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Патент USA US2062162

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Ndv. 24,1936.
Filed July 20, 1955
. . . ,.
Patented Nov. 24, 1936
Louis Chayka, Detroit, Mich.
Application July 20, 1935, Serial No. 32,463
6 Claims. (Cl. 120—46)
My invention pertains to improvements in foun
tain pens and particularly in ?lling means for
fountain pens using transparent barrels. There
isv already a number of such pens on the market
5- but'the majority of them have certain disad
vantages and faults. Some of them are too com
plicated and di?icult to manufacture, some are
likely'to develop leaks, and others can be ?lled
with ink only gradually by repeated operations.
10 It‘ is» agreed that the best pen at present is the
common variety using a rubber sack, except for
the fact that‘ the pen does not show the quantity
of. ink therein. The purpose of my invention,
therefore, is to combine the best qualities of the
15 ordinary sack pen with the advantages of the pen
employing a transparent barrel showing the level
of ink‘v therein. More speci?cally, my object is to
1st‘; A pen that has a transparent barrelv and
20 uses an‘ improved ?lling device.
2nd. A ?lling device that is simple in con
struction and operation.
3rd. A?lling'device that may be removed from
the barrel as a unit.
4th. A ?lling device that‘ will ?ll the pen with
one stroke of a pushbutton or one turn of a knob.
5th. A. ?lling device that will not be likely to get
out of order.
6th. A ?lling device that will draw into the bar
rel a large quantity of. ink.
7th; A ?lling device that may be wedged into
the? barrel. without the. need of any cement.
8th. A ?lling device that will be durable,
economical, easily manufactured and easily as
~35_ sembled;
I. accomplished all these purposes by novel
means, namely, by using in the barrel of the pen
drawing in ink contained in the barrel outside
of the sack as set above. Once this principle has
been disclosed, it will be quite possible to devise
a number of different structures to carry out the
the idea without materially departing from my '5
original conception as disclosed;
Selecting a fountain pen incorporating the
preferred construction of my ?lling device, I will
explain it by reference to the accompanying
drawing, in which
Fig. 1 presents a longitudinal section of the
Fig. 2 presents a. section across the barrel on
line 2-2.
Fig. 3 presents a longitudinal section of a-dif- l5
ferent species of a pen employing a pushbutton.
Fig. 4 presents a section across the barrel of the
pen on line 4-—4.
Fig. 5 presents a magni?ed illustration of a de
tail of the pen shown in Fig. 3.
' ‘
l5 drilled centrally, said plug being of a slightly
smaller diameter in its lower half to accommodate
the upper end of the rubber sack l6, which is 30
tightly wedged between the plug and the inside
wall of the barrel Ill. The sack is wedged in such
a mannerv that neither air‘nor liquid may pass
from or into the barrel at any point around the
plug. Quite obviously, the upper end of the sack 35
may be cemented to the lower end of the plug
without being wedged as above stated or it may be
otherwise secured to the plug and the plug
40 the ink‘carrying capacity of the barrel. Ink in my
pen. is'not in the sack but outside the sack or tube,
thatis, it iscontained between the outer wall of the
sack and the inner wall of the barrel. The only
outlet from the barrel is through the ink feeding
45 groove on the feeding bar supplying ink to the pen
point,- so, when I expand the sack, I expel the
ink from the barrel. When the sack is collapsed,
The rubber sack l6, extending substantially
the full length of the barrel, is closed at its lower
end. It is of a diameter large enough to occupy
practically the whole space of the barrel when
fully expanded. Normally, however, the sack is
My invention exists, not only in the construc
tion, arrangement and combination of the various
parts, whereby the objects contemplated are ob
tained by them, but especially in the broader
idea of expanding or collapsing the rubber sack
55 mechanically for the purpose of expelling or
The pen, as shown in Fig. 1, comprises a barrel
Ill, into the lower end of which is secured the usual
section I I with a feed bar I2, groove l3 and a pen
point l4, arranged in‘the customary manner, ex
cept that the feed bar may project somewhat into 25
the barrel as shown.
The upper end of the barrel is closed with a plug
a rubber sack or‘ a rubber tube closed at one end,
not as an ink reservoir but as a means of varying
the. resulting vacuum in the barrel draws in ink
cemented or threaded into the end of the barrel.
collapsed, as shown in Fig. 2, occupying in its
collapsed state but a small space of the inside of
the barrel. Firmly, attached to one side of the
plug I5, is a thin rigid shell I'!, arcuate in shape,
parallel to the inside surface of the wall of the 50
barrel and extending in a close proximity of
said wall straight down within a short distance
of the feeding bar I2. At this point, it narrows
and turns at the right angle towards the center
of the barrel, in the form of a straight arm [8, 55
above said feeding bar. At its end above the said
already mentioned might be introduced if found
feeding bar, the arm I8 is provided with a socket . desirable.
Rotatably journalled in the center of the plug
I5 is a short shaft 20. Its upper end, outside of
the barrel, ends with a knob 2|. Its lower end
is within the barrel and is joined to a short arm
22, disposed at the right angle to the shaft and
extending into another arcuate shell 23, running
10 at right angle to the arm 22 and in a direction
parallel to the short shaft 20. At its lower end,
the shell turns again at right angle, to the center
of the barrel, and terminates in a transverse lug’
24 rotatably supported in socket I9.
Normally, the movable shell 23 nestles 'inthe
concave recess formed by the curved surface of
the stationary shell |'|. When the shells are in
this position, they occupy as ‘little space as possi
ble. When rotated by means of the knob 2|, in
Normally, the rubber sack being collapsed and
under the pressure from the said normally col
lapsed rubber sack, the leaves, both the upper
ones and the lower ones, are folded together as
shown in dotted outline 21” and 28", also 3|"
and 32". The strips, also brought together by
the position of the leaves and the pressure of
the sack, occupy positions 29" and 30".
The rubber sack, secured in an air and water
tight manner at the top of the barrel between
(‘the plug I5 and the inner surface of the barrel,
envelopes all said leaves and side strips and, as
' before stated, is in a collapsed position l6".
Fig. 4 shows a section of the pen across the
barrel on line 4—-4, l0 being the wall of the
barrel, Hi the sack, 29 and 30 the side strips when
20 either direction, the movable shell is capable of ‘ brought together as stated above.
Fig. 5 shows the detailed construction of the 20
describing a complete circle. Both shells are en
upper leaves 21 and 28 with the pushrod ZU-at
closed by the aforementioned rubber sack I6 .tached to the hinge supporting the leaves. Strips
and rest upon the upper end of the feeding bar 29 and 30 are presented fractionally.
|2 to add stability to the shells. 25 is a cap pro
The following is the manner in which the pen
25 vided with a thread on'the inside lower surface shown in Fig. 1 may be ?lled with ink: The barrel 2.5
and ?ts over the correspondingly threaded up
being empty and the rubber sack I6 being in
per part of the plug l5.
' .
its normal collapsed state, I turn the knob {20
Referring to Fig. 2, numeral l0 shows the wall completely around. In doing so, I ?rst bring the
of the barrel; the rubber sack. I6 is collapsed, arcuate movable shell 23 diametrically iniopp'o
with the two shells, the stationary I‘! and mov
sition to the stationary arcuate shell l1 asrshown
able 23, in a normal, before-operative position. in Fig. 2, where it is presented to occupy position
The dotted outline l6” shows the position of 23". As a result the rubber sack I6 is expanded
the sack when it is expanded, while the dotted fully and most of the air contained in the barrel
outline 23" shows the position of the movable is expelled. When, however, the rotation of the
35 shell 23 when the same has been turned I80 de
movable shell 23 continues, and the shell on com 35
grees from its normal position in‘ order to ex
pletion of the full 360 degrees turn, assumes the
pand the rubber sack I6. 34 and34" are heads original position within the stationaryshell. II,
at the edges of the shells to prevent them from the rubber sack collapses again to its foriginal
shape and the partial vacuum resulting there
40 In Fig. 3, I have illustrated a di?erentcon
from in the barrel causes ink to be drawn into :40
struction of my pen, in which I am using a vpush
the barrel.
" _
button at the top of the pen to cause the ex
To expel ink from the barrel all that is neces
pansion of the rubber sack or tube.
sary is to again turn the knob around ‘its axis,
In this ?gure, I0 is the wall of the barrel; parts which
as stated above, will through the instru
4.5 ||,' |2, |3, |4, l5 and I6 are the same as-in mentality
of the arcuate shells, expand the sack .545
Fig. 1. Sack I6 is of a diameter large enough to
and cause the ink to ?ow out from the barrel. occupy practically the whole interior space when
The barrel of the pen shown in Fig.‘ 3 is‘filled
fully expanded.
by depressing down the push button 20.
Normally, however, it is collapsed into a flat
When the rod is depressed it causes'the semi
50 tened shape, as shown in Fig. 4, and occupies the
central section of the ‘barrel, as shown in said
Slidably in the center of the plugv I5 is lo
cated a short rod 20, the upper end .of which
outside the barrel, ends in a push-button 26.
The lower end of the said rod is within the barrel
and within the sack I6. Hinged to the lowerend
of the rod are two semi-circular leaves 21 and.
28, so disposed with relation to each other that
when spread, they present the appearance of a
disk. The semi-circular leaves are free to swing
up and down from the hinge. This is shown in
Fig. 5. Hinged to the lower ends of the semi
circular leaves 2‘! and 28, are stiff strips 29 and
30, preferably made of metal and extending down
within a small distance from the bottom of the
barrel where the strips are joined to a similar
pair of semi-circular leaves 3| and 32, except
from their hinge
,70 at 33.the leaves point upward
The purpose of these semi-circular leaves is
to expand the sack into a round tube that it may
occupy as much space as possible. To that end
.75 v‘additional pairs of leaves between the two pairs
circular leaves and strips hinged thereto tospread
apart and to expand the sack.|6. The expansion
of the sack expels most of the air from‘the bar
rel. When the‘ pressure from the pushrod is re
moved, the leaves and the strips come together
under the pressure of the enveloping rubber sack ..55.
IS, the sack assumes its original collapsed posi
tion as shown in Fig. '4, and the difference be;
tween the capacity of the expanded sack and that
of the collapsed sack, results in a. partial vacuum
in the barrel, which vacuum causes ink to be ,60
drawn into the barrel. To‘expel ink, all that is
necessary is to press again the button 26 on‘ the
top of the pushrod 2|I._
There is a number of other constructions that
suggest themselves for the same purpose of me 65
chanically expanding the sack‘ and they can be
easily designed by anyone endowed with, ordi
nary mechanical skill. The above described con
structions are only samplesof what can be‘ done
and it is plain that other designs of the same 70
nature are possible and may be made withoutde
parting from the principle ofrmy disclosures. . I,
therefore, wish my invention to embraceall such
changes, variations, and modi?cations as will nat 76
urally suggest themselves to persons skilled in
gated member placed within the sack close to its
the fountain pen art.
What I claim is:
1. A fountain pen comprising an ink carrying
barrel a grooved feeding bar and a penpoint set
at one end thereof, a normally collapsed expan
sible sack open at one end, set at the other end
of the barrel and extending substantially the
set at one end of the barrel and means to expand
whole length of the barrel, tangible mechanical
10 means within said sack, operable from without
to cause the sack to expand to occupy substan
tially the whole space of the barrel and in turn
to cause the said sack to collapse to its original
2. In a fountain pen of the kind described, ?ll
ing means comprising an expansible, normally
collapsed sack, set at one end of the barrel and
wall and a similar movable member also within
the sack to bear against the opposite wall of same
when manually actuated by means outside the
4. In a fountain pen of the kind described,
?lling means consisting of an expansible sack
said sack comprising a pushrod, placed slidably
in the plug closing the mouth of the sack, a 10
pair of spreadable semi-circular leaves placed
within the sack and directly beneath the pushrod,
and at least another pair of similar leaves at the
lower end of the sack, a pair of strips hingedly
connecting the said pairs of leaves, said leaves 15
being normally in a collapsed folded position, but
being capable of being spread under the action of
extending substantially the whole length thereof,
the said pushrod.
the said sack being closed at the lower end and
open at its upper end, two elongated arcuate
feeding bar and a penpoint set at one end there 20
of, a normally collapsed expansible sack open at
one end, set at the other end of the barrel and
extending the whole length of same, a plurality
shells, pivotally joined at both ends, placed with
in the said sack and one of said shells being
capable of being moved with relation to the other
so as to be placed diametrically in opposition to
the other or closely within the other and means
to operate said movable shell.
3. In a fountain pen of the kind described, an
expansible sack normally collapsed, placed within
the barrel of the pen and extending substantially
30 the whole length of the barrel, and means to ex
pand said sack consisting of a stationary elon
5. In a fountain pen comprising a barrel, a
of elongated members placed within the sack and
means to spread apart said members to bear 25
against and to expand the walls of the said sack.
6. In a fountain pen a barrel, a normally col
lapsed sack therein and means within the sack
bearing against the walls thereof, operable from
without, to expand same.
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