Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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Back~rou~ld of the~Invent~.on
The present invention relates to a ball point pen
writing instrument, and more particularl.y to a ball polnt
pen writing instrument simply using common aqueous ink as
its writing mediumO
Although the conventional ball point pen has the
advantages of convenience, handy, inexpensive etcO however,
it still has several disadvantages practical application
sùch as, easy leaking, frequent build-up of a ma~s of ink
at the pen point during writing, making the written words
very hard to identify, and staining on paper and on arms
by the ink; frequently a phenomenon of non-continuous flow
of ink during writing in Winter time; the words written
with it easy to diffuse and blur after a pe~iod of time
1~ unable to make important documents for a long~term keeping.
In view of these disadvantages of conventional ball
point pens mentioned above, all the important documents or
.matters oL great concern rely on the fountain pens as writing
instruments, because the words written with a fountain pen
are clear, remain not blurout very long, and have no pheno-
menon of discontinuous ink~s flow. However, there are still
di~advantage~ such as, unable to write in any optional direc-
t:ion, pen point easy to split and difficult to duplicate,
~harpne~s of its pen point easy to damage the writing paper,
?5 ~he capillary in.k volume from the pen point not always in
the ideal conditions when writing in some soft papers easy
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to diffu~e, and~ its high cost for making pen point and not
lon~ lasting tooO
On the market of various writing instruments, there
are some kind of sigrlature pens using rolling ball as writing
pen point such as, "Sheaffer", "Ball Pentel", etc. have bee~
introduced~ As these instruments possess the advantagesofboth
ball point pens and fountain pens to a certain extent, which-is
capable to fulfill the requirements of the market demand, and
becomes the favorites of the market of writing instrument for
quite some time. The space behind of ink guiding fibers,which
can achieve the writing purpose by means of a special quick-
drying semi-oily ink with good osmotic property,conveyed by
said core rod with'its capillary tube effect~ After the ink
is exhausted the general users cannot refill by themselves,
1~ and/or if the cap is not closed tightly or the pen is laid down
for a longer time, the writing medium will be dried out. If
'the semi-oily ink is switched to the simply aqueous ink for
an ordinary fountain pens, the passage of said core rod of ink-
guiding fibers will be soon blocked and the pen ~an not be
used again. It is regretful to state that the signature pen
with ball point has not em'bodied fully the advantages of both
ball point pens and fountain pens.
Therefore, it is understood that the conventional writ-
in~ instruments still have many unavoidable disadvantages.
Some improvements are obviously needO
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Summary of the Invention
Hence, the primary object of the present invention is to
effect improvements on the vario~us disadvantagesof conventional
ball point pens, fountai.n p Ts and signature ball point pens,
and provide further a novel ball point writing instrument capa-
ble of utilizing the ordinary aqueous ink for general fountain
pens and fitted with a ball point in possession of both advan-
tages of fountain pens and ball point pensO
Another object of the pre6ent invention is to provide a
ball point writing instrument, in which, the end of a ink-guid-
ing capillary guides near the ball point is shaped as a slim
tip, and a considerable space is reserved between the inner
walls of pen holder, making space entirely usable for storing
ink so as to keep the ink stock to a maximom extent, thus,
regardlessof how long the writing instrument, according to the
present invention, is laid down or how much the ambient tempe-
rature fluctuates, the ball point can be used successfully to
write smoothly.
Still another object of the pre~ent invention is to
provide a ball point writing instrument, wherein a ~pace is
re~erved at the portion above a pen point in the pen holder,
and extended :into the body of the capillary tubes ink-guiding
member so as to equalize of the inside and outside pressures
of the pen holder, thus , regardles~ of rise or fall of the
atmospheric pressure the pen point according to the present
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invent:ion can be~very long lastin~ to the ~mooth wri-ting.
Brief Description o the Drawirlgs
The above and other objects, features and advantages
of the present invention will be more apparent from the
following descriptions.in conjunction with the accompanying
drawings, wherein:
Fig. 1 i~s a longitudinal cross-section view of one
embodiment according to the present invention;
Fig. 2A is a front perspective view of one embodlment
of the capillary ink guide of the present invention;
Fi~. 2B is a rear perspective view of Fig~,2A;
Fi~. 2C is a front perspective vlew of second embodi-
ment of the capillary ink gulde of the present invention;
Fig. 2D is a front perspective view of third embodi-
ment of the capillary ink guide of the present invention;
Fig. 3A is a longitudinal cross-section view of the ball
point of the present invention;
Fig. 3B is a right side view of Fig~ 3A;
Figs. 3C and 3D are cross-section views of the other
suitable forms of the ball point of the present invention;
Fi~. 4 is a perspective view of a pen point cover of the
present invention.
-Detailed ~escription of the Drawings
'~iior to proceeding the description of the present inven
-tion,it should be noted that the similaror corresponding parts
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in various embodimerlt6 according -to the~ present invention are
coded with same number ~or the convenience of cross referencq;
besid~_, the pen cap and the ink-storing de~ice to be u~ed in
the presqnt invention are of conventional construction and its
relevant description,s are therefore omi.tted.
As shown in the figures the ball point writing instru-
ment according to -the present invention con,sists mainly of a
ball point 10, a caplllary tubes ink-guiding member 20 closely
contact with the rear end of said ball point 10, an anti-leak
packirlg ~0 and an ink-stori.ng tube 50 overslipped at the rear
end of said member 20, a ball point cover 40 support-ing the
ball point 10 and connected to the front end of A pen holder
30, the pen holder 30 compc,sed of a front half section 31 and
a rear half section 3}, and an adapter 32 fitted between the
packing ~0 and the ink-storing tube 50 and joining the front
half section 31 and the rear half section 33 togetherO The
rnost important members according to the present invention
includ~ the ball point 10 and the capillary tubes ink-guiding
member 20 as shown ln Fi.gs. 2 and 3.
The ball point 10 of the present i.nvention comprises a
pen-point housing 12, a rolling ball 11 fitted in the pointed
end of ~aid housing 12, and a capillary pen core 13 inserted
:i.nto s.aid housing 12. -[t should be emphasized that said capi-
ll.ary tubes pen core 13 and said pen-po:Lnt housing 12 are held
,~5 me.re:Ly by the two lateral faces of a rectangul.ar body 131, the
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cross section o~ said perl core 13 may ~e forrncd in-to a tri-
angular or a cro~-sllaped body as shown in Figs 3C and 3D;
a cons-~?erable space 120-120 is reserved between the inner
walls of said pen core 13 and said housing 12 a~ ~hown in
Fig. 3B, and the front end of said pen core 13 shown in
Figo 3A is diminished into a slim ink-guiding tip 1~0; there
is a slight contacting or a gap of miniature space between
the tip 130 of said pen core 13 and the rolling ball 11u
The effect of contacting Ol' not in contacting will determine
the fineness of letters or words written, for example, if it
is desired to write fine and small words, both with miniature
gap should be chosenO
In additionO the space 120A reserved between the slim
tip 130 of the front half of said capillary tube pen core 13
and the housir~g 1~ is much larger than the space 120 in order
to enable said 120A to s-tore a l~rge amount of ink, making
the writing i,nstrument according to the present invention
capabl~ of writing smoothly, even it is being laid down for
a period of time~ Si,nce, the large amount of ink stored in
~ fiaid space 1~0A is ,sufficient to rewet and dissolve the ink
residue, forrned by oxidation and deposition at the ball point
due to laying-down too :Long. Therefore, the writing instru-
ment of the present inve~ntion can be used under any circums-
tan(l-,s and hal the feature of sustainlng a smooth writing from
khe b~ginrling to the erld, a fac-t never reali,~.cd by using the
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conv6nl.ional b~l]. polnt pens, fountain penæ and signature
pensO This new development with technical breakthrough
re~sults in a very satisfactory writing effect.
Another important feature according to the present
invention is the ink-guiding member 20, which includes a
body having several pieces of numerous ri.ng-shaped capillary
tubes fins 23 and a ring-shaped groove 22 cut slightly near
the front said body, the front and rearsmaller diameter
portions 21,26 ex-tended forward and backward respectively,
fromsaid body at the center of longitudinal lateral face and
a longitudinal hole 28 perforated and extended from said rear
smaller diameter portion into t;he middle of said body in which
an ink-guiding core rod 29 is inserted ( see Fig~ 1 ). The
front smaller diameter portion 21 is in close contact with the
rear end 131 of said ball point pen 10, which provides two
functiuns, namely i-t serves as a support point for the force
of act.ion durir1g writing, and as a capillaxy tube guide groove
for both the pen point and said body. In order to further
smooth the guidance and feed of ink, at l.east one longitudinal
capillary tubes gui.de grooves 24-, 25 are particularly cut on
the outer surface of said member 20 and the front smaller dia-
meter portion 21, said guide grooves 21+, 25 are fuxther commu-
ni.cated with said ho1e 28 by cutting into t;he body through the
m:i.dd].o E)ort-i.on therf)ofO It :i~3 preferable th.lt on the foremo~-t
;~ f3nd fa(o of the front .smal].er diameter portion 21 may fuxther
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cut at least one diame~triccll capillary tubes guide ~rooves
(as ~shown in Fig. 2C) so as to have them communicate with
the guide grooves 2l~,25 mutually, but the depth of ~hem
in the joining face should be not too deep only to achieve
some capillary tube effect. Furthermore, one long longi-
tudinal groove 27 is cut in the outer surface of sai~ body
at the opposite side of the diameter of said two guide
grooves 24, 25 from a slightly rear end of the body 20
throu~h the outer .surface of the entire length of the front
smaller diameter portion 21, said groove 27 being connected
with the air vents 1~1 in the pen cover 31 and jointly con-
stituting a venting passage of the writing instrument of the
present invention wlth the space in said pen cover 31 to
facilitate the equalizing o:f pressure in the pen holder sur-
rounding atmospheric pressure at all times and locations,
and therefore, at any circumstances, ink will be never
accumu].ated in the vent-i.ng passage, making the writing ins-
trument of the present invention has no influences on its
excessive or defficient ink output due -to the fluctuations
~0 of the ambient pressure regard]ess of writing in fly-high
ai.rplanes or dive-deep ;ubmarines~ This is one of the most
prominent feature of application to ~ny different environments.
The applicant had discovered through many experiments
that, owing to a lar@e amount of ink is stored in the inner
;pace 120, 120A of the pen point of the present invention, the
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plural-i.ty of fi.~1s~ 23 cut on ~said body may be omi.tted, a.s shown
in Fi~. 2C, on:Ly the lon~itudinal capi~.lary tubes guide ~rooves
24, 25 are reserved to also achieve~ a practically same effect
~ the construction mentiont?d abo~e. ~f nece~sary, at least
more than one gui.de g:rooves may be further ad~ed onto the outer
surface of said ink guiding member 20 ( not shown ) to enhance
its capi].lary tube ink-g~uiding function. This paragraph ex-
plains adequately the ink-guidin~ member 20 of the present
invention dif~ering to the ink-storing capillary tube effect
of ordinary fountain perls and thcrefore, it is feasible to
consider as another embodiment of the ink-guiding member 20
(? f the invention.
It i~ to be understood that the capillary tube pen
core 13 may be formed integrally with the foremo6t end of
1~ said l.nk-guiding rnem'ber 20, as shown in Fi~ 2~, in this
manner, the capi].lary tube guide grooves 24, 25 may be also
cxtended to t'he tip polnt of~ said pen core 130
It should be further emphasized that, in order to dis-
play the functions of -.ink-guiding member 20 of the present
i0 i.nventi.on to -the ex1;remes and to comple-tely prevent the ink
frorn leaki.ng, the oute:r surf'ace of the ink-gu:Ld-.ing rnember 20
should be preferably matched closely with the inner wall of
the pen holder, ~md at the front end of the rear smaller dia-
meter portlon 26 of sai.d member 20 a packing 60 is over-~lipped
, rrlaking the adapte:r -$i' thread in the rear end of' the front
g
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half sectlon 3~ caab].e o r preverltirlg the ink in the storing
tube '~0 from 1eak~ ;O In addition, the outer surface of ink-
gu.i.ding member ~0 mat;ched closely with the inner walls of
the pen holder wil.l further provide a very effective capillary
tube effect for the writing instrument of this invention.
As shown in Figs. 1 and ~t, the pen point 10 is held
tight by the f'ront end of the pen cover 40 which is threaded
onto the front half section 31 of the pen holder 30.
A plurality of grooves L~1 are cut at the inner wall
of the pen cover L~O so that more than one vents are cons-
tituted be-tween said ~rooves 41 and the outer wall of the
pen-point to equalize the air pref;sures of inside and out-
side the pen holder, and they also serve as ~ suction holes
of ink during refillO
It will be appreciated that t'he above description
of the em'bodiments are illustrati-ve only and numerous modi-
fications and variations may be made in light of the above
teachings. It is therefore to be understood that within the
scope of -the appended claims, the invention may be practiced
otherwi.se than as specifi.cally described hereinO
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