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Патент USA US3039446

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June 19, 1962
H, A. A, EXNER
3,039,436
FOUNTAIN PEN WITH RETRACTABLE WRITING ELEMENT
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Filed June 19, 1957
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INVENTOR
HELLMUT'H A. A. EXNER
June 19, 1962
H. A. A. EXNER
3,039,436
FOUNTAIN PEN WITH RETRACTABLE WRITING ELEMENT
Filed June 19, 1957
11
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l3
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20
2 Sheets-Sheet 2
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3,®3§,43b
Patented June 19, 1962
2
FIGURE 2 is a lengthwise section through the same
3,039,436
FOUNTAIN PEN WITH RETRACTABLE
WRITING ELEMENT
Hellrnuth Alfred Artur Exner, Laprida 5141,
Mar del Plata, Argentina
Filed June 19, 1957, Ser. No. 666,511
Claims priority, application Brazil Sept. 19, 1956
4 Claims. (Cl. 120-4203)
pen, in closed position.
FIGURE 3 is a view on a larger scale of the pen point
with its capillary chamber, tapered pen and tapered ink~
point with counterweight.
FIGURE 4 represents section 4-4 of FIG. 2.
FIGURE 5 is a longitudinal section through a fountain
pen of FIGURE 1.
FIGURE 6 is a longitudinal section through the clip
The present invention refers to a fountain pen with a 10 portion of the fountain pen of FIGURE 1.
FIGURE 7 is a longitudinal section through the hinged
retractable writing element and has for its main purpose to
lever of the fountain pen of FIGURE 1.
improve the safety against dripping while in closed state
FIGURE 8 is an enlarged fragmentary view of a por
of such pens and to ensure the ink feed when in an opera
tion of the fountain pen of FIGURE 1. tive state.
FIGURE 9 is a sectional View taken on line 9-9 of
Retractable pens are already known in which the with—
FIGURE 7.
drawal of the pen automatically causes the closure of the
FIGURE 10 is a sectional view taken on line ltl-Itl
of FIGURE 6.
FIGURE 1.1 is a sectional view taken on line 11-11 of
have not found wide acceptance.
In the present invention the inner point of the fountain 20 FIGURE 5.
FIGURE 12 is a sectional view taken on line 12—12
pen body is provided with a preliminary ink chamber the
of FIGURE 5.
centrally-bored capillary discs of which provide a guid
writing point against loss of ink. These known construc
tions, however, due to their complexity and unreliability
In the ?rst illustrated embodiment, the pen-body 10
incorporates a slidable carrier-body 111 which, by pres
layers of perforated rubber, foam rubber or similar ap 25 sure exerted by spring 12 is held in “closed” position.
Within the central portion of carrier-body 11 ink-tube 13
propriate material, behind which the writing point may
is ?rmly inserted and is surrounded by one or more heli
withdraw into the preliminary chamber proper when in
ing channel for the writing tip. This chamber, in fact,
is provided in front with a seal consisting of one or several
inoperative position.
cal channels 14 which connects ink-container 24 and com
pensator-chamber 16 for the passage of air replacing the
The fountain pen is tubular, of a length exceeding that
required for a retractable writing instrument of modern 30 ink consumed, or for drawing up ink when ?lling the
penholder through inlet 15 and compensator chamber 16,
design. It therefore would suffer from the disadvantage
said channels 14 opening into ink-container 24, but ap
that the ink feed is unreliable and that the writing point
pearing as closed only because FIGURE 3 is shown in
lacks stability. According to the present invention, how
longitudinal section. Ink-tube 13 can be made of plastic
ever, the inner and outer diameters of the instrument
taper outwardly and uniformly from the writing tip to 35 material and ?rmly houses guide~tube 17, of a smaller di
ameter, sliclably arranged in the guide-portion of the pre
wards the ink container. At the same time, the inner
liminary ink-chamber 13 formed by a central boring
inking point with counterweight is provided with a corre
through capillary discs 19. These capillary discs, being
sponding taper, said inking point and counterweight as
seated in the lower end of body Iii, act as ink-detaining
semlbly being formed by one or several telescopically in
serted tubular pieces in which the inking point is ?rmly 40 means, forming ink-detainer chamber 18 and are so posi
tioned that there are capillary spaces therebetween there
inserted. One end of same is ?xed in the counterweight,
by producing 'the necessary capillary force for absorbing
while the other end acts as a valve stop against the point
or retaining the ink which is spurted from the needle 21
after retraction and the accompanying lowering and
taper of the guide tube obtained 'by extrusion or other
means. The inking point, in known fashion, projects from 45 proper positioning of the counterweight 22. The ink so
tube inserted in the slide-conduit of the pen or the inner
this tubular counterweight assembly, thus passing through
the pointed writing end of the fountain pen.
The ink container, formed of ?exible and transparent
material, consists of a thin-walled cylinder reinforced by
absorbed or retained thereby keeps the needle 21 wetted
with fresh ink while in retracted position, and same is
thus always ready for use. The writing tip itself is firmly
set in the point of slide-tube 17, being formed by a' small
some longitudinal ribs 52 (FIG. 5) which are ?rmly con 50 tubular piece 20 of minimum diameter. The fountain
nected at the upper end of the container with the hollow
pen assembled from tubes of sundry diameters can also
and transparent control push button 37 ‘forming a single
be made of a single tubular part, extruded, drawn or
piece, the ink-receiving space being extended to the hol
otherwise formed according to the several diameters re
quired for the flow of ink. The ink-needle structure in
low inside of the said control pushbutton 37.
In order to permit more readily a greater ink charge 55 cluding ink needle 21 is preferably formed of a tubular
member 25 ?rmly positioned at one end thereof in coun
in the ink container, Without increasing the size of the
terweight 22, the other end thereof forming the valve
fountain pen, said ink container can be formed as a cylin
stop 27 against the point tube 29, the ink needle 21 being
der equipped with ‘a pump plunger, the invention provid
?rmly inserted at one end in tubular member 25 and at
ing that the pump cylinder is arranged in the extended
the other end being loosely inserted in pointed tube 2%
control pushbutton of the writing mechanism, ?xably or
thereby forming a capillary space between ink needle 21
connected therewith into a single piece, within the cylin
and the inner surface of said point tube 20. In writing,
drical interior of the ink container. As abutment for
the pressure on the point of ink needle 21 together with
the retractable grip a metal ring is inserted over the con
trol pushbutton.
In order that the present invention may be more clear
ly understood and readily put into practice, same will now
be described with particular reference to the attached
drawings illustrating a preferred embodiment.
In the drawings:
FIGURE 1 is a lengthwise section through a retract
able fountain pen in its open, i.e., writing position.
the counterpressure of counterweight 22 causes ink needle
65 21 and its associated ‘tubular member 25 and its associated
counterweight 22 to move up ‘and down, the upward
movement being stopped by the head of the counterweight
22 against cylinder 23 and the downward movement of
the valve-stop 27. This up and down movement together
with the capillary force causes the required ink to be
drawn from ink container 24. The required ink is drawn
3,039,436
4
from ink container 24, around counterweight Z2 and into
and through capillary chamber 255, between tubular mem
ber 25 and inside the guide-tube 17, and between valve
27 to the capillary space between ink needle 21 and the
inner surface of point tube 26. Thus, the ink ?ow
ring 47 as the latter passes by, the fountain pen is in its
“Open” position. Writing point tube 21-9, permanently
surrounded by fresh ink provided by capillary discs 19 of
inkchamber 18, is then immediately ready for writing and
through capillary chamber 28, between ‘the valve-stop 2'7
and the counterweight 22, is independent from the air
is thereafter fed by ink supplied to replace the ink con
sumed and ?owing consequent upon the inlet of air
through opening 15 of compensating chamber 16 and
bubble enclosed in the ink container 24-.
suction channel or channels 14.
The ink re
moved from container 24 is replaced by the air entering
same from compensator chamber 16 through channels 14.
Positioned about and contacting tubular member 25 is
tubular member 25, and said members 25 and 2.6 and ink
needle
are ?xedly secured in said counterweight 22,
as clearly shown in the appended drawings. Carrier-tube
13 lodges capillary chamber 23, formed by capillary discs
29 and anchored by closure 3%). Ink-needle 21, thus
?rmly inserted in its tubular member of shaft 25, is slid
ably guided within the central perforation of said discs
29. The front portion of preliminary ink ch,- nber 18 is
provided with a seal 31, formed by one or several weak
discs of soft rubber or foam-rubber or similar appropri
ate material, provided with a central perforation 32
through which the writing point is withdrawn when clos
ing the penholder, said point thus retreating into prelimi
By means of valve 27,
formed by lower end of tube ‘25 and upper end or" point
tube 2%)‘, the column of ink projected by sudden retraction
of the writing tip, is reduced to the short small-diameter
section with the greater capillarity, alongside point tube
24) beneath valve 27. The reduced cross-section of tubu
lar piece 25 above valve 27 provides suf?cient room for
compensating chamber 16 and capillary chamber 28, the
capillary spaces between capillary discs 29 of which en
sure uniform supply of ink. The eifect of this assembly
is to oppose the ejection of ink from the pen on sudden
retraction of the instrument to its “Closed” position, and
likewise to prevent the escape of ink caused by atmos
pheric changes or changes in temperature, such changes
in pressure being shunted off to the compensating cham
ber 16.
For ink re?lling purposes the lower pen body it} is
nary ink chamber 18. The opposite end of carrier-body 25 unscrewed from headpiece $9. The writing mechanism,
consisting of ink-container 24, guide-tube 17' and control
11 is provided with cylinder 23 of ink-container 24, the
pushbutton 6'7 with its accessory parts, can then be re
pump-plunger 33 of which is actuated by a long, fast
moved. By turning control pushbutton 37 and conse
action screw 3%, ?xed in said plunger. The threaded
quently threaded bushing 35' in the direction marked “To
bushing 35 provided for said screw in the terminal piece
Empty” on pushbutton 37, fast~action screw 34 is sepa
of cylinder 23 is there rotatable and held against axial
rated from clamping cone 38 of cylinder 23 and pump
movement by means of stop ring 36, which is ?rmly seated
plunger 36, prevented from turning by guiding groove 41,
in cylinder 23. Said threaded bushing 135 together with
is advanced longitudinally through cylinder 23 until stop
the hollow pushbutton 37, comprises a united and ?rmly
51 abuts against the threaded pontion of bushing 35, under
inserted piece. Cylinder 23 of ink container 24 is pro
vided, at its upper end portion, with a comically shaped 35 which circumstances the air and ink contained in the
cylinder are expelled through channel or channels 14 and
opening to receive the cone 38 of last-action screw 34
compensating chamber 16, By introducing the writing
thereby preventing the loosening of said screw 34 in the
nib up to inlet 15 into fresh ink and returning control
threaded bushing 35 while the writing element is being
pushbut-ton to its original position, pumping plunger 33
pushed into or retracted from writing position. For the
draws the ink towards ink-container 24 until clamping
same purpose, namely, to prevent rotation of control
cone 38 seats against cylinder 23. The writing mecha
pushbutton 37 in headpiece 39 of the penholder, the
nism can then be returned to headpiece 39 of the pen
latter and said button 37 are furnished with guiding chan
holder and rethreaded into body 110. Referring to FIG
nels 40. In order to identify direction of turning for
URE 5, therein is shown a longitudinal section through
emptying or filling ‘the ink-container 24, said control
the fountain pen of FIGURE 1 provided with ?exible,
pushbutton 37 is provided with arrows and the indications
transparent ink container 24 including its thin walled cyl~
“To Empty,” “To Fill.” In order to prevent turning
inder 23 reinforced by longitudinal ribs 52 ‘connected to
pump plunger 33 within cylinder 23, the pump plunger
the other end of container 24 with the hollow and trans
33 is furnished with a guide channel and the cylinder 23
parent pushbutton 37. Because of the reinforcement of
with guide 41 ?tting into said channel.
said ink container cylinder 23 by said ribs 52, the con
The operating lever for the retracting mechanism or"
tainer 24- is enabled to resist the force of spring 12 when
the fountain pen, consists of a hinged lever 42 fulcrurned
the writing element is pushed into writing position. How
at 43 in clip 44-. Fingerpiece 45 of same is pressed by
ever, in order to ?ll the container 24, the headpiece 39
compression spring 4t? against check-ring 47 inserted over
is removed and the cylinder 23 of container 2:; is simply
pushbutton 37 (FIGURE 2). Said ?ngerpiece snaps in
and easily squeezed together as are the well known rubber
behind said ring and secures the writing mechanism
ink sacs of the well known and ordinary fountain pens,
against pressure exerted by spring 12, as soon as the in~
thereby forcing the air in the ink container out into chan
strument, by operation of pushbutton 37, has reached
nels 14 and then drawing fresh ink into the ink container
the ‘Open” position (FIG. 1). Clip 44 is ?rmly inserted
in head piece ‘3% and is held in position by bending the 60 24 upon withdrawal of the squeezing pressure therefrom.
I claim:
points 43 of clip 4-42» into hook portions to be received
1. A reservoir fountain pen comprising, in combination,
into the recesses of headpiece 39, as clearly shown in
a barrel, a retract-able elongated writing ink needle posi
FIGURES 5 and 9.
tioned in one end of said barrel and extending through
Operation of the retractable fountain pen is as follows:
On exerting pressure against pushbutton 37 to oppose
said barrel for a portion of its length, ‘a ?rst tubular mem
spring 12 and reach the “Open” position illustrated in
ber positioned about and spaced from said writing ink
FIG. 1, the entire writing mechanism, formed into one
needle and extending for a portion of the length of said
piece and consisting of ink-tube 13, guide-tube 15, point
needle into the barrel, said ?rst tubular member being
tube 2t}, ink-container 24 and control pushbutton 37 with
open at the end thereof within the barrel, a second tubular
its corresponding accessory parts, slides within bodies 39 70 member positioned about said first tubular member and
and it} towards the tip of the penholder, under which cir
extending for a distance beyond the open end of sad
cumstances the tubular piece Ztl in preliminary inkcham
?rst tubular member, a hollow carrier member positioned
ber 18 penetrates and passes through perforation or open
in said barrel, ‘an ink tube positioned in said carrier mem
ing d2 of seal 31. As soon as grip 45, by pressure ex
ber, said second tubular member being ?xedly positioned
erted by spring 46 snaps into position behind abutment 75 in said ink tube at the end thereof and opening into said
3,039,436
5
6
positioned about and in contact with said needle, the
outer diameter of said third tubular member being smaller
than the inner diameter of said second tubular member,
said third tubular member having its point of beginning
within said second tubular member and spaced from said
ink tube, the inner diameter of said second tubular mem
ber being greater than the outer diameter of said ?rst
tubular member, a seal member ?xedly positioned at the
lower end of said barrel adjacent the opening thereof, said
?rst and second tubular members and said writing ink
open end of said ?rst tubular member.
needle extending through said seal member opening, said
second tubular member being in contact with said seal
member at the opening thereof, a plurality of spaced
capillary discs positioned within said barrel at the portion
3. The fountain pen of claim 1 including means for
urging said writing ink needle into writing position, said
plurality of spaced capillary discs positioned within said
being tapered upwardly in steps, a plurality of spaced
means being operatively associated with said means for
adjacent to said seal member ‘and extending for a length 10 introducing ink into said fountain pen, and means for
retracting said needle ‘from writing position and into said
of said barrel smaller than the length of said ?rst tubular
barrel,
said latter means being operatively associated with
member, each of said disc members having a central open
said means for urging said needle into Writing position.
ing, each of said central openings being axially aligned
4. A reservoir fountain pen comprising, in combina
with each other, said ?rst and second tubular members
extending through said openings, the second tubular mem 15 tion, a barrel, a retractable elongated writing ink needle
positioned in one end of said barrel and extending through
ber having an outer diameter less than the diameter of
said barrel for a portion of its length, a seal member
each of said openings, thereby forming axially‘ aligned
?xedly positioned at the lower end of said barrel adjacent
capillary spaces, a third tubular member positioned about
the opening thereof, said seal member having a substan
said writing ink needle, said third tubular member ex
tially centrally positioned opening therethrough, a tubular
tending from a position on said ink needle spaced from
structure positioned about said ink needle and extending
the open end of said ?rst tubular member and extending
through said seal member opening, said tubular structure
for the remainder of the length of said needle, a second
capillary discs positioned within said barrel at the por
ber, each of said disc members having a central opening, 25 tion adjacent to said seal member and extending for a
length of said barrel smaller than the length of a portion
each of said central openings being axially aligned with
of said tubular structure, each of said disc members hav
each other, said third tubular member extending through
ing a central opening, each of said central openings being
said openings, said third tubular member having an outer
axially aligned with each other, a hollow carrier mem
diameter smaller than the diameter of each of said open
ings and than the inner diameter of said second tubular 30 ber positioned in said barrel, an ink tube positioned in
said carrier, the top portions of said tubular structure,
member, a closure member for said ink tube adjacent to
upwardly
tapered in steps, being ?xedly positioned in the
the topmost disc of said second plurality of discs, said
bottom portion of said ink tube, a tubular member posi
closure having a central opening axially aligned with
tioned about said ink needle and extending into said tubu
said disc openings and having substantially the same di
ink tube away from the end of said third tubular mem
ameter as that of each opening, said third tubular mem
35
ber and said needle extending through said opening, a
fourth tubular member positioned around and cont-acting
said third tubular member and extending for the remain
ing length of said third tubular member, a counterweight
positioned in said carrier having its bottom end spaced 40
from said closure, said ‘fourth and third tubular mem
bers and said needle extending into and being ?xedly
lar structure, upwardly tapered in steps, and being spaced
from a portion of said tubular structure, upwardly tapered
injsteps, about said ink needle, thereby forming a valve
stop, and a second plurality of spaced capillary discs posi
tioned Within said ink tube about said tubular member, a
counterweight positioned in said carrier, said tubular
member and said ink needle extending thereinto and being
?xedly secured thereto at the end opposite to its writing
point.
secured to said counterweight, a hollow cylinder attached
to said carrier member at its end portion adjacent said
References Cited in the tile of this patent
counterweight, an ink container positioned within said 45
UNITED STATES PATENTS
hollow cylinder, and means for introducing ink into said
ink container, said means being attached to said ink con
452,535
Winkler _____________ __ May 19,
tainer.
769,427
Beaumel _____________ __ Sept. 6,
2. A reservoir fountain pen comprising a retractable
2,614,885
Roell _______________ __ Oct. 21,
50
writing element including a barrel, a writing ink needle,
2,627,844
Johnson _____________ __ Feb. 10,
a ?rst tubular member positioned about said ink needle
2,800,881
Munson _____________ __ July 30,
and spaced ‘from said ink needle and extending for a por
2,800,883
Sams ________________ __ July 30,
tion of the length of said needle into the barrel, said tubu
2,805,645
Buschle _____________ ___ Sept. 10,
lar member being open at the end thereof within the
55
FOREIGN PATENTS
barrel, a second tubular member positioned about and in
11,310
Great Britain ________ __ June 22,
contact with said ?rst tubular member and extending be
yond said open end thereof, and a third tubular member
1891
1904
1952
1953
1957
1957
1957
1900
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