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Патент USA US3087473

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April 30, 1963
D. KAHN ETAI.
3,087,463
WRITING INSTRUMENTS '
Filed Feb. is, 1959
2 Sheets-Sheet 1
FIG.1
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BY
April 30, 1963
I
Filed Feb. 13, 1959
D. KAHN 51‘ Al.
3,087,463
WRITING INSTRUMENTS
2 Sheets-Sheet 2
United States Patent 0 " IC€
3,087,463
Patented Apr. 30, 1963
1
2
3,087,463
plug member which seals the forward open end of the
tubular holder.
WRITING INSTRUMENTS
David Kahn, deceased, late of Englewood Cliffs, N.J., by
Julius M. Kahn, Samuel Kahn, and Harry Yager, exec
utors, all of Englewood Cliffs, N.J.; and Karl Weisser,
deceased, late of Cresskiil, N.J., by Helen E. Weisser,
executrix, Cresskill, N .J., assignors to David Kahn, Inc.,
North Bergen, N.J., a corporation of New Jersey
Filed Feb. 13, 1959, Ser. No. 793,071
16 Claims. (Cl. 120—45.4)
As a modi?cation, the new ink cartridge also includes a
non-leakable assembly in which the pierceable or open
able partition is formed integral with the tubular body
of the cartridge and the open rear end of the tubular
body or ink-holder is closed by a plug including a bulged
portion, a circumferential ?ange and an annular sealing
projection extending forwardly of the circumferential
10
The present invention relates to writing instruments
flange and positioned inwardly of the outer periphery
thereof. The plug may be adhesively secured in position
and more particularly to the provision of an ink car
or it may be secured in position by means of a ferrule
or collar.
tridge which can be more easily and securely assembled
and which upon insertion into a appropriately formed
The invention will now be more fully described in
Writing instrument will automatically produce a self 15 conjunction with the accompanying drawing in which:
priming action to prepare the writing instrument for
FIG. 1 is a sectional elevational view showing a tubular
immediate use.
holder of an ink cartridge constructed in accordance with
the invention.
This application is a continuation-in-part of applica
FIG. 2 is a sectional elevational view showing a
tion Serial No. ‘619,585 ?led October 31, 1956 now
20 closure member for closing the open forward extremity of
abondoned.
the tubular holder of FIG. 1.
The present invention constitutes an improvement over
the replaceable cartridge containing writing instrument
FIG. 3 is a sectional elevational view of a metal
described in the copending application of Julius M.
ferrule prior to insertion thereof upon the tubular body
of the ink cartridge.
Kahn and Morris Levy, Serial No. 576,357, ?led April 5,
FIG. 4 is a partial sectional elevational view showing
1956, now Patent No. 2,964,012, granted December 13, 25
the closure member of FIG. 2 inserted into the open for
1960, ‘and the present invention is particularly adapted for
ward forward extremity of the tubular holder of FIG. 1
use in the writing instrument disclosed therein after the
ink cartridge and barrel of the said copending application
and with the ferrule of FIG. 3 in assembled position prior
to ?nal crimping of the ferrule.
are modi?ed in accordance with the present invention.
The present invention has as its primary purpose and 30
FIG. 5 is a sectional elevational view showing the ?lled
and completed ink cartridge after the ferrule has been
object to provide an ink cartridge and a cartridge-writing
instrument combination in which the cartridge is of
crimped to seal the closure member to the tubular holder.
FIG. 6 is a partial sectional elevational view showing
simpli?ed and unitary construction while enabling some
, the rear of the barrel of a writing instrument constructed
of the ink in the cartridge to be automatically discharged
when the cartridge is replaced so that, when the writing 35 in accordance with the invention with an ink cartridge
inserted therein, said cartridge being shown prior to the
instrument is reassembled and without precaution or
?nal assembly of the writing instrument at which point
additional operation, the empty instrument in which the
the automatic priming action of the invention takes
fresh cartridge is inserted will be primed with fresh ink
for immediate use.
place.
More particularly, the present invention includes an 40
FIG. 7 is a sectional elevational view of the complete
barrel of FIG. 6 with the pen section threaded home
therein to fully insert the cartridge in the barrel and
achieve the automatic priming action of the invention.
and barrel construction which permits the mere screwing
home ‘of the pen assembly unit shown in the above men
FIG. 8 is an exploded sectional view of a modi?ed form
tioned copending application to result in the automatic 4:5 of link cartridge constructed in accordance with the in
vention.
priming of the writing instrument.
The invent-ion includes the provision of an ink-car
FIG. 9 is an exploded view of a modi?ed form of the
' ink cartridge showing the cartridge in the process of as
tridge, as aforesaid, said cartridge being structurally
sembly.
adapted for rapid and efficient assembly to provide a non
50
leaking and unitary cartridge unit.
FIG. 10 is a vertical view of the assembled cartridge
of FIG. 9‘.
In accordance with the present invention, the rear
end of the cartridge is formed with a rearwardly extend
FIG. 11 is a sectional vertical view showing the ?lled
and completed ink cartridge of FIGS. 9‘ and 10.
ing deformable bulged portion, which is preferably thin
FIG. '12 is a rear end view of the feed bar of FIG. 7
so that it can be easily deformed, and this bulged portion
cooperates with a deforming member which is positioned 55 prior to insertion of the feed bar in the pen section.
Referring more particularly to the drawings, the tubular
at the rear of the cartridge receiving chamber in the bar
ink holder shown in FIG. 1 is generically denoted by the
rel. As a result of this novel structure, when the fresh
numeral 20 and is constituted by a tubular body 21 hav
cartridge is forced into the barrel during the assembling
openable or pierceable closure on the forward end of a
?lled tubular holder for ink and also includes a holder
ing a circumferential outwardly extending ?ange 22 at the
or re~assembling of the writing instrument, the bulged
rear end of the cartridge is forced against the deform~ 60 forward end thereof. The ?ange 22 is preferably under
cut as indicated at 23‘. The rear end of the tubular ink
ing member and is deformed thereby to increase the
holder 20 is closed by means of a deformable rearwardly
pressure within the cartridge and thereby force some of
extending bulged integral bottom portion 24. The ink
the ink out of the pierced or opened forward extremity
holder 20 is preferably molded in a single piece with the
of the cartridge to prime the writing instrument.
65 ?ange 22 and the bulged portion 24 ‘being ‘formed integral
The new ink cartridge also includes an improved non
with the tubular body 21. The tubular body 21 is pref~
leakable seal in which a metal ferrule or collar is crimped
erably of su?icient thickness to be reasonably rigid, e.g.
about aligned abutting circular shoulders on the forward
dimensionally stable.
end of the cartridge. These shoulders are constituted
The bulged portion 24 is preferably formed thinner
by a circumferential outwardly extending ?ange at the 70 than the body portion 21 to facilitate the ease of de
forward end of the tubular in-holder which abuts an out
forming this bulged portion. However, it is not es
wardly extending circumferential ?ange on the closure or
sential that the bulged portion 24 be thinner than the body
3,087,463
portion 21 since reasonable dimensional stability of the
ink holder 20 may be ‘achieved with walls of sufficient
?exibility to permit their being deformed by a vigorously
applied force exerted by a reasonably sharp instrumen
tality.
7
4
thereon. The rear of the barrel is vented by the bore 14a
in plug 14.
Referring again to FIG. 5, the forward end of the ink
cartridge is rimmed by the ferrule 28 which constitutes,
together with the supporting circumferential ?ange 22
and 26’, an external outwardly extending circumferential
Referring to FIG. 2, the closure member or plug ‘26
rib 25 and, as shown in FIG. 7, the interior of the barrel
is tubular and is provided with a centrally disposed out
10 is formed with a shoulder 15 positioned near the for
wardly extending circumferential ?ange 26'. The inner
ward extremity thereof. Shoulder 15 is dimensioned to
portion of the tubular closure or plug 26 is bridged by
a partition 27 which, .as shown in FIG. 2, is preferably 10 permit passages of the ink holder body portion 21 while
preventing passage of the rib 25. Accordingly, the ink
thinner at the peripheral margins thereof to facilitate
cartridge cannot be improperly inserted in the ‘barrel 10.
puncturing of the same, e.g. severing or opening of the
Fitted within the pen section 30 is a feed bar 40 and
portion 27 by means of a cylindrical piercing member.
a pen nib 50 is interposed between the pen section 36 and
The partition 27 is positioned to the rear of the forward
extremity of the closing plug 26 to provide an annular 15 the feed bar 40. The feed bar 40 includes a semi-cylin
drical (see FIG. 12) rearward extension 42. The feed
guide portion 27'. The ?ange 26’ is forwardly posi
bar 40 is provided with a plurality of longitudinal grooves
tioned along the length of the closing plug 26 to provide
48.
a circumferential wall 26" for insertion in the forward
Referring more particularly to the pen section 30, this
open extremity of the ink holder 26).
FIG. 3 shows a tubular metal ferrule '28 which is pro 20 pen section is symmetrically formed about the central
longitudinal axis 37 of the writing instrument. The pen
vided with an inwardly crimped portion 29 at one end
section 30 includes a rear portion 33 of reduced diameter,
thereof. As can be seen in FIG. 4, theferrule 28 is
the exterior of which is threaded at 31. The numeral 35
slipped over the ink holder 20 from the rearward end
designates the tubular piercing extension within which is
thereof and is moved upwardly until the crimped por
?tted
the rearward extension 42 of the feed bar 40. The
25
tion 29 engages the circumferential ?ange 22 of the ink
numeral 41 generically denotes an ink feed channel ex
holder 20. As will be observed with reference to FIG.
tending between the feed bar 40 and the interior of the
1, the crimped portion 29 preferably extends into the
pen section 30 and communicating between the lower end
undercut portion 23. As is also shown in FIG. 4, the
of the piercing extension 35 and the pen nib 50 to permit
crimped portion 29 of the ferrule 28 extends toward the
rear of the ink holder 20.
30 ink in the ink cartridge to ?ow to the nib 50 for use in
writing. The longitudinal grooves 48a form part of the
After the ink holder 20 has been ?lled with liquid
ink feed channel.
writing ?uid, e.g. ink, the plug or closure member 26
The pen section 30 with the feed bar 40 and the pen
is inserted into the open forward end of the body portion
nib 50 constitute a unitary assembly which is connected
21 until the circumferential ?ange 26’ of the plug or
closure member 26 is in ?rm engagement with the cir 35 with the barrel 10 by screwing home this unitary assem
bly utilizing the threads 31 in conjunction with the threads
cumferential ?ange 22 at the open forward extremity of
13 on the interior of the barrel.
the ink holder 20.
As the unitary assembly above referred to is screwed
Referring now to FIG. 5, the upper end of the ferrule
home
upon the barrel 10, the piercing extension 35 en
28 is crimped over upon the abutting circumferential
?anges 22 and 26' to form the crimped portion 29’ which 40 gages the partition 27 of the plug or closure member 26
and forces the cartridge rearwardly in the barrel 10 to
?nally seals the completed ink holder 24) to form the
completed ink cartridge.
Referring to FIG. 6, the rear of the ink holder 20 is
shown inserted within the tubular barrel 10 of a writing
instrument, e.g. a fountain pen. It will be observed that
a deforming member 16 has been secured toward the
rear of the barrel 10, the deforming member 16 being
urge the bulged portion 24 against the protuberance 17.
Finally, the extension 35 pierces the partition 27 and the
extension 35 moves rearwardly through the interior of
plug 26 until the rear face 33a of the reduced portion 33
of the pen section 30 bears against the forward extremity
of the ink cartridge, e.g. the plug 26. When the assembly
is now fully threaded home, the bulged portion 24 is
forced against the protuberance 17 which forces the por
deforming protuberance 17. This protuberance 17 en
24 to deform into substantially the shape shown in
gages the bulged portion 24 of the ink holder 20 and 50
. 7.
prevents the full insertion of the ink cartridge into the
As will be appreciated, the deformation above referred
barrel 10. The deforming member 16 is preferably bored,
to occurs while the extension 35 is immersed in the ink
as indicated at 18, to facilitate insertion and removal of
with the ink cartridge in sealing relation with the pen
the ink cartridge.
section. This reduces the volume of the cartridge while
FIG. 7 shows a completed writing instrument con 55 the cartridge is sealed and raises the pressure therein.
structed in accordance with the invention, the details of
More particularly, the extension 35 is in sealing engage
this writing instrument’ being more fully discussed in the
ment with the annular guide 27' of the plug 26. As a
aforementioned copending application.
result, the pressure in the ink cartridge is increased and
Referring more particularly to P16. 7, the ink holder
a small .amount of ink is forced out of the cartridge
20 is shown fully inserted Within the barrel 10 with the 60 through the ink feed chamber 41 where it reaches the
bulged portion 24 of the holder 20 forced against and
nib 50 to permit substantially immediate writing. The
deformed by the deforming protuberance 17 of the de
presence of the annular guide 27' thus contributes to the
forming member 16. As will be seen, the deforming
achievement of an effective self-priming action.
provided with a centrally disposed forwardly projecting
member 16 is secured within the barrel 10 against an
As can be seen in FIG. 8, a tubular ink holder 20'
abutting shuolder 11 which constitutes the rear of a 65 is provided with the upper end thereof closed by means of
cartridge receiving chamber which communicates with
an integrally formed openable or pierceable partition 27".
the open forward extremity of the barrel. The deforming
There is also formed integrally with the ink holder 20’, a
circumferential ?ange 25’ and an annular guide for the
member 16 may be glued in place.
The exterior of the forward portion of the barrel is 70 tubular extension 35, said annular guide being desig
nated by the numeral 27"’.
provided with a threaded portion 12 to which a conven
The lower open end of the ‘ink holder 20' is closed by
tional cap (not shown) can be secured and the interior of
means of a closing plug 51, the closing plug 51 including
the forward portion of the barrel is provided with a
a bulged portion 52, the rearwardmost portion of the
threaded portion 13 to which a pen section 30 is secured
bulged portion having a central thickened reinforcing
by means of the external threads 31 which are formed
5
3,087,463
portion 52a. The forward end of the closing plug 51 is
formed with an outwardly extending circumferential
flange 53 which is provided with an abutting shoulder 54,
the shoulder 54 bearing against the lower extremity of the
tubular ink holder 20’ when the closing plug 51 is in
sen-ted therein. The closing plug 51 also includes a for
are frozen. The tightening or crimping of the ferrule at
71 forces the cartridge into secure engagement with the
projection 65 of the plug and prevents leakage of ink from
the cartridge.
If desired, the cartridge of FIG. 11 may be provided
with a circumferential ?ange at the upper end thereof
‘similar to that shown at 25' in FIG. 8. On the other
bears against the interior of the lower extremity of the
band, if desired the ?ange 25' may be eliminated from the
tubular ink holder 20'. In this manner, a large surface
area is provided between the closing plug '51 and the lower 10 modi?cation of FIG. 8. It is evident that the ink holder
and plug of FIG. 11 may be utilized without the ferrule,
extremity of the tubular ink holder 20'. When this large
the plug ‘being secured in the ink holder in the same man
surface area is present, the liquid writing ?uid is effec
ner as the plug of \FIG. 8.
tively trapped Within the ink cartridge and when the clos
The ink cartridges of FIGS. 8-11 operate in the iden
ing plug 51 is secured to the tubular ink holder 20" either
tical
manner as the ink cartridge of FIG. 5, the bulged
by the application of adhesive to the shoulder 54 and/or 15
portions ‘52 or 68 being deformed by the deforming mem
the exterior of the annular projection 55, or by the appli
ber 16 in the same manner as the bulged portion 24 of the
cation of heat and pressure to seal the shoulder 54 to the
ink cartridge of FIG. 5.
lower extremity of the tubular ink holder 20’, an effec
Thus, it can be seen that in the illustrated embodiments
tive and non-leaking construction is simply and quickly
there is provided a deformable bulged portion, the bulged
attained.
20 portion being generally concavo-convex with its external
In FIGS. 9, 10 and 11 there is shown another modi?ca
diameter not exceeding the internal diameter of the tubu
tion of the ink cartridge of FIG. '8. According to this
lar ink holder.
modi?cation, a tubular ink holder 60 is provided with the
Unlike prior art writing instruments utilizing replace
upper end thereof closed by means of integrally formed
able
ink cartridge units, it is not necesary to shake the
openable or pierceable partitions 61. The bore of the ink 25
pen in order to force the ink to flow when the cartridge is
holder above the partition 61 has a reduced diameter to
initially inserted. Instead, mere insertion and assem
de?ne an annular guide 62 for the tubular extension 35.
bly produces an automatic priming action.
The lower end of the ink holder 60 is closed by means
Other means, such as are disclosed in the aforesaid co
of a closing plug 64, the latter including a rearwardly ex
pending application, may be used in the ink cartridge to
tending bulged portion 68, the rear of the bulged portion
wardly projecting annular sealing projection 55 which
30 still further facilitate the ?ow of ink from the cartridge
having a thickened portion 69 ‘for reinforcing the bulged »
by breaking any vapor barrier which may exist at the rear
portion. The forward end of the closing plug 64 is
of the extension 35, said means including a ball B.
formed with an outwardly extending circumferential ?ange
If the writing instrument should be left open, e.g. with
66 which is provided with an abutting shoulder 67, the
shoulder '67 bearing against the lower extremity of the 35 the cap removed, for a prolonged period with the instru
ment positioned so that the ink in the cartridge does not
tubular ink holder 60 when the closing plug 64 is inserted
contact the ‘feeding extension, the writing ?uid may dry
therein. The closing plug 64 also includes a forwardly
in the pen section. In accordance with the invention, the
projecting annular projection 65 which bears against the
bulged portion 24 is preferably resilient so that, upon
interior of the lower extremity of the tubular ink holder
loosening the pen section 30, the bulged portion 24 will ex
60.
pand to draw air into the cartridge through the ink feed
Preferably, the forward end 74 of the annular projec
channel 41 which is open because of the evaporation of
tion 65 tapers inwardly in order to permit the plug 64
ink.
The pen can now be placed in writing position and
to be easily inserted into the lower open end of the ink
the pen section screwed home to employ the bulged por
holder 60. The insertion of the plug may also be facili
tion 24 as a pump to prime the pen should this become
tated by providing the lower end of the ink holder 60 with
45 necessary between cartridge replacements. This pump
an enlarged radial recess 75.
ing action is facilitated by the presence of the annular
In assembling the cartridge of FIGS. 9-11, the ink 63
guide 27' in sealing engagement with the extension 35
and the ball B are inserted in the ink holder 60 and the
since this permits loosening of pen section '30 without
plug 64 is then inserted into the lower open end of the ink
danger of leakage.
holder 60. In the modi?cation shown in FIG. 8, the plug
is secured in position by an adhesive or heat-sealing. If
desired, adhesive bonding or heat-sealing may be used in
the modi?cation of FIGS. 9~l1. However, whether or
-It is apparent that the rear face 33a of the reduced por
tion 33 of the pen section 30‘ de?nes a stop; surface which
limits the telescoping or insertion of the extension 35 into
the ink cartridge. Therefore, when the pen is completely
not such sealing means are used in FIGS. 9~11, there is
assembled and the pen section is fully seated in the open
used a ferrule 70 which is provided with an inwardly
turned flange 71 at the lower end. After the plug is 55 end of the barrel, the distance between the rear face or
stop surface 33a and the forward extremity of protuber
placed into the lower end of the ink holder 60, the ferrule
ance 17 will be less than the total length of the cartridge.
70 is placed into position as shown in FIG. 11 and the
As a result of this, as the pen section 30 is being screwed
forward end of the ferrule is reduced in diameter as shown
into the barrel, the bulged portion of the cartridge will be
at 72 by crimping or in any other manner.
forced
against the protuberance which will cause the
60
Reduction of the diameter of the forward end of the
bulged portion to deform to force a small amount of writ
ferrule also pinches inwardly the abutting portion of the
ink holder as shown at 72.
This serves to secure the fer
rule and, therefore, the plug to the cartridge. The ?ange
ing ?uid out of the cartridge into the ink feed section.
Because of the axial rigidity or stiffness of the body
portion of the cartridge, only the bulged portion will
71 abuts the lower surf-ace of the circumferential ?ange
65 be deformed.
53.
In all the described embodiments of the present inven
The ferrule 70 may be made of any desirable material
but is preferably made of metal. By utilizing the ferrule,
tion, the rear end portion of the cartridge is immovably
secured to the body of the cartridge either by being made
it is not necessary to adhesively bond the plug to the ink
integral therewith or by reason of adhesive engagement
holder. When a cartridge is made in accordance with the 70 or by use of a ferrule.
structure of FIG. 8 utilizing heat-sealing, there is a tend
Attention is directed to FIG. 7 which shows the parti
ency for the adhesive seal to break during freezing weather
tion of the cartridge in the open position. The diam
because of the expansion of the ink in the cartridge. The
eter of the annular guide at the forward end of the car
utilization of the metal ferrule eliminates the possibility of
tridge and the diameter of the rear extension 3-5 of the
separation of the plug when the contents of the cartridge 75 pen unit, are both smaller than the diameter of the body
3,087,463
7
of the cartridge immediately below the openable parti
tion.
Because of this construction, when the rear exten
sion 35 is inserted into the annular guide, the partition
is forced rearwardly but remains fastened to the car~
tridge in a hinge-like manner. In other words, there is
sufficient clearance between the outer periphery of the
rear extension 35 and the inner diameter of the body
of the cartridge to permit the partition to remain secured
8
the forward end of said opening de?ning a forward annu
lar guide portion for reception of said ink feed section,
the rearwardly extending bulged portion closing the rear
end of said opening, said ink feed section extending
through said annular guide in sealing engagement there
with, the forward portion of said cartridge having an out
wardly extending circumferential ?ange, the forward ex
tremity of said barrel having a diameter at least equal
to the diameter of said ?ange, said barrel having a shoul
to the cartridge. This construction prevents the parti
tion from falling free into the ink supply and possibly 10 der of a diameter less than that of said ?ange rearward of
said ?ange.
blocking the passage of ink.
5. A writing instrument as recited in claim 1 wherein
In the constructions of both FIG. 8 and FIG. 11, the
said
bulged portion is generally ‘concavo-convex.
external diameter of projections 55 and 65 respectively
6. A writing instrument as recited in claim 5 wherein
may be slightly greater than the internal diameter of the
lower portion of the cartridge body so that when the 15 the external diameter of said bulged portion does not ex
ceed the internal diameter of said cartridge.
plug is inserted in the body, the diameter of the contiguous
7. A writing instrument comprising a tubular barrel
portions of the body ‘will be slightly increased. This
having an open forward extremity communicating with
assists in providing a ?rm liquid-tight seal. The use of
a cartridge receiving chamber within said barrel, deform
the ferrule as shown in FIG. 12 further serves to tighten
ing means immovably positioned within said barrel at the
the connection between the sealing projection and the
rear of said cartridge receiving chamber, said deforming
lower end of the body.
means having a centrally located forwardly extending
What is claimed is:
protuberance positioned thereon, a replaceable rigid car
1. A writing instrument comprising a barrel having an
tridge containing liquid writing ?uid, said cartridge being
open forward extremity, a replaceable rigid cartridge
slidably positioned within said cartridge receivng chamber
containing liquid writing ?uid, said cartridge being slid 25 with the rear end of said cartridge terminating in a rear
ably positioned within said barrel, said cartridge having
wardly extending bulged portion, said bulged portion de
a closed rear end portion constituted by a deformable
?ning a relatively small portion of the volume of said
cartridge, said deforming means engaging the rear of said
de?ning a relatively small portion of the volume of said
cartridge to limit the rearward movement of said car
30
cartridge, deforming means immovably positioned within
tridge within said barrel, a pen section threadedly secured
said barrel and limiting the rearward movement of said
to the open forward extremity of said barrel, said pen
cartridge within said barrel, a pen section secured to the
section having a rearwardly extending tubular ink feed
open forward extremity of said barrel, said pen section
section,
said ink cartridge having a forward annular guide
having a rearwardly extending ink feed section, said ink
with an openable partition positioned therebehind,
feed section extending into said cartridge, said cartridge 35 portion
said ink feed section being ?tted within said annular guide
being normally separable from said ink feed section, said
and sealingly engaging the same and extending into said
pen section engaging said cartridge and forcing the rear
cartridge, said cartridge being normally separable from
of said cartridge against said deforming means whereby
said ink feed section, said pen section engaging said car
said ‘bulged portion is deformed and forced inwardly of
tridge
and forcing said bulged portion against said pro
40
said cartridge to slightly reduce the volume of said car
tuberance
to deform said bulged portion inwardly of said
tridge and to force only a small amount of the writing
cartridge to slightly reduce the volume of said cartridge
?uid out of said cartridge into said ink feed section.
and to force only a small amount of the writing ?uid out
2. A writing instrument comprising a tubular barrel
of said cartridge into said ink feed section.
having an open forward extremity communicating with
8. An ink cartridge comprising a rigid elongated
a cartridge receiving chamber within said ‘barrel, deform
straight-walled tubular body having a longitudinal open
ing means immovably positioned within said barrel at
ing therethrough, a small rear end portion immovably
the rear of said cartridge receiving chamber, a replace
secured to and closing one end of said body, said rear
able rigid cartridge containing liquid writing ?uid, said
end
portion being constituted ‘by a deformable rearwardly
cartridge being slidably positioned within said cartridge
extending generally concavo-convex bulged portion, said
receiving chamber with the rear end of said cartridge ter 50 bulged portion de?ning a relatively small portion of the
minating in a rearwardly extending bulged portion, said
volume of said cartridge, an openable partition obstruct
bulged portion defining a relatively small portion of the
ing said longitudinal opening near the forward end of
volume of said cartridge, said deforming means engaging
said cartridge, said partition being positioned rearward
said bulged portion and limiting the rearward movement
of said cartridge within said barrel, a pen section secured 55 of the forward extremity of said opening, whereby the
forward extremity of said opening de?nes an annular
to the open forward extremity of said barrel, said pen
guide for reception of an ink feed section of a pen sec
section having a rearwardly extending ink feed section
rearwardly extending bulged portion, said bulged portion
extending into said cartridge, said cartridge being normally
tion, and liquid wiriting ?uid in said cartridge, said parti
tion preventing egress of writing ?uid from said cartridge,
separable from said ink feed section, said pen section
engaging said cartridge and forcing the rear of said car 60 said rear end portion comprising a closed plug ?tted
within the rear end of the opening in said tubular body,
tridge against said deforming means whereby said bulged
said plug having a deformable rearwardly projecting gen
portion is deformed and forced inwardly of said cartridge
erally concave-convex bulged portion, a circumferential
to slightly reduce the volume of said cartridge and to
?ange forward of said bulged portion, the diameter of said
force only a small amount of the writing fluid out of said
?ange being substantially equal to the external diameter
cartridge into said ink feed section.
65 of the rear of said body, an annular sealing projection
3. A writing instrument as recited in claim 2 in which
extending forwardly of said circumferential ?ange and
said ink car-tridge is provided with a forward annular
positioned inwardly of the outer periphery of ‘said ?ange,
guide portion with an openable partition positioned there
said projection extending within the open rearward ex
behind, said ink feed section extending through said
tremity of said body.
annular guide in sealing engagement therewith.
70
.9. An ink cartridge as recited in claim 8 wherein the
4. A writing instrument as recited in claim 2 wherein
external diameter of said bulged portion does not exceed
said ink cartridge comprises an elongated tubular body
the internal diameter of said tubular ink holder.
having a central opening therethrough, an openable parti
10. An ink cartridge as recited in claim 9 wherein the
tion intermediate the ends of said opening, said partition
forward
extremity of said ink cartridge is provided with
being positioned near the forward end of said cartridge,
3,087,463
it)
an outwardly extending circumferential ?ange immovable
relative to said body, the diameter of said ?ange being
greater than the diameter of said cartridge rearward of
said ?ange.
in secure sealing engagement with said sealing projection.
14. An ink cartridge comprising a rigid elongated
straight walled plastic tubular body formed with an in
11. An ink cartridge comprising a rigid elongated
straight-walled tubular body having a longitudinal open
ing therethrough, a small rear end portion immovably
formable rearwardly extending bulged portion and an
open forward extremity, the open forward extremity of
said tubular body being provided with an integral out
tegral closed rear end portion constituted by a thin de
secured to and closing one end of said body, said rear
wardly extending circumferential ?ange, a plastic closing
plug, said plug having a forward annular guide portion,
a centrally disposed openable partition positioned rear
wardly of said guide portion, an outwardly extending cir
end portion being constituted by a deformable rearwardly
extending generally concave-convex bulged portion, said
bulged portion de?ning a realtively small portion of the
volume of said cartridge, an openable partition obstruct
ing said longitudinal opening near the forward end of
said cartridge, said partition being positioned rearward
of the forward extremity of said opening, whereby the
forward extremity of said opening de?nes an annular
cumferential ?ange and a circumferential wall positioned
rearwardly of the ?ange of said plug, said plug being
?xedly secured to said tubular body with the said wall of
said plug ?tted within the open forward extremity of said
tubular body and with the said ?ange of said plug abutting
guide for reception of an ink feed section of a pen section,
the said ?ange of said tubular body.
and liquid ‘writing ?uid in said cartridge, said partition
15. A writing instrument as recited in claim 1 wherein
preventing egress of writing ?uid from said cartridge, the
said rear end portion comprises a closed plug ?tted within
forward extremity of said ink cartridge being provided 20 the rear end of the body of said cartridge, said plug hav
with an outwardly extending circumferential ?ange, the
ing a ‘deformable rearwardly projecting generally concavo
?ange immovable relative to said body, the diameter of
said ?ange being greater than the diameter of said car
tridge rearward of said ?ange, the rearward extremity of
said bulged portion being reinforced.
12. An ink cartridge comprising a rigid elongated
convex bulged portion.
16. An ink cartridge comprising a rigid elongated
straight-walled tubular body having a longitudinal open
25 ing therethrough, a small rear end portion immovably
secured to and closing one end of said body, said rear
straight-‘walled tubular ‘body having a longitudinal open
ing therethrough, a small rear end portion immovably
end portion being constituted by a deformable rearwardly
extending generally concavo-convex bulged portion, said
bulged portion de?ning a relatively small portion of the
portion comprising a closed plug ?tted Within the rear end 30 volume of said cartridge, an openable partition obstruct
of the opening in said tubular body, said plug having a
ing said longitudinal opening near the forward end of said
deformable rearwardly projecting generally concavo-con
cartridge, said partition being positioned rearward of the
vex bulged portion, said bulged portion de?ning a rela
forward extremity of said opening, whereby the forward
tively small portion of the volume of said cartridge, an
extremity of said opening de?nes an annular guide for
secured to and closing one end of said body, said rear end
openable partition obstructing said longitudinal opening
near the forward end of said cartridge, said partition being
positioned rearward of the forward extremity of said
35 reception of an ink feed section of a pen section, and
opening, whereby the forward extremity of said opening
de?nes an annular guide for reception of an ink feed
section of a pen section, and writing ?uid in said cartridge,
liquid wiriting ?uid in said cartridge, said partition pre
venting egress of writing ?uid from said cartridge, the
forward end of said body being closed by means of a clos
ing plug ?xedly secured thereto, said plug including said
openable partition, the forward end of said body being
said partition preventing egress of writing ?uid from said
provided with an outwardly extending circumferential
cartridge, said plug having a circumferential ?ange for
?ange, said plug having an outwardly extending circum
ferential ?ange abutting the ?ange of said body, said plug
ward of said bulged portion, the diameter of said ?ange
being secured to the body in a ?uid tight manner by a
being substantially equal to the external diameter of the
rear of said body, an annular sealing projection extending 45 metal ferrule crimped around said abutting ?anges.
forwardly of said circumferential ?ange and positioned
inwardly of the outer periphery of said ?ange, said pro
jection extending within the open rearward extremity of
said body, said plug being secured to said body by a 50
ferrule surrounding said circumferential ?ange and the
rear extremity of said body.
13. An ink cartridge as recited in claim 12 wherein the
forward end of said ferrule has a reduced diameter
whereby the abutting portion of the body is maintained
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,765,383
2,870,742
Punte _______________ __ June 24, 1930
Hackmeyer ___________ __ Jan. 27, 1959
45,768
269,681
.Germany ____________ __ June 14, 1888
Switzerland ___________ __ July 15, 1950
FOREIGN PATENTS
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