Note: Descriptions are shown in the official language in which they were submitted.
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The present invention rela-tes to a writing instrument
and more particularly, to a writing instrument having manually
separable parts of nib and pen holder so that either new nibs
or different pen point gauges can be arbitrarily changed.
Conventional writing instrumen-ts, such as cellulose~
nib or ball-nib pens for use in signing have a fixed or all-
in-one part of the nib and pen holder because of favorable pro-
duction in the assembly line. Therefore, it is impossible to
separate nib from pen holder without proper tools or without
destruction. Once the nib is broken or worn out, the whole
pen must be discarded even if the pen holder is still in a
good condition.
Further as the gauge or the fineness of a conventional
writing instrument is fixed, several writing instruments must
be provided for different purposes, such as for engineering
drawing or for signatures.
The present invention provides a writing instrument
with a replaceable pen-nib, to enable the full use of pen holder
or the other parts which is only necessary to replace the
damaged parts.
The present invention also provides writing instrument
having a spare pen-nib in the pen holder thereof which is im-
mediately replaceable as soon as the operative pen-nib is worn
out or damaged, which assures no interruption of writing on
important occasions, i.e. dictating letters, attending impor-
tant press conferences or in examinations.
The present invention further provides a writing
instrument with a series of spare pen-nibs of different gauges
present in its pen holder for different requirements on dif-
ferent occasions, so one has satisfaction by using a writinginstrument for all purposes.
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According to the present invention there is provided
a replaceable nib writing instrument comprising a pen casing,
a pen-nib holding means connected at the front of said casing,
a pen-nib adapted to use an ink solution held inside said hold-
ing means, an ink storage means located at the rear of said
casing, an ink guiding means connected between said pen-nib
and ink storage means to convey the ink from said ink storage
means to the pen-nib~ said ink guiding means including a capil-
lary member having at least one longitudinal capillary groove
on its outer surface, and an ink guiding core for transfering
ink from said capillary member to said pen-nib, said capillary
member and said ink guiding core being mounted in face-to-face
abutment, the abutting face of said capillary member being pro-
vided with at least one capillary groove which communicates
with said longitudinal capillary groove, whereby said pen-nib
may be interchanged therewith.
The present invention will be further illustrated,
by way of the accompanying drawings, in which:-
Fig. 1 is a partly cross sectional view of a writing
instrument according to one embodiment of the present invention;
Fig. 2A is a perspective view of the first embodiment
of the capillary ink guide of the writing instrument of this
invention;
Fig. 2B is a perspective view of the second embodiment
of the capillary ink guide of the writing instrument of this
invention;
Fig. 3A is a cross sectional view of pen-nib of a
writing instrument according to one embodiment of the present
invention;
Fig. 3B is a cross sectional view of another embodi-
ment of pen-nib of a writing instrument according to another
embodiment of the present invention;
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Fig. 4A is a perspective view of a pen-nib cover of
a writing instrument according to one embodiment o~ this inven-
tion;
Fig. 4B is a perspective view of a pen-nib cover of
a writing instrument according to another embodiment of this
inventionj
Fig. 5 is a partly sectional view of a writing instru-
ment according to another embodiment of the present invention;
Fig. 6A is a partial sectional view of a writing
instrument according to still another embodiment of the present
invention; and
Fig. 6B is a partial sectional view of a writing
instrument according to still another embodiment of the present
invention.
For the sake of easy cross references between the
description of each preferred embodiment of the present inven-
tion, the same reference number and affixed (when required) with
alphabetical capital letter is assigned.
In the replaceable pen-nib of the writing instrument
in this invention, the main structural improvement ~ncludes,
firstly, an optionally removable part between the front part
of pen holder and pen-nib, and secondly, an optionally replace-
able part in the rear part of the pen holder where spare pen-
nibs of different gauges may be stored.
The writing instrument of the present invention, as
shown in Fig. 1, comprises a ball pen-nib 10 which uses an
aqueous ink solution, a capillary type ink guiding element 20,
pen-nib cover 32, pen holder 30, ink storage cartridye 50,
adapter 40, and packing 60. The pen-nib 10 is held by an
adapter 40 and tightened by means of screwed-in pen-nib cover
32 to the pen holder 30.
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The construction of adapter 40 is shown in Fig. 4A.
Grippers 41-41 are an integral part of adapter A0. The front
screw ~2 of the flange 44 is screwed together with pen-nib
cover 32 and the rear screw 43 is fitted by screwing with the
front part of pen holder 30. The space 410 between grippers 41
and 41, enables the passage of air as well as ink flow.
On unscrewing the pen-nib cover 32, it is very easy
to remove pen-nib 10. By the reverse operation, the pen-nib 10
is tightened to the pen holder 30. When the pen-nib 10 is worn
out, a spare pen-nib 101 in the rear part of pen holder may
be taken out by unscrewing rear end cover 35 to replace the
worn out one.
The capillary type ink guiding element 20 may be as
in Fig. 2A or 2B. In Fig. 2A, a plurality of capillary type
grooves 24, 25 are cut in the outer surface of element 20 from
the middle larger diameter portion 23 to the front smaller
diameter portion 21 thereof. The pen-nib 10 contacting the
front end of the element 20 is as in Fig. 3A. In Fig. 2B the
capillary tube guiding core 131 in the pen-nib 10 is an integral
part of said ink guiding element 20 and thus the replaceable
pen-nib is as in Fig. 3B. In this manner, the type of the pen-
nibs stored in the rear part of the pen holder are changed
accordingly.
The capillary element 20 and ink guiding core 131 are
mounted in a relationship of face-to-face abutment as shown in
Fig. ~. On the closely abutting face of the capillary member
20 is formed one or more radial or crossed capillary grooves
which are extensions of the longitudinal capillary grooves 24,
25 on the outer surface of said capillary member 20, so as to
effectively enhance its capillary ink-guiding functlon and
enable the fitting of many different gauges of writing nib, for
example, a baJ1 point pen-nib 10 to induce the ink from said
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ink reservoir 50 ~lowing to the pen-nibs 10 mentioned above or
to replace thereof for writing. Since the capillar~ grooves
at the front end face of said capillary member 20 effectively
enhance the capillary function of conveying ink from the ink
reservoir 50, each of such different gauges of pen-nibs, after
being fitted on the pen holder 30, can be used for smooth and
fluent writing.
Another embodiment of the replaceable pen-nib of the
present invention is shown in Figs. 4B and 5. The pen-nib and
the pen-nib cover 32 are combinèd as a single unit and are fixed
on the front part of the pen holder 30 by being either slipped
on or screwed-on.
It is to be understood that the pen-nib cover 32, as
shown in Fig. 5, is screwed on the pen holder 30 while the
spare pen-nib 100 with its cover 320 is fixable by either being
slipped on or screwed-on to the rear part of the pen holder 30.
It will be appreciated that according to the present
invention, the replaceable nib writing instrument may also be
a signature pen using a semi-oily ink. As shown in Fig. 6A, a
conventional signature pen comprises an ink storing cellulosic
element 50A in the pen holder 30A, thus allowing passage of the
ink to pen-nib lOA through the ink guiding core 20. The writing
instrument of this kind commonly available in the market,
usually has an integral pen-nib cover and pen holder being cast
or formed together and fitted tightly to the front end of the
pen holder by force. This kind of construction is based upon
the convenience of manufacturing as well as assembling processes
instead of facilitating the replacement of parts, consequently,
it is not advisable to replace pen-nib by hand. In the replace-
able nib writing instrument of the present invention the pen-nib
cover has a structure 32A in Fig. ~A. The pen-nib cover 32A
has a length to be easily held by fingers and can be screwed
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on the front part of pen holder 30A. The pen holder 30~, as
usual, has an air equalizing hole 33. In this embodiment, pen-
nib lOA is fltted to the inside of pen-nib cover 32A, and the
front half of ink guiding core 20A is in turn closely held to
the inside of pen-nib lOA.
When replacing pen-nib lOA, all one has to do is to
unscrew the pen-nib cover 32A, the pen-nib lOA together with
the front half core 20A Will be separable from the pen holder
30A. Also, when screwing pen-nib cover 32A Gn the pen holder
30A, the frGnt half core 20A Will engage ~ith the main guiding
core 20 so as to have a smooth ink flowing effect by capillary
action.
The main ink guiding core 20 in the above mentioned
embodiment may be made in a single piece as shown in ~ig. 6B,
which will directly reach the pen-nib lOB. When unscrewing the
pen-nib cover 32B from pen holder 30B for replacement, only the
pen-nib lOB will be separated, leaving the guiding core 20B
e~tending from the pen holder. This kind of construction is
more favorable for the slip on type construction of the ink
20 storage cartridge 50B.
It is to be emphasized that according to the present
invention each of the ink guiding cores 20A and 20B also have
cut on the outer surface at least one longitudinal capillary
type groove 24, 25 to provide for smooth guidance and feeding
of ink.
In the same manner as set forth above cellulose pen-
nib may also be app]icable to the construction of pen-nib cover
of this invention instead of ball point pen-nib mentioned above.
