Note: Descriptions are shown in the official language in which they were submitted.
2~3~7~
DEVICE FOR THE STEPWISE DISPENSING OF PRODUCT
The present invention relates to a device for the
stepwise transport by rack of a pressing plate, for instance
on dispensers for the portioned dispensing of products, for
example products of a paste-like nature, in which device the
pressing plate moves in opposition to the displacement of a
handle which returns the basic position under spring action.
A device for stepwise rack transport of this type is
known from EP OS O 248 278 (Fig. 102). In that case, the
pressing plate is developed as a climbing piston against
which the lower end a bag filled with a paste composition
rests. Upon displacement of the handle, the edge of the
1, piston cooperates alternately with a transport strip arranged
p in pairs and acted on by said edge and a stationary abutment
tooth strip provided in pairs. This development, however
not only requires the additional expense of an additional
pair of toothed strips, but the corresponding increase in
size of the roughening zone determined by the tooth structure
within the device also results in an additional source of
mechanical stress on the wall of the bag and this on an
intermittently moveable element. The transport tooth strips
namely carry out a forward and return stroke. The roughening
action of the toothing which is arranged almost over the full
surface on the inside can furthermore also have a braking
effect so that the device requires particularly strong
restoring springs if it is not to operate sluggishly. This,
in its turn, means a higher operating force.
A similar device is known from French Vnexamined
: I
Application 2 489 267. In that case, however, the product to
be dispensed is delivered in direction opposite the direction
: `~
2030176
of displacement of the handle.
From US Patent 3 774 816 (Fig. 2), it is known to
displace a central rack in direction of delivery via two
pawls which act alternately on the rack. A pressing plate
which presses the paste composition out is present in this
direction.
r Finally, from US Patent 2 361 647 it is known to effect
the advance of the pressing plate via a flexible setting
member in a shape of a flexible peaked hat, which is arranged
centrally on the back of the piston. By pressing against the
rim of the hat, as is possible in view of a correspondingly
elastic housing wall, the pressing plate is shifted stepwise
in the direction towards the dispensing opening of the
~.,
; dispenser. This solution is not known to have gained
acceptance in practice.
The object of the present invention is to improve a
~; device of this type for the stepwise transport by rack of a
pressing plate so that it is of better functional
construction and easier to operate.
This object is achieved by the invention set forth in
Claim 1.
~.
The subordinate claims set forth further advantageous
developments of the device of the invention.
As a result of this development, a device of this type
of increased value of use is obtained: the technical expense
is reduced; one gets along with only one type of toothed
~` strip, namely the stationary one. This results in gentler
:
` treatment of the product. The handling is also more
favorable. There is a direct-acting positive control.
~- Specifically, two abutment plates which rest alternately
! against the rack are associated with the pressing plate, they
t~ ~ --2--
!'
S~
2030~
approaching each other upon displacement of the pressing
plate in the direction opposite the urging of a spring.
While the one abutment plate serves as stationary support,
the other abutment plate is carried along. The abutment
plate which is carried along then comes against, and by
spring force, pushes the other abutment plate a step forward
in the direction of delivery. The relative movement between
. . .
the two abutment plates takes place in the back of the
product zone. Therefore, the above-indicated stresses do not
occur with respect to the moving parts. The trigger for the
actuation is the content of the dispenser, which can be
placed under pressure load. Specifically in this connection,
the loading of the pressing plate is obtained by the action
on it of the wall of a cartridge bag containing a paste
composition as product, the bag being provided at its upper
end with a headpiece which forms the handle at the top and is
freely displaceable with axial limitation within a tubular
housing. The headpiece which is supported for free
displacement with axial limitation makes it possible to
transfer the operating force directly to the bag. On the
other, bottom end of the bag there is also a favorable
balanced central flow of force. The content of the bag
itself, due to the mass which forms a supporting core, acts
like a "rod" or an extended handle of the headpiece. All of
this is contained in protected manner within a tubular
housing which is gripped by the hand of the user, the index
finger, which extends over the top piece, effecting the axial
movement thereof. It is furthermore proposed that each
abutment plate have two diametrically opposite detent tongues
which engage correspondingly at different levels into the
tooth gaps of two opposite rack strips. In view of the
-3-
''" .
203~ 76
desirable high flexibility of the detent tongues, with
nevertheless good stability of standing, it is advantageous
for the detent tongues to have a comb-tooth structure which
extends from a downward directed plate rim. Furthermore, one
advantageous feature of the development consists therein that
the upper abutment plate bears via a bushing the lower
abutment plate, the bushing having at its lower end lift
fingers which engage below the lower abutment plate and, upon
displacement of the pressing plate, displace the lower
abutment plate, guided on the bushing, in the direction
towards the upper abutment plate. These correspondingly
radially directed lift fingers are advisedly arranged at
equal angles apart so that the forces of transmission act
with equal justification. In this connection, one
advantageous embodiment is also seen in the fact that the
lift fingers are developed in double-arm fashion and the
inward extending arms are acted on by the lower end of a ram
of the pressing plate. The inwardly pointing arm is advisedly
somewhat shorter than the outwardly pointing arm so that the
pressing plate forms a certain increased abutment force and
primarily paste composition is forced out. Upon the reaching
of a given pressing pressure, the abutment force is overcome,
leading to the automatic commencement of the follow-up
movement of the transport unit. In view of the desired
development with rotational symmetry, the ram is located in
the center of the transport unit created. For reasons of
attachment as well as functional reasons, it is advisable to
develop the end of the ram which cooperates with the inner
arm of the lift fingers in dome-shaped manner. Such a
solution furthermore proves particularly resistant to wear.
Furthermore, an advantageous development is obtained by a
2030~L7~
snap-button-like clip attachment between the inward extending
arms of the lift fingers and a pin on the lower end of the
ram. The latter forms the male part while the central
opening surrounded by the basic position of the inner ends of
the lift fingers forms the female cavity. With respect to
the means applying the spring load, a development is
favorable in which spring elements for the spreading apart of
the abutment plates are provided in the annular space
surrounding the bushing. As an alternative, it is, of
course, also possible to interpose a coil compression spring,
in which case the bushing, which extends in bridge-like
manner from abutment plate to abutment plate, could, at the
same time, take over the guidance for such a spring. The
radial protrusion of the plates beyond the cross section of
the bushing creates, almost positively, such a space which
can be used as spring chamber. Furthermore, an advantageous
development results from the fact that the spring elements
are developed as spring tongues which are formed on the one
abutment plate and rise in circumferential direction. For
this, recourse is had to plastic materials having suitable
properties of resilience. Practically all parts of the entire
device consist of plastic. One particularly simple way of
supporting the double-arm lift fingers is that the lift
fingers are formed via film hinges on the lower bushing edge,
the film hinges lying somewhat behind the front edge of the
bushing. The corresponding backward displacement can
advantageously be utilized for lateral guidance of the lift
fingers, which is also a feature of the present application.
Furthermore, it is advantageous for the transport unit which
consists of pressing plate and abutment plates for a use of
the tubular housing having the toothed strips to be rotatable
.
-5-
2~30~7~
in such a manner that the detent tongues emerge laterally out
of the region of the toothed strips in order to obtain free
return movement of the transport unit opposite the blocking
direction of the teeth into the starting position. The
latter is also limited by stop. Such a development is
particularly environment-friendly, since it removes from the
dispenser its disposable use and the disadvantages inherent
therein. Such a dispenser can then be used again repeatedly
by insertion of a new cartridge, a new bag, a new stack of
tablets, etc. Structurally, it is furthermore of advantage
in this connection that the relative movement is effected by
turning, namely on a turnable rim on one end of the insert
and that the transport unit has radially outwardly directly
slide blocks which travel in rail guides of the tubular
housing surrounding the insert. This development gains
further in importance with regard to desired simple assembly
as well as reliability of the transport unit insofar as the
lower abutment plate develops passage openings for the lift
fingers of the upper abutment plate for a bayonet-like
mounting (insert/turn attachment) of the two parts in the
manner that the slide blocks lie one above the other in a
straight line and the loosening again of the bayonet
attachment is secured by the rail guidance of the slide
blocks. The pressing plate can be put together as a
preassembly and can also be conveniently detached again at
any time for the purpose of cleaning, should this become
necessary. From the standpoint of manufacturing technique,
the following solution is also advantageous, it consisting
therein that the upper abutment plate is developed with
windows which are arranged aligned with the lift fingers.
Through these windows there can therefore protrude core parts
'
-6-
203017~
of the injection mold, which parts are responsible for the
shaping of the upper region of the lift fingers.
Another advantageous development with respect to the
holding together of the dispenser is obtained by a lock pin
of the tubular housing, which pin grips over an end ring of
the insert. In this connection, a further advantageous
development resides therein that the end ring is provided on
the grip-over side with detent troughs for the entrance of
the lock pin in the final turned position of the insert.
What is meant here are the two end positions of turning, one
of which is reserved for the "dispensing" function and the
other for the "filling" function. Thus defined feelable
detent positions are present. Finally, the invention also
proposes that the headpiece of the cartridge bag be engaged
on resilient fingers which are provided on the upper end of
the insert. The detent engagement is designed on a
reversible association of the headpiece and therefore also in
line with continuous reusability of the dispenser.
.,. ~
The object of the invention is explained in further
detail below with reference to an embodiment shown in the
drawing, in which:
Fig. 1 is a side view of the dispenser provided with the
~J device of the invention with the protective cap which extends
`¦ over the dispenser head shown in dot-dash line;
`l
'~ Fig. 2 is a vertical section through the dispenser with
~j interior parts only partially also shown in section;
Fig. 3 shows the outer housing, developed as tubular
housing, by itself in perspective;
Fig. 4 shows the insert by itself in perspective;
Fig. 5 shows the protective cap in an individual
perspective view;
-7-
. .
Fig. 6 shows the cartridge bag which is to be filled
with the product to be dispensed, together with an adapter
and headpiece, in an exploded view;
Fig. 7 shows, also in an exploded view, the transport
device insofar as it concerns the pressing plate and the
abutment plates, in position of readiness for assembly by
plug mounting;
,
Fig. 8 shows the lower portion of the dispenser in
; vertical section, in an enlarged view, showing the basic
. .
position of the transport unit;
Fig. 9 is an identical view shown in the actuation
, position with the lower abutment plate rising;
Fig~ 10 is a view similar to Fig. 8, but showing the new
basic position;
Fig. 11 is a cross section along the line XI-XI of Fig.
~ 1
8;
Fig. 12 is a cross section along the line XII-XII of
Fig. 9;
" "
!.",' Fig. 13 is a cross section along the line XIII-XIII of
Fig. 8;
; Fig. 14 is a cross section corresponding to Fig. 13, but
` in the position in which the detent tongues of the abutment
plate are in engagement with the tooth gaps of the rack
strips;
~; Fig. 15 is a cross section along the line XV-XV of Fig.
! 8, with the detent tongues out of engagement;
: .
Fig. 16 is a similar view with the detent tongues in
:.
-8-
''':;
203017~
detent engagement with the rack strips;
Fig. 17 is a perspective view of the two abutment plates
clip-attached to each other over the ram, with the lift
fingers in basic position; and
Fig. 18 is a similar view with the lift fingers brought
into active position (the last two figures are free-hand
sketches).
The dispenser Sp shown in the drawing and which
incorporates the device of the invention serves, for
instanse, for the dispensing of the paste composition 1 which
is contained in an elongated tube-like bag cartridge 2.
After the emptying of the bag cartridge 2, which is formed of
collapsible material, for instance plastic foil, and its
removal, a new bag cartridge 2 can be inserted into the
dispenser Sp. Its introduction is effected from the upper
end of the dispenser Sp, which is developed as a standing
unit. On its bottom the dispenser is opened to a cross
sectional extent which is less than the diameter of the fully
:-.
filled bag cartridge 2.
Components of the dispenser Sp are an outer housing,
designated by the tubular housing 3, and an insert 4 which
can be incorporated therein. This insert has a contour which
is adapted to the cylindrical tubular shape and it rests
radially against the inner wall surface 3' of the tubular
housing 3. The insert 4 is inserted from above and
terminates at the bottom at the most in the same plane as the
front end of the tubular housing 8 there which forms a
standing rim 5. In order to leave sufficient depth of
standing rim, the bottom of the insert 4 is preferably set
.
back somewhat inwards.
The standing surface, for instance a bracket for the
2030~76
;
dispenser Sp, is designated 6.
A section of the insert 4 which forms a turnable rim 8
extends radially as well as axially over the upper front end
of the tubular housing 3. Its outer surface can be roughened
by longitudinal grooves 9, as indicated in Fig. 3. The axial
protrusion of the turnable rim 8 corresponds approximately to
the width of one's finger.
As can be noted from Fig. 2, the turnable rim 8 is
brought by an outward directed wall offset of the tubular
wall of the insert 4 to a plane such that the outer surface
,;~ of the turnable rim 4 is aligned with that of the tubular
housing 3. By this wall offset, there is obtained a shoulder
10 which rests on the corresponding flat surface of the front
end 7.
As can be clearly noted from Fig. 3, the turnable rim 8
f''.' has four fingers ll produced by free-cutting from thei : :
cylindrically curved wall and arranged at equal angles apart.
, Each of the fingers is provided at its front end with an
inward directed detent projection 12. These projections grip
over a guide collar 13 of a relatively stiff headpiece 14
,~ which forms the upper closure of the cartridge bag 2. This
,::, .
,; headpiece, which is guided in the dispenser Sp or insert 4,
~. .
'i, is continued upwards in a spout 15 which rises upward towards
~ the side (see Fig. 6). At least the guide collar 13 is of
.
~ cylindrical shape. The mating detent surface for the detent
i projections 12 is an annular shoulder 18 produced by wall
` offset.
Referring to Fig. 6, it can be noted that the cartridge
bag 2 can be attached by an adapter 19 to the headpiece 14.
The adapter 19 has a downward directed push-on collar 20 for
the upper edge 2' of the cartridge bag 2. At the top, a
. .
1 0--
.:
2030~L 7~
connection socket 21 extends from said adapter 19, it being
adapted to be attached firmly with a corresponding mating
insertion part of the headpiece.
The bottom 2 " of the cartridge bag 2 forms a dome-
shaped closure. The paste composition 1 which is surrounded
by the wall of the cartridge bag 2 and the headpiece 14, when
fully filled, has a high stability of its own or stiffness.
The top of the cap-shaped headpiece 14 which forms a
manipulator H is developed as an actuating surface 22. This
surface is arranged essentially in the central region of the
headp~ece 14.
All of this, when not in use, is covered by a protective
cap 23 which passes at the bottom into an insertion-holding
collar 23~.
The dispensing of the paste composition 1 through the
delivery opening 16 is effected by means of a pressing plate
24. The latter is part of a transport unit T which can be
displaced from the bottom region of the dispenser Sp stepwise
in the delivery direction x. This transport unit T includes,
` 1 :
in addition to said pressing plate 24, also an upper abutment
plate I and a lower abutment plate II, as well as a pair of
J rack strips 25, 26. Two diametrically opposite detent
tongues rest against the latter in such a manner that the
transport unit T can, in condition of tooth-gap engagement,
be displaced only in the direction indicated by the arrow x.
~ The detent tongues of the upper abutment plate I are
!;` ~ degignat-d27~ and those of the lower abutment plate II 28.
They extend diametrically opposite each other on the abutment
plates I, II respectively, which are substantially of
circular cross section. on basis of an axial arrangement of
, ~1
the abutment plates I and II with free space between them,
;.1
,,
~, --11--
t
20301 76
the tooth-gap engagement takes place accordingly at different
heights.
The corresponding rack strips 25, 26 are developed on
the insert 4. Each of them, seen in cross section, extends
over 90, with adaptation to the course of curvature of the
cylindrical tubular housing 3. The rack strips 25, 26 which
are also arranged diametrically opposite each other, commence
in the region of the shoulder 10 of the insert 4 and extend
substantially over the entire axial length of the dispenser
Sp. The detent tongues 27, 28 are of a structure similar to
the teeth of a comb. Their individual teeth are plate-
shaped. They point in the direction of the standing surface
6 and each of them extends from a downwardly bent or
:~
vertically directed rim 27' or 28', which is continuous in
circumferential direction, of the abutment plates I and II,
respectively. The length of the detent tongues 27, 28
measured in axial direction corresponds approximately to
twice the height of the rim 27' and 28', respectively. This
structure can be noted particularly clearly from Fig. 7. The
gaps between the teeth bear the reference number 29. The
lower half of the length of the detent tongues is bent
slightly obliquely outward.
The teeth of the rack strips 25, 26 are of sawtooth
structure so that they present a flank which is oriented
substantially transverse to the longitudinal center axis y-y
of the dispenser Sp and an upwardly directed oblique flank.
In the region close to the bottom, the rack strips 25,
26 are connected to each other by an end ring 30 of the
insert 4. The latter commences on the inside of the rack
strips so that its outside diameter remains directed radially
inward clearly behind the rack strips.
'
-12-
2~31~
For the connecting of the two abutment plates I, II to
each other, a centrally located axially directed bushing 31
extends from the upper abutment plate (I). Said bushing
passes through a guide collar 32 on the lower abutment plate
II. The guide collar faces upward. Lift fingers 33
extend from the lower end of the bushing 31. Said fingers
engage below the horizontal-surface bottom of the lower
abutment plate II. These are double-arm elements which are
developed directly on the lower abutment plate II. The
supporting of the lift fingers 33 takes place in the region
of the bushing wall in the manner that the one, the inner arm
!.~
a of the lift fingers 33 extends into the cross sectional
region of the hollow of the bushing 31, and the other, the
outwardly extending arm k lies below the annular surface part
of the lower abutment plate. As a whole, there are four lift
i
~ fingers 33 which are arranged at the same angle and, in basic
, .
- position, extend substantially horizontally.
The inwardly extending shorter arms a of the lift
fingers 33 lie within the field of action of a ram 34 which
is guided displaceably with axial limitation within the
hollow of the bushing 31. The ram is an integral component
`; of the pressing plate 24. It passes from the bottom of said
::
pressing plate and in basic position its lower, dome-shaped
end extends up to approximately the plane of the bottom of
the lower abutment plate II. The dome against which the
corresponding surfaces of the inwardly directed arms a of the
lift fingers 33 rest is designated 34'.
The individual lift fingers 33 are developed, via, in
each case, a joint-forming film hinge 35, on the lower edge
of the bushing. The film hinges 35 are recessed somewhat
with respect to the lower front edge 31' of the bushing. To
:.
~ -13-
2030176
the right and left of the zone forming the film hinge 35 or
the articulation place, there are axially oriented parallel
free-cut slots 36. In this way the lift fingers 33 lie
practically over the entire cross section in radially
oriented shafts so that there is an advantageous guidance and
lateral support of the lift fingers 33 on the body of the
.,
bushing.
For the axial passage of the lift fingers 33 through the
' plate surface of the lower abutment plate II, as required for
!-.
assembly, the latter has passage openings 37 of corresponding
contour which also cover the guide collar 32. It is
therefore merely necessary to bring about the congruent
position of the crisscross lift fingers 33 and openings of
the passage opening 37 in order, by then turning by about
90, to arrive at a bayonet-closure-like assembling of the
two parts.
This position of attachment is secured by slide blocks
40 formed on the periphery of the two abutment plates I, II
and extending beyond the plate outside diameter. These
blocks are in each case diametrically opposite each other,
and, after reaching the bayonet-closure position, assume a
position with respect to each other in which they both lie on
a straight line one above the other. This is also at the
same time precisely the arrangement-correct profiling of the
transport unit T for introduction into the dispenser housing
(tubular housing 3/insert 4~. The corresponding slot guide
for the slide blocks 40 is developed in the form of two rail
guides 38 which are also arranged diametrically opposite each
other. These rail guides are located on the inner wall
~. .
~; surface 3' of the tubular housing 3. The rail guides 38
extend three-dimensionally parallel to the longitudinal
-14-
. .; .
~ 2~3~175
center axis y-y of the dispenser sp. There are concerned
simply two ribs 39, for instance developed thereon, which
form a guide unit, said ribs having at most the radial
thickness of the rack strips 25, 26. The inner surface of
said ribs 39 terminates in front of the outer narrow edge 30'
of the end ring 30.
The axial holding together of the two abutment plates I,
II is obtained by a snap-button like clip attachment between
the inward extending arms a of the lift fingers 33 and a
mushroom-head pin 41 (see Fig. 8). The shank of the
mushroom-head pin passes freely through the hollow region
left between the ends of the arms a. The mushroom edge grips
over the bottom of the heads of the four inwardly directed
arms a. The pin 41 extends centrally downwards from the
highest point of the dome 34' of the ram 34.
The two abutment plates I, II are urged by spring in
opposite directions, so that the lower abutment plate II is
."
~ held at the greatest possible distance from the upper
~ . .
abutment plate, supported by the lift fingers 33 and the pin
41 or the dome 34' on which the inner arms a rest, as well as
on the lower mushroom edge. The corresponding spreading
spring can consist of a coil compression spring placed over
the bushing 31. In the embodiment shown, however, there is
preferred a solution in which strap-shaped spring elements 43
for the spreading apart of the abutment plates I, II are
provided in the annular space 42 surrounding the bushing 31.
The spring elements 43 find a protective spring chamber
between it, in any event, by corresponding axial overhang of
the plate over the bushing. Specifically, the spring
elements 43 are developed as spring tongues ascending in
circumferential direction following the curvature of the
-15-
. .,
2030176
dispenser wall which are developed on the one abutment plate.
In the embodiment shown, the spring elements extend from the
lower abutment plate II, at a sufficient distance from the
periphery of the plate in such a manner that they still pass
behind the rim 27' of the upper annular plate and find at the
top a closed annular supporting shoulder.
In the fully spread position which the transport unit T
assumes in its basic position, both abutment plates are at an
axial distance from each other equal to approximately three
full tooth-gap spacings. This free stroke passage is
designated z (and could even be smaller, for instance extend
over only one tooth spacing).
The transport device also leaves an approximately
corresponding axial distance between the top of the upper
abutment plate I and the bottom of the pressing plate 24.
The lower edge of the guide collar 13 takes up the same axial
distance for the inner step 44 of the insert 4 produced by
wall offset.
On basis of the window-like, longitudinally oriented
free space (window 50) left between the rack strips 25, 26,
the transport unit T consisting of pressing plate 24 and the
abutment plates I, II can be turned, with stroke limitation,
within the tubular housing 3 together with the insert 4
having the rack strips 25, 26 in such a manner that the rack
strips 25, 26 can swing completely out of the region of the
detent tongues 27, 28 so as to obtain free return movement of
the transport unit T opposite the blocking direction of the
teeth. This is effected simply by grasping the turnable rim
,.:
8. In order to make the instantaneous position also apparent
to the user, two marks, 45 and 46, are provided on the outer
wall of the tubular housing 3 (see Fig. 1). A counter mark
'"
-16-
2~30~7~
47 is present opposite them on the moveable part, namely the
turnable rim 8. If this counter mark 47 is brought into
alignment with the mark 45, then the position of readiness of
:
the dispenser is present; on the other hand, if the counter
mark 47 is brought into linear alignment with the mark 46 by
the turning of the insert 4, then the dispenser can be
filled.
The corresponding end positions are not only stop-
limited in the manner that the narrow edges of the rack
strips 25, 26 travel against one or the other side of the
ribs 39 which extend into the window 50, but rather, at the
:~, ~
; same time, there is a perceptible securing of these end
b.~ ~ positions in the manner that a member of the tubular housing
3 which serves as detent pin and at the same time as locking
.,. :,
pin 48 cooperates with the above-mentioned end ring 30 of the
insert 4. Reference is had to Figs. 13 and 14. There, the
said locking pin 48 extends from the inside of the tubular
~' housing 3 directed radially to the center. It grips over the
! ~ section of the end ring 30 which is clamped in bridge-like
manner freely between the rack strips 25, 26, the end ring
having corresponding spring properties. The gripping side
j ~
30'' of the end ring 30 which faces the headpiece 14 forms,
within the region of the angle-of-rotation section of the
insert 4, two detent troughs 49 for the entrance of the
1 . ~
I; locking pin in the corresponding end position of rotation of
. . ;, , .
; the insert 4. The detent troughs are transversely rounded
:~. ,
grooves the bore center axis of which still lies somewhat
above the plane of the over-grip surface 30 " so that
excessively hard blockings do not occur. The locking pin 48
can, when developed integral, be made so flexible that it can
be pressed substantially into snap engagement behind the
,
'
-17-
~ ~ .
. . .
203~fi
grip-over side 30''. On the other hand, however, an
attachment of the locking pin 48 by thread attachment is also
possible in the manner that it is simply screwed through a
corresponding threaded bore in the tubular housing 3.
The operation of the device of the dispenser is as
follows:
By exerting a pressure force in the direction indicated
by arrow P, the top headpiece 14 is displaced opposite the
direction of the arrow x. The paste composition 1 comes
under pressure since the fully filled cartridge bag 2 rests
against the pressing plate 34 as against an abutment. It (1)
emerges, shaped as a strand through the delivery opening 16.
When a given pressure threshold is reached, the resistance
collapses. The pressing plate 24 is now moved downward over
the filling column of the cartridge bag 2. Its ram 34 moves
downward, guided in the bushing 31. The upper abutment plate
I rests still via its detent tongues 27 against the
stationary toothing of the rack strips 25, 26. The lower
abutment plate II, on the other hand, is displaced against
the direction of the spring load in direction of delivery
with further cocking or loading of the spreading spring
(spring element 43). It approaches the supported upper
abutment plate I, for instance with utilization of a partial-
stroke section of the stroke free path z or with full use of
said stroke free path z. Upon this downward movement of the
ram 31, the lift fingers 33 are namely swung around their
articulation axis. This has the result, due to the double-
arm nature and the conditions of attachment, that the outward
pointing arms 6 lift the lower abutment plate II. We have
the situation shown in Fig. 9. The detent tongues 28 of the
lower abutment plate II now hook in the higher plane. If the
'~
-18-
2030176
,: ..
.....
f',
~ pressure load is now removed from the headpiece 14, then a
`:~
continuous lifting of the upper abutment part I takes place
due to the force of the spring elements 43 with the carrying
alonq of the pressing plate 24 and the lifting of the bag
cartridge into the delivery position. The upper abutment
plate I now, in its turn, enters into the hooking with the
rack strips 25, 26.
If the transport device T comes into the region close to
the headpiece with corresponding emptying of the cartridge
bag, then only an idle actuation is still obtained. The user
now need only pull the emptied cartridge bag out of the
.i,
dispenser by grasping the headpiece 14 and overcoming the
,;
-l~ detent projections 12. By turning the turnable part 8 in
1 such a manner that counter mark 47 and mark 46 are opposite
....
each other, the abutment plates I, II have emerged from the
field of action of the rack strips 25, 26. The detent
tongues 27, 28 lose their support. They lie in the region of
the window SO left between the rack strips 25, 26. The
transport unit T slides as a result of gravity back into the
starting position. After insertion of a new cartridge bag 2,
the dispenser is again ready for use.
It should further be added that the development of the
lift fingers by injection molding is facilitated insofar as
core parts~can pass through windows SO of the uppor abutment
plate I. These windows 51 are so dimensioned that sufficient
spring abutment surface for the spring elements 43 is still
prosent in the edge region.
The solid development of tho ram 34 shown in the section
views of Fig. lS and Fig. 1~ has not been adopted in actual
practlce in order to save material; rather, this ram 34 is
hollow. Reference is had to Fig. 7, where two parallel
~':`',
19-
.
.,~, , .
i. .
203017~
shafts open from the top remain, they resulting in a
satisfactorily thin wall, possibly leaving inbetween a
continuous axially aligned partition 52 which extends up into
the head of the dome 34'.
The upper side of the pressing plate 24 is continued
further upwards into a dome-shaped development 53 which
pushes itself into the flexible bottom of the bag 2, and in
the final delivery position, favors a delivery of the paste
composition 1 which is substantially free of loss.
The rail guides 34 are closed at the bottom.
The features of the invention which are disclosed in the
above specification, drawing and claims may be of importance
for the reduction to practice of the invention both
individually and in any desired combination. All features
disclosed are essential to the invention. There is herewith
incorporated in the disclosure of the application also the
entire disclosure of the corresponding/accompanying priority
; papers (copy of the prior application).
~.'
,
:
-20-
~.
. .
