
closed position, and (B) ~m opened position,
Figs.B(A), 8(B), 9(A), 9(B), and 9(C) are sectional views explanatory of the
courses for the operations of the valve body;
Fig.10 is a semi sectional view of the discharge member of a toner cartridge
in
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accordance with further mode of practice of the present invention,
Fig.l l is a perspective view of the discharge member of a toner cartridge in
accordance with further mode of practice of the present invention, and
Fig. l2 is a perspective view ~of a toner cartridge in accordance with further
mode of practice of the present invention.
Fig. l3 is a plan view of the toner cartridge in accordance with another
embodiment of the present invention;
Fig. l4 is a view explanatory of part of a slide lever serving as a working
member in accordance with the embodiment of the present invention;
Fig.l5 is a view showing part of the slide lever serving as working member in
accordance with the embodime~at of the present invention, and explaining the
state in which it is at work;
Fig. l6 is a plan view of the slide lever in accordance with the embodiment of
the present invention;
Fig.l7 is a front view of the slide lever in accordance with the embodiment of
the present invention;
Fig. l8 is a side view of the slide lever in accordance with the embodiment of
the present invention; arid
Fig. l9 is a view exp:~anator~;~ of the working member in accordance with
further embodiment of the present invention.
Best Mode for Carrying Out the Invention
Now, the best mode for cax~ryiing out the present; invention will be
illustrated
together with the accompanying; drawings.
First, a toner cartridge in accordance with a first mode of practice will be
described with reference to figs.l to 3.
This specific toner cartridge comprises a toner container 1 containing powder
or liquid toner for use in developing devices, and a discharge member 2 for
supplying for supplement the toner from said toner container to the developing
device.
In this mode of practice, the entire toner container 1 is a shrinkable member
of shrinking according to the amount of toner reduced in the toner container.
Specifically, the toner c.ontaine~r as a whole is constituted by a resilient
bag
called "pouch". The bag is made of synthetic resin film. The film may be of a
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single layer, or a composite film composed of several kinds of films built up
in
layers. Alternatively, the bag may be a paper bag or cloth bag having resin
film
layers formed thereins:ide, or the so-called bag-in-box such as a paper box
contained in a container which is more rigid than the film.
The discharge member 2 is located in a proper position in the toner container
1. Referring to Fig.l, since they toner container 1 is a pouch which has been
heat-sealed all therearound, the discharge member 2 is provided in the middle
of a heat-sealed portion 11, but it may be disposed in a corner portion 12 or
the
central portion 13 of the bag.
The discharge member 2 comprises a base portion 21 securely fixed to the
container 1 by a proper fixing :means such as welding or bonding, and a valve
body 3 arranged such that it may move to or away from the base portion. The
base portion 21 is formed with a guide passage 22 communicating with the
interior and exterior of the toner container 1. The guide passage 22 is
provided
with an outlet 23 which is closed by said valve body 3. In this example, the
valve
body 3 is placed in the inner side relative to the outlet 23 (inward of the
toner
container 1).
The valve body 3 has ;~ main fitting member 31 formed on the outer periphery
thereof for closing the outlet :L3 by fitting in the outlet 23. That is, in
this
example, the valve body 3 represents the main fitting member on its outer
periphery, and the entire outlet 23 is a main receiving member. There is
provided in the middle portion of the valve body 3 a connecting portion 32 of
forcibly fitting onto a v~~lve body operating member 4 of the developing
device
such as copiers. More specifically, a distal end 41 of the valve body
operating
member 4 is a sub fitting portion, and the connecting portion 32 of receiving
the
distal end 41 of the valve body operating member 4 is a sub receiving portion.
Said forced fitting is realized by deformation of at least one of the sub
receiving
portion 32 and the sub litt;ing portion 41. Particularly herein, the distal
end 41
of the valve body operating member 4 includes a narrow part 41a into which
may fit a ridge 33a formed inside the connecting portion 32.
The valve body 3 ma3~ be separate from the base portion 21 of the discharge
member 2, but in this example, it is formed integral with the latter so as to
be
guided by a guide porti~~n 5. Tlsis guide portion 5 is composed of struts 51,
51
provided on the base p~~rtion 2;1 and arm portions 52, 52 extending from the
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struts 51 inward. In thi:~ example, the struts 51 and arm portions 52 are
formed
on either side of the base portion respectively, but they may be one, or three
or
more. The arm portion .52 is pivotable at its base end relative to the strut
51,
while it is pivotable at its distal end relative to the valve body 3. In this
example,
as shown in fig.2, when the valve body 3 is in the connection with the outlet
23,
the distal end of the arm portion 52 is positioned below the base end, but as
shown in fig.3(C), when the outlet 23 is out of contact with the valve body 3,
and
thus in the opened position, the distal end of the arm portion 52 is above the
base end.
Furthermore, in this example, the struts 51, 51 extend beyond the arm
portions 52 and furthE~r upw;~rd, and a stopper 53 is laid between both
extensions of the struts 51, 51 on the level above the arm portions 52. If the
valve body 3 has come t;o an elevated position, the stopper 53 abuts the valve
body 3 to prevent the valve body 3 from going further upward. Other means to
check further rise may be used. Therefore, this stopper 53 is not always
essential.
Next, the valve body operating member 4 in the developing device will be
described. Whenever a sensor detects the amount of developer in the developing
device or of ink in the toner reservoir of a hopper, which has been used for a
piece of paper, the valve body operating member 4 starts up so that toners
will
be discharged from the partridge. Also, every time a predetermined amount of
toner used is caught by a sensor, the valve body operating member 4 is put in
motion to allow discharge of toners from the cartridge for further supply of
the
amount of toners corre:~ponding to the amount of toners used up within the
reservoir of the hopper. In this example, the valve body operating member 4 is
actuated to approach the valve body 3 when the discharge of toner is needed,
while it is separated from the valve body 3 and thus in the rest position when
there is no need for toner to be dLischarged.
The valve body operating member 4 may be used as a separate one from a
toner discharge pathwa;~, but in this example, it also has the function of the
toner discharge pathway.
Specifically, the valve body operating member 4 takes the shape of a shaft, so
as to be received by the guide passage 22 of the discharge member 2, having a
toner discharge pathway 42 formed thereinside and an opening portion 43
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extending from the toner discharge pathway 42 to the outside and provided near
the distal end of the valve body operating member 4. The distal end 41 of the
valve operating member 4 is, as aforementioned, received by the connecting
portion 32, and includes narrow part 41a which is adapted to fit onto the
ridge
33a of the connecting portion 32. The opening portion 43 is formed on the base
end side of the narrow ~~art 41a. So to speak, the opening portion 43 makes it
possible to allow the tonE~r container to communicate with the inside and
outside
thereof when the main fitting portion 31 is out of contact with the outlet 23
(in
an opened position). In this example, in the opened position, the opening
portion
43 is positioned inward of the outlet 23 (the inner side of the toner
container).
There is provided sealing means such as an O-ring 44 in a proper position of
the outer periphery of the shaft of the valve body operating member 4 at the
base end side of the opening portion 23. A seal is formed by said sealing
means
between the valve body operating member 4 and the guide passage 22 of the
discharge member 2. This sealing means is not always necessary, but the
sealing means may completely avoid any leakage of toners which fell short of
the discharge pathway 42 from l;he opening portion 43.
Next, the supply method for toner by means of the toner cartridge will be
explained. First, the cartridge as shown in fig.l is placed in position in the
developing device. At this initiall stage, the valve body operating member 4
and
the discharge member 2 stand separated from each other, or as shown in
figs.3(A) and (B), the valve body operating member 4 and the discharge member
2 are in close connection with each other, and the toner outlet 23 is kept in
a
closed position by the valve body 3. In other words, the outlet 23 and the
main
fitting portion 31 are in a fitting relation with each other. In particular,
it is
preferable that such a f.tting relation provide a farced fitting where the
main
fitting portion 31 is so :Forcibly fitted into the outlet 23 that the outlet
23 is
deformed so as to expamd the diameter of thereof. Said forced fitting may be
effected by elastic deformation of the outlet 23. Deformation of at least one
of
the outlet 23 and the main fitting portion 31 will suffice.
In the supply of toner, the valve body operating member 4 approaches the
valve body 3, and further goes upward until the outlet 23 is disconnected from
the main fitting portion 31 (figs..3(B) to (C)). In this example, the
disconnection
between the outlet 23 and the m;~in fitting portion 31 immediately gives rise
to a
14
CA 02300202 2000-02-08
connection between the .connecting portion 32 of the valve body 3 and the
distal
end 41 of the valve body operating member 4. This resultant fitiang is
necessary
for the closing operation of the valve body 3 but not for the opening
operalaon of
same.
If the valve body opera~tang member 4 further thrusts up the valve body 3, the
arm portion 52 ascends with the result that such an elevated position may be
retained. In this state, tike valve body 3 is apart from the outlet 23 and
thus in
the opened position, an~3 the opening portion 43 of the valve body operating
member 4 is located in an inward position relative to the outlet 23 so that
toner
in the container is ready to be discharged through the toner discharge pathway
42 to the outside.
In this example, because the discharge member 2 is provided at the lower
portion of the toner container 1, and arranged such that it may proceed to an
opened position by elevating the valve body member 4, the toner will fall by
gravity from the opening portion 43 of the valve body operating member 4, past
the discharge pathway 4:~, and t~o the toner reservoir such as hoppers.
However,
it is possible to dischargE~ toners by applying pressure to the toner
container. In
that case, it is also possible to provide the discharge member 2 on the upper
portion or lateral side of l;he toner container 1. In any case, the toner
container 1
may be deformed according to the amount of toner contained thereinside so as
to
maintain itself airtight.
Particularly, in this example, as the valve body operating member 4 has the
function of toner discharge pathway, too, it may supply toner without
introducing air from outside during the discharge of toner.
When the supply of ~~ desired quantity of toner is over, the valve body
operalang member 4 retreats to proceed to the state as shown in fig.2,
fig.3(A), or
fig.3(B). That is, the valve body e~perating member 4 goes back together with
the
valve body 3 on the ground that the valve body operating member 4 is designed
to join the connecting portion 32 of the valve body 3 when such a retreatment
takes place. Then is reached the position in fig.3(B)., namely where the
outlet 23
and the main fitting portion 31 have come in contact with each other, thereby
resulting in the toner discharge being stopped. The strength of a fitiang
connection between the distal end 41 of the valve body operating member 4 and
the connecting portion 32 (sub receiving portion 32) is higher than the force
CA 02300202 2000-02-08
required for fitting the main fitting portion 31 into the outlet 23 (main
receiving
portion 23), and thus, a forced fitting connection may be established between
the outlet 23 and the main fitting portion 31 in case the valve body operating
member 4 is brought into connection with the connecting portion 32 of the
valve
body 3.
If the valve body operating member 4 is further retreated, the connection
between the valve body operating member 4 and the connecting portion 32 of
the valve body 3 is dissolved as ~~hown in fig.3(A), and as shown in fig.2,
the both
members 3 and 4 proceeds to a separate position. In any position, a fitted
connection between the main fitting portion 31 of the valve body 3 and the
outlet 23 may established by retreatment of the valve body operating member 4
with the connecting portion 32 of the valve body 3 coupled therewith. This
connection may ensure the prevention of toner leakage, and besides, since the
discharge member 2 can. be molded integrally from resin, the production cost
may be cheapened. Moreover, .a simple operation such as advancement and
retreatment of the valw~ body operating member 4 may enable discharge of
toner and prevent any leakage o:E' toner.
In the above examplE~, when. the valve body operating member 4 of the
developing device proceeds relatively to a discharge position, the connection
between the main fitting portian 31 and the outlet 23 is dissolved with the
connecting portion 32 aril the valve body operating member 4 kept in the
fitting
connection with each other. The fitting connection between the connecting
portion 32 and the valve body operating member 4 does not completely need to
be executed in this stage but in the next stage when the valve body operating
member 4 of the developing device proceeds relatively to non-discharge
position.
Also, in the above example, the connection between the connecting portion 32
and the valve body operating member 4 is designed to be removed at the time
when the main fitting portion 31 has been fitted into the outlet 23, but the
connection between said both members is preferably maintained. That is, once
the connecting portion 31 has been connected with the valve body operating
member 4 when the cartridge is mounted in the developing device, in every
toner supply operation, the valve body 3 may be opened or closed with such a
connection retained, and it is preferable that said connection between the
connecting portion 32 an~3 the v~clve body operating member 4 be broken when
16
CA 02300202 2000-02-08
the cartridge is removed from the developing device.
Fig.4 illustrates a variation of the toner container. In the previous mode of
practice, the entire toner container is shrinkable dependent on the amount of
toners consumed within the tonE~r container. In the example as shown by fig.4,
a
larger half of the container constitutes a shrinkable portion 102.
Specifically,
the toner container 101 comprises shrinkable said portion 102 and a
nonshrinkable portion 103 haviing a discharge member 2. The nonshrinkable
portion 103 , which is made of soft resin, is rigid against collapse under the
atmospheric pressure, while the shrinkable portion is made of soft resin and
resilient enough to deform under the atmospheric pressure. The shrinkable
portion 102 is resilient i;o such a degree that it may stick to the inside of
the
nonshrinkable portion 103, whereby the shrinkable portion 102 shrinks
according to the amount; of a toner used up thereinside and W thout allowing
entry of air until the s~~rinkabl.e portion 102 is finally put in touch with
the
nonshrinkable portion 1(13 (no internal space exists).
A toner container 111 as shown in fig.4(B) has a nonshrinkable portion 112
formed by a cylinder having a fixed internal configuration. A shrinkable
portion
113 is fitted in the nonshrinkable portion 112 so that it is slidable relative
to the
nonshrinkable portion 1.12. The toner container 111 tends to shrink in its
internal volume by the shrinkable portion 113 sliding axially. A discharge
member 2 is provided in the nonshrinkable portion 112.
In any of the both examples in figs.4(A) and (B), the contour of the toner
container may be formed by nonshrinkable members 104, 114. In fig.4(A), the
nonshrinkable member 104 is disposed outside of the shrinkable portion 102 to
connect with or integral with the nonshrinkable portion 103. An air guide
passage 105 is provided in the nonshrinkable member 104.
Referring to fig.4(B), the nonshrinkable member :114 is disposed outside of
the
shrinkable portion 113 to connect with or integral with the nonshrinkable
portion 112. An air 3;uide passage 115, however, is provided in the
nonshrinkable member 114. Next, another practicable modes of the discharge
member are as follows. These modes of the discharge member are adaptable to
the above-described toner containers. In the following modes of practice,
portions or parts subst~~ntially identical to those in the previous modes of
practice shall have like symbols and no further explanation added thereto.
17
CA 02300202 2000-02-08
In an example as shown by fig.6, the position of the opening portion 43 is
different from that in the previous mode of practice. In the previous example,
when the valve body 3 i;~ in the opened position where it is separate from the
toner outlet 23, the opening portion 43 of the valve body operating member 4
is
placed in an inner position relative to the outlet 23 so that the toner within
the
container may be discharged from the toner discharge pathway 42 outward.
With this example, in the opened position, the opening portion 43 of the valve
body operating member 9: is located in an outer position relative to the
outlet 23.
That is, a liason portion 131 which is smaller than the outlet 23 in diameter
is
interposed between the opening portion 43 and the distal end 41 of the valve
body operating member ~~ finable in the connecting portion 32 of the valve
body
3. In this example, when the valve body 3 is urged to separate from the outlet
23
into an opened position, the liaison portion 131 comes flush with the outlet
23 so
as to enable toners to pass between the outlet 23 and the liaison portion 131
to
flow out. Then, the outflows run. through the opening portion 43 and the toner
discharge pathway 42 to the outside. The present example is substantially the
same as the previous mode of practice in the relationships between the main
fitting portion and the main receiving portion, and the sub fitting portion
and
the sub receiving portion; and the strength of forced fitting between each
pair of
the portions.
Fig.5 illustrates an example in which the valve body 3 of the first mode of
practice is formed sep;~rate ~rom the outlet 2, except that the present
embodiment is substantially the same as the previous embodiment in the
relationships between the main fitting portion and the main receiving portion,
and the sub fitting portion and the sub receiving portion; and the strength of
forced fitting between each pair of the portions. In. this example, members
for
guiding the valve body 3 to a proper sliding are provided on the base portion
21
so as to surround the valve body 3. Specifically, a plurality of guide columns
121
are mounted perpendicular to and on the base portion 21. This arrangement
enables the valve body 3 to move axially without any lateral motion under the
guidance of the guide columns 1~:1. A simple contact between the guide columns
121 and the valve body 3 will su~.ce. However, the concrete structure for
guidance may be suitabl;;~ changed; for example, there may be provided in the
valve body 3 holes in whi~,~,h the guide columns 121 are slidably mounted.
18
CA 02300202 2000-02-08
Fig.7 is a sectional view in accordance with further practicable mode of the
present invention, (A) showing a closed position, and (B) an opened position.
In the example of fig.2~, there :is provided stopper 53 between the struts 51,
51.
This example is different from the example of fig.l in that the stopper is not
provided. The valve body 3 is connected with the base portion 21 and two arm
portions 141, 141. These arm portions 141,141 may change their forms from the
in-curved position as shown by fig.7(A) to the upward spreading position as
shown by fig.7(B). The axm portions 141, 141 are strong and resilient to such
a
degree that they may permit the valve body 3 to move up and down in a vertical
direction and support the valve body 3. This example is also substantially the
same as the previous embodiment in the relationships between the main fitting
portion and the main receivzng~ portion; and the strength of the forced
fitting
between each pair of the portions.
The fact that the valve body 3 lowers from the state as shown in fig.7(B) to
that as shown in fig.7(A) to close the outlet 23, when the connection between
the
connecting portion 32 of the valve body 3 and the distal end 41 of the valve
body
operating member 4 is not released will be further explained.
First, in the state of fig.7(B}, the connecting portion 32 of the distal end
41 of
the valve body operating; member 4 and the valve body 3 still remain in
contact
with each other.
Next, as the valve body operating member 4 goes down, the valve body 3
moves downward, too.
When the lower end portion 3~e of the valve body 3 approaches the outlet 23 to
enter the latter, the lower end portion 3e joins with the inner periphery of
the
outlet 23, and then, the lower end portion 3e will be exposed to a force on a
portion extending from its outer' periphery to the center of its interior,
whereby
the lower end portion 3e of the valve body 3 will be subjected to a force from
the
inner periphery of the outlet 23, said force being inclined to squeeze the
lower
end portion 3e to reduce the iinner diameter of the latter. As a result, the
strength in fitting of the distal end 41 of the valve body operating member 4
and
the connecting portion 32 of the valve body 3 will get so strong that there is
no
risk of the distal end 4l. slippizig from the connecting portion 32 of the
valve
body 3.
Thus, the lower end 41 of the valve body operating member 4 is transmitted
19
CA 02300202 2000-02-08
downward, keeping a secured contact with the valve body 3, so as to enable the
main fitting portion 31 o~f the valve body 3 to surely fit with the outlet 23.
Now, the movement oiE' the outlet 23 for opening and closing will be described
in further detail with reference to figs.8 and 9, which are enlarged views of
the
main movements of main portions as shown in fig.7.
Fig.B(A) shows the valve body 3 which is in fitting relation with the outlet
23.
In this state, the valve body operating member 4 is not shown in this view of
drawing because it is located far beneath the valve body 3. In such a fitting
relationship, the seal face 3f oiE the peripheral portion of the valve body 3
is
closely attached to the inner periphery of the outlet 23 to give a highly
airtight
or watertight sealing. A shoulder portion 3g at valve body's side of the lower
portion 3e of the valve body 3 overhanging the exterior is in engagement with
a
shoulder portion 23a at outlet;'s side of the lower portion of the outlet 23
overhanging the interior. This may prevent any sudden release of the valve
body 3 from the outlet 23.
As shown by fig.8(B), i;he valve body operating member 4 goes upward and
enters the connecting portion 32 within the valve body 3. Since the outer
diameter of the distal end of the valve body operating member 4 is smaller
than
the inner diameter of thE~ lower ~end portion 3e of the valve body 3
(particularly,
the inner diameter of the ridges 33a protruding to the inner periphery of the
lower end portion 3e), the distal end 41 can gain easy entry. And the distal
end
41 of the valve body operating member 4 increases gradually in outer diameter
from the most distal end. to a narrow part 41a to become larger than the inner
diameter of the lower end portion 3e of the valve body 3. Therefore, as the
valve
body operating member ~E advances, the lower end portion 3e of the valve body
3
deforms so as to expand outwardly, thus resulting in expansion of its inner
diameter. In this connection, a proper space 3h is provided between the lower
inner wall surface of the outlet 23 and the lower end portion 3e of the valve
body
3 to permit eventual expansion of the lower end portion 3e of the valve body 3
(see fig.8(A)).
As the entry of the valve body operating member 4 goes further, the lower end
portion 3e of the valve lbody 3 enters the narrow part 41a of the valve body
operating member 4 until the Expanded lower end portion 3e returns to the
original state, as shown in fig.9(.~).
CA 02300202 2000-02-08
As the entry advances further, the valve body 3 disengages from the outlet 23
with the lower end portion 3e of the valve body 3 resting in the narrow part
41a
of the valve body operating member 4, as shown in fig.9(B). At this time,
because the lower end portion 3e of the valve body 3 is inside the narrow part
41a of the valve body operating member 4, the engagement of the shoulder
portion 3g at valve body's side in the lower end portion 3e of the valve body
3
and the shoulder portion 23a at outlet's side in the outlet 23 may be
dissolved
moderately.
Finally, as shown in fig.9(C), the opening portion 43 of the valve body
operating member 4 is adapted to be positioned inwardly of the outlet 23,
thereby enabling discharge of toners.
When the outlet 23 is closed by the valve body 3, the process is performed in
a
reverse way to the abo~re-described; the valve body operating member 4 is
pushed downward from t;he position as shown by fig.9(C). Then, the lowermost
end of the lower end portion 3e of the valve body 3 can enter the outlet 23
without strain now that the inner diameter of the opening end of the outlet
inside of the toner container is designed to be larger than the outer diameter
in
the lowermost end of the lower end portion 3e of the valve body 3.
As illustrated by fig.9lB), the outer diameter of the shoulder portion 3g at
valve body's side in the Lower en.d portion 3e of the valve body 3 is larger
than
the inner diameter of the outlet :~3. Thus, if the valve body operating member
4
is pushed further downward, the lower end portion 3e of the valve body 3 will
deform inwardly by recei~ring a force from the inner wall of the outlet 23 so
as to
enter the narrow part 41 of they valve body operating member 4. This action
grows larger as lowering of the valve body operating member 4 increases
further,
and the narrow part 41a of the valve body operating member 4 surely engages
with the lower end portio~a 3e of the valve body 3. This will result in
avoidance of
the valve body 3 coming off the valve body operating member 4.
Further lowering of the valve 'body operating member 4 may cause the valve
body 3 to abut against the end portion of the outlet 23 to ensure that the
valve
body 3 will stop its descc~nt(see fig.9(A)). With the lowering of the valve
body
operating member 4 beimg further increased, the lower end portion 3e of the
valve body 3 expands outwardly, followed by disengagement of the narrow part
41a from the projection 33a protruding to the inner periphery of the lower end
21
CA 02300202 2000-02-08
portion 3e of the valve body 3 (fig.8(B)), thereby causing a return to the
original
state (fig.8(A)).
Fig.lO is a perspective view of a main portion of the toner cartridge in
accordance with further mode of practice of the present invention.
A discharge member a!O1 in accordance with this mode of practice, which is
made of synthetic resin, includes a substantially cylindrical base portion 202
having a flange portion ;Z03 formed on the lower end thereof. The base portion
202 is fixedly secured to a toner container 204 by hot welding. In the
drawing,
arm portions 205, 205 rise from the both sides of the upper end of the base
portion 202 to extend toward the center therebetween respectively. There is
provided a valve body 206 connected in series with the distal end of the arm
portions 205, 205.
A through-guide passage 207 is provided extending in a vertical direction in
the middle of the base portion 202 of the discharge portion 201. The upper end
of
the guide passage 207 provides an outlet 208, whose lower end forms an
engaging step 208a.
A main fitting portion 209 with which the valve body 206 is formed is adapted
to engage with the outlet 208 (i.e. a sub fitting portion). Namely, the outer
periphery of the lower en.d of the valve body 206 constitutes main fitting
portion
209. An engagement of this specific main fitting portion 209 of the valve body
206 with the engaging step 208a of the outlet 208 may lead the outlet 208 into
a
closed position. In this c;~se, the both arm portions 205, 205 resiliently
bend in
response to the vertical movement of the valve body 206 and has a sufficient
strength to support the letter.
Inside of the valve body 206 is provided a connecting portion 213 which is
connected with the distal. end of a valve body operating member 211 which acts
to give directions for toner discharge, and an engaging step 214 is formed
extending in a peripheral direction in the lower part of the inner periphery
of
the connecting portion 21.3.
The valve body operating member 211 for supplying toners to the toner
container 204 is like a rod in shape, having a tip-connecting portion 212 (sub
fitting portion) formed on the distal end portion thereof so as to be received
by
the connecting portion 213 of the valve body 206. An engaging groove 215 is
formed extending in a peripheral direction in the lower part of the tip-
22
CA 02300202 2000-02-08
connecting portion 212 so that the engaging groove 215 may engage with the
engaging step 214 of the valves body 206. The valve body operating member
211 serves as a toner discharge means, too, including a toner discharge
pathway
215 formed longitudinally of its center, and a plurality of opening portions
216
formed extending in a peripheral direction a little below the tip-connecting
portion 212.
The lower part of each opening portion 216 is a little larger than the upper
part of same in outer di;~meter, and its outer diameter is substantially
identical
to the inner diameter of the guide passage 207 of the discharge portion 201.
The valve body operating member 211 goes up until the step portion 217
formed around the entire periphery is brought into contact with the lower end
of
the outlet 208, and the ~~alve body 206 is Lifted accordingly, so that the
opening
portion 216 advances vlward of the toner contaW er relative to the outlet to
ensure that the toner is ready for supply (fig.10).
After the termination of toner supply, the valve body operating member 211
retrogresses to the guidE~ passage 207 of the discharge portion 201. At this
time,
now that the valve body 206 is in contact with the distal connecting portion
212
of the valve body operating member 211 through the connecting portion 213, the
valve body 206 is drawn toward the outlet 208 (to the lower part of the
drawing),
whereby the main fitting portion 209 of the valve body 206 is fitted in the
outlet
208 to close the latter. This example is also substantially the same as the
previous modes of practice in the relationship of the main fitting portion and
the
main receiving portion" and the sub fitting portion and the sub receiving
portion; and the strength of a forced fitting between each pair of the
portions of
each group.
Fig.l1 is a perspective view explanatory of the main part of the toner
cartridge in accordance with further mode of practice.
In the previous example, the valve body operating member 4 is provided with
the toner discharge pathway, but herein, this figure of drawing shows a valve
body operating member :&ee from toner discharge pathway.
An outlet 301 is made from synthetic resin, disposed on the peripheral edge of
a toner container 302, and formed with a cylindrical base portion 303 having a
flange portion 304 formed at the lower end portion thereof. Said base portion
303 is joined by hot welding to the peripheral edge of the toner container
302. In
23
CA 02300202 2000-02-08
the drawing, a guide passage 305 extends through the base portion 303 for
communication with the inside and outside of the toner container 302. Arm
portions 306, 306 axe formed opposite to each other with the guide passage 305
interposed therebetween., extending from the upper part of the base portion
303
upward to the center point respectively until the distal ends of the arm
portions
306, 306 are joined to a valve body 307. The valve body 307 has a
substantially
spherical shape, and the outer periphery of the valve body 307 represents a
main fitting portion 311.
As aforementioned, the guide passage 305 is provided extending in a vertical
direction in the middle o~E the baae portion 303, having an outlet 308 formed
over
the upper end of the guide passage 305 in such a manner that the main fitting
portion 311 of the valve body 30'l may be received airtight by the outlet 308.
The
outlet 308 has an inner ;periphery so inclined that its inner diameter
gradually
increases upward.
Both the arm portions 306, 306 may bend resiliently in response to the
vertical movement of the valve body 307 and has a su~cient strength to support
the latter.
A rod-shaped valve actuating member 309 is provided extending from the
bottom of the valve body 307 downward to pass through the guide passage 305.
The valve actuating member 309 has a guide plate 310 formed in the middle
thereof. The guide plate 310 helps center the valve actuating member 309 so
that the former may properly guide the latter inside of the guide passage 305,
and the guide plate 310 may also act to seal the guide passage 305 when the
valve actuating member 309 is pushed downward.
Specifically, when the outer diameter of the guide plate 310 is identical to
or
larger than the inner diameter of the guide passage 305, the guide plate 310
is
brought into a close contact with the guide passage 305, so that when the
valve
actuating member 309 moves up and down, the guide plate 310 may center the
valve actuating member 309 for a sure guidance. The guide plate 310 may also
play the role of a covering by which the guide passage 305 is sealed during
the
vertical movement of the valve actuating member 309.
If the outer diameter of the gi:ude plate 310 is larger than the inner
diameter
of the guide passage 30~~, the guide plate 310 must be made of a resilient and
elastic material, and if tlae outer diameter of the guide plate 310 is
identical to
24
CA 02300202 2000-02-08
or smaller than the inne~c diameter of the guide passage 305, the guide plate
310
may be made of either rigid or eilastic material.
The valve body operating member at the developing device side is not shown
in Fig. 11, but it will do if it is capable of putting the valve actuating
member
309 in a vertical motion. By way of illustration, a valve body operating
member
may be enumerated which acts. to grasp the valve actuating member 309 by
means of a chuck to move the valve actuating member 309 in a vertical
direction
by moving the chuck up .and dov~,~n. A member engageable with the lower end of
the valve actuating member 309 may be used as a valve body operating member,
which member may move up and down together with the valve actuating
member 309 kept in abul;ment therewith.
A toner discharge pathway in the device such as copiers will do if it is
capable
of receiving discharges from the guide passage 305. The opening of the
discharge pathway (not shown) may be a cylindrical element which is formed
thereinside with a connecting hole which can discharge toner. Another
cylindrical element is a type which can be fit into the guide passage 305 of
the
discharge member 301, or a type which can fit on the outer periphery of the
flange portion 304 provided on the lower end of the discharge member 301.
The former type is pre:E'erably provided in the distal end thereof with a
valve
body operating member serving to give motion to the lower end of the valve
actuating member 309 ;end in addition, there must be disposed between a
pressing member and th.e inner periphery of the cylindrical member a space
which allows toner to pass therei;hrough.
Similarly, in the case of the latter type, a valve body operating member
serving to actuate the valve actuating member 309 must be formed extending
from the upper end of the cylindrical element into a lower connecting hole,
and
there must be disposed bE~tween i;he pressing member and the inner periphery
of
the cylindrical member a space vc~hich allows toner to pass therethrough.
There may be available a procE~ss of discharging toner from the guide passage
305 direct into the toner reservoir of the device without the aid of a limited
guide passage such as thE~ cylindrical element.
The discharge process ~:or tone:r in accordance with this mode of practice is
as
follows.
The valve actuating member 309 is engaged with the valve body operating
CA 02300202 2000-02-08
member of the device, and the pushed upward as it stands. This urges the
valve actuating member 309 to move upward, thereby to separate the valve
body 307 connected av°tight v~i.th the outlet 308 from the latter to
cause
discharge of toner. In the termination of discharge, a reverse operation takes
place so as to fit the main fitting portion 311 of the valve body 307 in the
outlet
308, thus resulting in stop of toner discharge. At that time, even in the
middle of
the discharge operation, any extra discharge of toner may be avoided by the
guide plate 310.
In this example, the valve actuating member 309 is formed integral with the
valve body 307, but the both members may be formed separate from each other.
In that case, an arrangement is available such that the valve actuating member
309 may be connected with the valve body 307 by a fitting operation. This
fitting
structure may be the same as that composed of the connecting portion and the
valve body operating member in the mode of practice as shown in fig.2.
It will be understood from the above explanation that in this mode of
practice,
the valve actuating member 309 constitutes a part of the valve body 307 and
the
connecting portion relative to the valve body operating member of the device
may be provided in a ;proper position such as the lower end of the valve
actuating member. The valve body operating member of the device may be made
similar to the valve actuating member 309 in configuration, and said valve
body
operating member may be connected with the valve body 307 by the same fitting
structure as that composed of the connecting portion and the valve body
operating member in the embodiment as shown in fig.2.
Fig.12 illustrates further mode of practice, in which the entire toner
container
401 is made of hard thE~rmoplastics. Materials, such as other hard synthetic
resin or metal, which do not deform under the atmospheric pressure may
selectively be used. A discharge member 2 may be of a similar type to those
used
in the previous embodiments, and may be mounted on the toner container 401
in a suitable place. The toner container 401 may be made rectangular, cubic,
or
columnar. In this example, the toner discharge member 2 is positioned on an
end face 411, but it may be mounted on other place such as a square portion
412
or side face 413.
The method of use is the same as those in the previous modes of practice.
Specifically, the toner container 401 is mounted on the device such as copiers
in
26
CA 02300202 2000-02-08
such a manner that the ifischar~;e member 2 will be positioned in the lower
end
of the container (not sho«vn). The valve body operating member is arranged
such
that it may put the toner container in an opened position by its elevation, as
in
the previous example. In this connection, the toner falls by gravity from the
opening portion of the valve body operating member, past the discharge
pathway and into the toner reservoir such as hoppers. However, the discharge
of
toner may also be achieved by applying pressure to the inner side of the toner
container 401. In that case, the discharge member 2 may be disposed on the
upper side of, or laterally of the toner container 401. In order to effect a
high
pressure in the toner container, .an air inlet (not shown) is provided in a
suitable
section of the toner container 4iD 1, thereby to increase the pressure inside
the
container to carry out the disch;~rge of toner. Even in the case of the
discharge
by gravity-drop, though :no increase of the inside pressure is necessary, the
air
inlet (not shown) may be used to avert reduction of the inside pressure.
Alternatively, a conveying screw or agitator may be mounted inside of the
toner
container 401 so as to send the toner to the discharge member 2 mechanically.
The present invention may be embodied in the foregoing modes of practice. In
particular, it may be advantageously embodied in the following structures. In
the toner cartridge comprising a toner container containing powder or liquid
toner for use in the devE~loping device, and a discharge member for supplying
toner from the toner container t;o the developing device, the toner container
is
provided with a shrinkable portion which may shrink according to the amount
of toner consumed withizi the toner container, and the toner discharge member
is composed of a toner outlet, and a valve body adapted to open said outlet
when
a valve body operating ncember of the developing device is at work and to
close
said outlet when the valve body operating member of the developing device is
at
rest; and the valve body is formed with a main fitting portion of closing the
outlet by fitting in the outlet. In this connection, as the outlet is closed
by the
valve body when the discharge of toner from the toner container comes to end,
there will occur no leakage of toner. And besides, because the valve body and
the
outlet are fittingly (preferably forcibly ) connected with each other, such a
connection is not easily dissolved even by vibration to ensure that extra
discharge or leakage of toner will be prevented. Furthermore, since the toner
container may shrink a~ccordin~; to the discharge of toners within the toner
27
CA 02300202 2000-02-08
container on the basis that the toner container is formed with a shrinkable
portion of shrinking in response to the reduced amount of toners within the
toner container, the toner disch.airge can be carried out without any risk of
air
invasion of the container. As a result, the quality of toner contained in the
container can be prese~wed well intact . Additionally, by providing a toner
discharge pathway in the valve body operating member, or connecting a
cylindrical outlet at the device side direct with the guide passage 305, the
interior of the toner container is connected direct with the toner reservoir
via a
sealed pathway, thereb;;~ to preclude any invasive risk of the open air. This
enables supply of toner to the device in a more stable mode. In the above-
described embodiments, different kinds of methods for filling the toner
container with toner ma;y be utilized. Employment of a reverse procedure to
the
discharge may readily obtain miore desirable filling conditions. With the
valve
body operating member with a toner discharge pathway, this toner discharge
pathway may be used as a pathway for filling purpose in a toner-filling
device.
In other words, the valvE~ body operating member may be utilized as a nozzle
for
filling purpose in the toner-filling device. In the embodiment as shown by
fig.9,
the toner discharge pathway of the cylindrical member may be used as a toner-
filling pathway (not shown). Namely, such a filling pathway may be constituted
by a guide passage 305 i:n the form of a cylinder. Specifically, the opening
of the
filling pathway may constitute a cylindrical member having a connecting hole
which can fill the container with toner. In addition, this cylindrical member
may
be of a type which is fittaible into the guide passage 305 of the discharge
member
301, or which can fit on the outE~r periphery of the :Flange portion 304
located on
the lower end of the discharge member 301. In particular, in the use of the
toner
container provided with the shrinkable portion, when the shrinkable portion is
in a shrink position, the toner container may be filled with toner by
supplying
the toner from the disclLarge member. Thus, since the toner container can be
filled with toner with air rarely got mixed therewithin, the container can be
almost completely filled with toner so that the toner can be preserved without
deterioration for long periods. And as the filling operation takes place with
substantially none of our remaining in the container as a result of the
complete
shrink of the shrinkable portion of the toner container, the filling operation
can
be performed with a high speed without necessity of eliminating air from the
28
CA 02300202 2000-02-08
container or introducing air into the container.
Various modifications and ali;erations of the present invention may be made
outside the modes of practice set forth herein. For example, the arm portions
in
the modes of practice of this invention may be always biased downward (in a
direction in which the v~clve body will close the outlet). The guide plate 310
may
be provided in any of the valve body operating members in accordance with the
other modes of practicE: . The toner may be allowed to drop by gravity for
discharge, or a pressure may be applied from outside to the shrinkable portion
of the toner container for a positive acceleration of discharge of toner.
A means may be represented as means of accelerating toner discharge
positively for applying external pressure to the shrinkable portion of the
toner
container, using an app~iratus o~f mechanically applying force, such as a
piston.
In the alternative, toners can b~e absorbed by means of a pump provided in the
developing device. At any rate, except for the gravity-drop, means to
positively
accelerate the discharge of toners from the toner container by mechanical
force
or fluid pressure may be added i:or the toner discharge.
The above-described filling operation will be explained in further detail. If
a
toner discharge pathway is provided in the valve body operating member, this
toner discharge pathway may be used as a toner filling pathway of the toner
filling device. Speci.ficaTly, the valve body operating member in the
foregoing
embodiments may be used as a :611ing nozzle of the toner filling device.
Namely,
the valve body operating; member as illustrated in the embodiments is provided
in the leading end of a powder aupply line (not shown), such as a pipe or
tube,
provided in the toner filling device (not shown) to serve as filling nozzle.
The
toner filling device (not shown) :is actuated to fill the toner container in,
using a
pressure applying means such as pumps provided in the toner filling device
(not
shown) or by gravity.
Referring to another form of fiilling operation, fig. l3 shows a second
discharge
member 602 having the Name structure as that of the discharge member 2 in the
previous embodiments and provided in a toner container 601. This toner
container 601 may be the toner container 1 formed with the same shrinkable
portion as that of the previou:> embodiments or the toner container 401 not
having a shrinkable portion bui; a high rigidity with which the toner
container
can resist change of form by the atmospheric pressure. In said toner
container,
29
CA 02300202 2000-02-08
the discharge portion 2 of the goner container 601 is utilized as a toner
filling
pathway, and the valve 'body operating member 4 is used as filling nozzle of
the
toner filling device to fill the toner container 601 with toners. In that
case, a
valve body operating member 603 which is the same in shape as the valve body
operating member 4 of the previous embodiments is connected with the second
discharge member 602. The air within the toner container 601 is discharged
from the second disch<<rge mE~mber 602 through the valve body operating
member 603. This ma3~ keep the pressure within the toner container 601
constant. In this case, it is preferable that air be discharged with a filter
arranged in the passageway, using the second discharge member 602 having
means for preventing discharge of toners, or the valve body operating member
603. Furthermore, the discharge of the air from the toner container 601 may be
achieved in a natural way, or in an positive way by an absorbing means such as
pumps (not shown). That is, the valve body operating member 603 is employed
as absorbing nozzle connected with the absorbing means such as pumps to
absorb the air within they toner container 601 from the second discharge
member
602 and past the valve body operating member 603.
A pressure regulating valve or check valve may be substituted for the second
discharge member 602 and v~~lve body operating member 603. The second
discharge member 602 is, hov~ever, advantageous in that a reliable closed
position can be obtained by said special valve structure after the connection
with the valve body operating member 603 has been dissolved.
After this toner filling process (i.e. after the stop of toner supply), the
air can
be discharged from the t~~ner container 601. This may follow the discharge of
air
in the described filling process, or may be performed in another process. If
the
latter case is employed, ;~ toner container with no second discharge member
602
(for example, toner container 1 with a single discharge member 2 as shown in
fig. l) is available for practice. In this case, after the valve body
operating
member 4 used for toner filling has been removed from the toner container 1,
the valve body operating member 603 connected with the absorbing means is
connected to the discha~~ge member 2 for absorbing operation. In this case,
the
provision of a filter in the discharge member 2 may render the toner discharge
difficult, and therefore, :it is preferable that the filter be arranged in the
valve
body operating member 603 connected with the absorbing means for the
CA 02300202 2000-02-08
purpose of prevention of toner leakage.
Using the aforementioned forced air absorption, air can be absorbed to such
an extent that a vacuum or a state next to the vacuum is produced. However,
too much absorption ma;~ cause the hardening of toners, resulting in decrease
in
its flowability, so the absorption of a quantity of air (air pressure)
suitable for
the preservation and av~~ilabilit;y of toners is desirable.
The absorption of air within the toner container may be appropriately carried
out by the toner container 1 formed with the shrinkable portion, but the toner
container 401 having a bugh rigidity and a strength sufficient to resist
change of
form by the atmospheric pressure can also do the same thing. The second
discharge member can be used i;o discharge the air within the toner during and
after the supply of toners to the toner container to adjust the air pressure
within
the toner container, or to introcLuce air or other fluids into the toner
container.
Additionally, such a discharge or introduction of fluids can be carried out
during
the transportation of the toner container or after the toner container has
been
set in the developing device. In particular, toners can be discharged from the
toner container through the first discharge member in operation. Consequently,
the second discharge member can be used for adjustment of the air and
atmosphere within the tuner container as needed.
Finally, an advantageous mechanism for attachment and detachment
between the valve body at discharge member's side and the valve body
operating member will be described. As a first example for the attachment and
detachment is recited tb.e manual or automatic dissolution of a coupling of
the
valve body at discharge :member's side and the valve body operating member by
the discharge member provided in the toner container which is actuated by a
working member such as lever or spring as provided together with the valve
body operating member at the developing device's side of copier.
As shown in figs.l4 arid 15, tlhe valve body operating member 4 is secured to
the developing device of copier with an opening 42c communicating with the
toner reservoir of the developing device. More specifically, a supporting
portion
45 is formed at the end side o~f the opening 42c of the valve body operating
member 4 and fixed to the developing device. There is provided in this
developing device a slide lever 501 as a working member for connecting and
disconnecting the valve body 3 at discharge member's side and the valve body
31
CA 02300202 2000-02-08
operating member 4. The lever 501 has a long hole 503 formed on the upper face
to extend in a direction in which the lever 501 slides. The valve body
operating
member 4 is sited withim the long hole 503 so as to pass through the latter in
a
vertical direction. There is formed on the peripheral edge of the long hole
503 a
flat portion 504 and a s.~ope poi.°tion 505 gradually rising from the
flat portion
504 backward (in a righl~-hand direction of fig. l4, in other words, in a
direction
in which the slope portion 505 goes away from the valve body operating member
4). The flat portion 504 is spacious enough to rest thereon a flange portion
24 of
the lower end of the discharge member 2 which is in contact with the flat
portion 504 while the valve body 3 at discharge portion's side and the valve
body
operating member 4 are :in fitting relationship. A fingering portion 506 is
formed
in the rear end of the slope portion 505 for pushing the lever 501 into
sliding,
under which a spring receiver 5177 is provided.
On the other hand, there i.s another spring receiver 47 formed in the
supporting portion 45 of the valve body operating member 4 in a section
opposite to the spring receiver ~i07, and a spring 508 is interposed between
the
both spring receivers 507, 47. Z'he spring 508 is intended for biasing the
lever
501 backward at all times. The spring 508 is a compression coil spring. With
the
fingers put on said finge~zng portion 506, the lever 541 is advanced by
pushing it
forward (in a left-hand direction of fig.14, in other words, in a direction in
which
the slope portion 505 approaches the valve body aperating member 4) against
the biasing force of the spring ~i08, and then, the slope portion 505 goes
under
the flange portion 24 of the discharge member 2. As the lever 501 is further
advanced, the slope portion 505 lifts the flange portion 24 with the result
that
the discharge member 2 will come out of the valve body operating member 4 (see
fig.15). This may set the toner container provided with the discharge member 2
so free that the toner container can be taken out; of the developing device of
copiers by hand. After the discharge member 2 has been separated from the
valve body operating member 4, the fingers are detached from the fingering
portion 506, and then, ohe lever 501 goes back to the initial state under the
influence of the biasing force of ithe spring 508.
When the toner container with discharge member 2 is mounted on the
developing device of copiers, the discharge member 2 of the toner container is
fitted onto the valve body operating member 4. In such an event, as
32
CA 02300202 2000-02-08
aforementioned, the lever 501 is in the retreated position, thereby providing
no
obstacle whatsoever, so that the discharge member 2 may be mounted on the
valve body operating mf~mber 4 in a simple way. When this operation has been
completed, the flange portion 24 of the discharge member 2 abuts against the
flat portion 504, as shov~~n in fig. l4.
In order to obtain a se~~ure sliding of said lever 501, there are provided on
both
sides of the lever 501 guided piE~ces 509, 509 facing downward, as illustrated
by
figs. l6 to 18. These guided pies:es 509, 509 are slidably fitted in guide
grooves
(not shown) provided ire the developing device of copiers. The lever 501 may
slide back and forth under the guidance of the guide grooves (not shown).
The above-described E~xample~ is indicative of a mechanism for actuating the
discharge member 2 to move to or away from the valve body operating member 4
fixed to the developing device. More specifically, said mechanism includes the
lever 501 with slope because the latter is used to force the discharge member
2
into motion as a working member for attachment and detachment between the
discharge member 2 anf, the valve body operating member 4, and the spring 508
because it is used to move the lever 501. However, this spring 507 is not
always
necessary. A design may be used that the lever 501 can be moved back and forth
by hand or a drive such as an electric motor or air cylinder. The lever 501
may
be of a horizontal- or vertical-movable type, or a type of lever that can lift
the
discharge member 2 using the principle of lever. A spring may be used to act
direct on the discharge member 2 to lift it.
In the alternative, as a working member for attachment and detachment
between the discharge member 2 and the valve body operating member 4, a
member may be used that can support portions such as flange portion 24 within
the discharge member 2 in a manner that they may move in a vertical direction.
Such a working member can be used to not only separate the discharge member
2 from the valve body operating member 4, but also allow the discharge member
2 to come near the ~ralve body operating member 4. For example, the
relationship between the discharge member 2 and the valve body operating
member 4 was indicated to included three different modes, i.e. the first one
wherein the valve body 3 of the discharge member 2 and the valve body
operating member 4 are kept separate from each other, the second one wherein
the valve body 3 of the discharge member 2 and the valve body operating
33
CA 02300202 2000-02-08
member 4 are kept in a complete contact with each other, and the third one
wherein the valve body 3 of t;he discharge member 2 and the valve body
operating member 4 arE~ not completely separate from each other, while the
valve body 3 is in a closed position. In order that these three modes can be
selected, the selection of the disltance between the discharge member 2 and
the
valve body operating member 4 may permit the discharge member 2 to readily
move to or away from thf~ valve body operating member 4.
All what the working member for attachment and detachment between the
discharge member 2 anti the valve body operating member 4 has to do is to
actuate at least one of the discharge member 2 and the valve body operating
member 4 so that the discharge member 2 and the valve body operating member
4 will move to or away from each. other. Thus, in the said example, the
discharge
member 2 was a movable element, but contrary to this, the discharge member 2
may be of a stationary type, while the valve body operating member 4 may be
designed for a movable element. As a second example for the attachment and
detachment recited an vastance that in order to open and close the discharge
member 2 provided in the toner container, the discharge member 2 is attached
to or detached from the valve body operating member 4 by fixing the discharge
member 2 to a fixing position so as to actuate the valve body operating member
4 manually or automatically. Fiig.l9 shows this specific example, wherein the
discharge member 2 is rendered unmovable in a vertical direction by means of a
fixing member 511 provided at the side of the developing device of copiers. In
this example is shown discharge member 2 which is kept unmovable in a
vertical direction by thE~ flange portion 24 that has been forced into a hole
provided in the fixing mE~mber 511. For example, a rigid toner container
having
no deformable part can be kept stationary by pressing the upper and lower ends
thereof. The discharge member 2 or the toner container may be kept at rest by
a
mechanical device such as chucks. Proper measures may be taken to practice
said methods for inabilit;;~ to move in a vertical direction.
On the other hand, the valve body operating member 4 is provided in the
developing device so that; it may move in a vertical direction. In this
instance, a
guided portion 512 is provided below the valve body operating member 4, while
there is provided on the ride of the developing device a guide 513 such as a
guide
groove which may receive said guided portion 512 so that it can slide in a
34
CA 02300202 2000-02-08
vertical direction. The attachment and detachment between the discharge
member 2 and the valvE~ body operating member 4 may be achieved by moving
in a vertical direction a~ handlE~ 514 extending from the valve body operating
member 4 sideways. Fig;. l9 shows the valve body 3 of the discharge member 2
and the valve body operating member 4 in fitting relationship with each other.
The valve body operating member 4 may be removed from the valve body 3 of
the discharge member 2 by the valve body operating member 4 which is sledded
downward by pushing down the handle 514.
In this instance was cited a valve body operating member 4 operable by
hand-powered handle. However, as in the previous example, members with
slope, or members which. is driven by a mechanical device such as air cylinder
or
electric motor may be used. In either second example or first example, the
attachment and detachment between the discharge member 2 and the valve
body operating member 4 includes not only the transition from a position in
which the valve body 3 of the discharge member 2 and the valve body operating
member 4 are being coupled one to another to a position in which the both
members are separate firom each other but also the transition from the former
position to an intermedi;~te semicoupled position (the valve body 3 and the
valve
body operating member 4 are kept unseparated from each other but the valve
body 3 is in a closed position). Furthermore, the working member preferably
may help to realize or complete at least one of these transitions. Thus, for
example, the working member may be designed to handle only the transition
from a coupled position 1;o an uncoupled position, and not the transition from
an
uncoupled position to a coupled position.
As previously noted, with an arrangement such that at least one of the
discharge member 2 and the valve body operating member 4 is made movable,
the attachment and detachment; between the discharge member 2 and the valve
body operating member 4 can be achieved by manually or automatically
actuating the working :member for moving the discharge member 2 and the
valve body operating member 4 to or away from each other. This may save
troubles necessary for said attachment and detachment, and render said
operations easy.
Industrial Applicability
CA 02300202 2000-02-08
The present invention. is usable in a toner cartridge for supplying powder or
liquid toner (including printing ink) for use in copying machines, printers,
or
pressing machines and its opening and closing mechanism for toner pass-
through. '
Furthermore, the present invention is not limited to the toner container as
set
forth but is applicable to supply containers for many other kinds of liquids,
powders, or particles and its opening and closing mechanism for pass-through.
The present invention is also usable for coffee, soaps, juices, syrups,
paintings,
detergent, cosmetics, chemical ;products, motor oil, adhesives, medicine,
every
sort of foods, drinks, inedible liquids, powders, or particles. It will be
appreciated by those skilled in the art that further changes in design, and
combinations are availai~le based on the above descriptions.
36
