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Патент USA US2108911

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.Feb. 22, 1938.‘
f
- E. WETZEL
2,108,911
FOUNTAIN, PEN FOR CONCEN'fRATED INK
- Filed April 1:5, 1937
-
s Sheets-Sheet 1
Feb. 22, 1938.
E, wETzEL
2,108,911
‘FOUNTAIN PEN FOR CONCENTRATED INK ’
Filed Api'i1K13', 1937
as A "
s Sheets-Sheet 2
\
#13737”
Feb. 22, 1938.
E. WETZ‘EL;
2,108,91 1
.
FOUNTAIN PEN FOR CONCENTRATED INK
‘Filed April 13, 1937
I; 72.
3 "Sheets-Sheet 3
f7 .73.
1/5
5511
4,..W
Patented Feb. 22, 1938
2,108,911 V
umrso STATES PATENT OFFICE - I
2,108,911
7
.
FOUNTAIN PEN FOR CONCENTBATED INK
Eugen Wetzel, Baitingen, Bade, Germany
Application April 13, 1937, Serial No‘. 136,592
In Germany April 17', 1%{36
'
(Cl. 120—42)
The invention which will be hereinafter tie- in the container Ii and serving for the continuous
'1 Claims.
scribed relates to a fountain pen with a con
tainer for concentrated ink, coloring matter and
‘the like,,said container being movable relative
to the holding body.
The fountain pens of all systems which are
in commerce, are constructed in such a manner,
that they must be ?lled with ink from time to
time, the ink being sucked in by means‘ of pistons
10 or by vacuum.
If by accident there is no ink
at disposal, it is impossible to re-?ll the fountain
pen so that it cannot be used.
The object of the invention .is to obviate this
inconvenience.’
'
Three embodiments of the invention are illus
trated, by way of example, in the accompany
ing drawings in which
-
,
Fig. 1 shows in section a fountain pen accord
ing to the first form of construction.
emptying of .the container I for the coloring mat- .
ter or for pressing out the actually required quan
tity of coloring matter. A screwthreaded shaft I I
is rigidly connected with the piston III and carries
a set nut I2, an abutment nut I3 and a counternut I4 constructed as a cap nut.
"
'
The fountain pen according to the invention is
used as followsz-
‘
‘
The clamping or set nut I2 is screwed up to the 10
abutment nut I3 (Fig. 2) whereupon the cap nut
I4 is depressed until the containers for the color
ing matter and with the same the piston 5 are
pushed into the ink container I (Fig.. 3). The r,
air is thus pressed out of the ink container as in 1°
all known fountain pens of the piston systems.
At the same time the piston III in the container
6 for coloring matter moves inwards as can be
seen from Fig. 4 and presses a certain quantity of
Fig. 2 shows the fountain pen in elevation, the _ coloring matter determined by the abutment nut '20
sleeve being removed.
Fig. 3 shows the fountain pen in sucking posi
tion.
. I
Fig. 4 is a vertical section through Fig. 3.
Fig. 5 shows the fountain pen ready for writ
ing.
'
Fig. 6 illustrates the filling process for the con
tainer for coloring matter.
.
Fig. 7 shows an ink cartridge, particularly con
structed for ?lling the container for coloring
matter.
Fig. 8v shows partly in vertical section a foun
tain pen of the second form of construction.
Fig. 9 is a similar View as Fig. 8 showing the
' piston in another position.
Fig. 10 illustrates how‘the ?lling of the upper
container with coloring matter is effected.
Figs. 11 and 12 show the fountain pen accord
ing'to the third form of construction, in vertical
40 sections in two different positions and
Fig. 13 in elevation. I
.
The fountain pen according to the invention
consists substantially, as shown in Fig. 1, of an
ink container I and of a container 5 for the con
centratedcoloring matter and movable relative
to the’ink container.
The ink container I is
preferably made of transparent material and
closed at the front end by a pen piece 2 carrying
a pen 3 of glass, steel, gold or the like.
The rod 6 of a piston 5 serving as a sucking de
vice forms a container for the concentrate. In
this piston a discharge valve ‘I and a closing cap
8 of rubber and the like are provided‘. The clos
ing cap 8 is connected by control rod 9 or in any
m;
other suitable manner with a piston I0 mounted
I3 through thevalve 1 which is opened.
The fountain pen is then dipped into water or'
into any other material and by means of the cap
nut If they piston 511s pulled up into the extreme
position, so that the ink container I is ?lled with 25'
water which mixes with the coloring matter con
tained in the ink container I, to form writing
ink. Valve 1 has been automatically closed by
the covering-?ap 8 during the suction stroke after,
as equivalent for the discharged coloring matter, 30
the corresponding quantity of air has been sucked
into the container 6 for coloring matter, during
the stroke of the piston. It is thereby prevented
that in any position of the fountain pen more
coloring matter can be dissolved and further the 35
coloring matter dries as the container is now
air-tightly closed. For security‘sake the set nut
I2 is then screwed home as can be seen from
Fig. 1.,
A sleeve 4 (Figs. 1 to 4)
ment for the piston 5 has
tension I5 for a. capsule
screwed on as shown in Fig.
-
serving as an abut- 40
a screwthreaded ex
I6 which has to be
5, to ensure a practi-v
cal shape of the fountain pen.
-
As can be seen from the foregoing description, 45
the operation of the fountain pen according to
the invention differs from that of an ordinary
fountain pen of the piston system only by' the
unscrewing of nut I2 prior to the pressing stroke A
and by screwing home of this ‘nut after the suc- 50
tion stroke.
‘
'
‘
The control of the valve or the mixing of the
coloring matter or the‘ dosing of the same are’
automatically effected. If the concentrate can
be diluted 15 to 20 times, it is possible to employ 55
2
2,108,911
va quantity of concentrated coloring matter which
lasts for 6 to 12 months. To re-?ll the‘ container
6 of coloring matter, a container 20 as shown
in Fig. 6, is employed in that after unscrewing
the cap nut I4 (Figs. 1-4) the container 6 for
coloring matter is completely pulled out of the
ink container I and pushed with its piston 5 into
this container or cartridge 20. The nuts. I2, I3
and I4 are then unscrewed from the screwthread
10 ed shaft “and an extension piece I1 is screwed
onto this shaft in any suitable manner.
double piston is then screwed'down and the head
30 screwed on.
"
This form of construction presents in com
parison with the?rst one the advantage that it’
is without valve, nozzles and the like so that not
only the function is reliable‘ but the manufactur
ing is extraordinarily simpli?ed.
In the case I as shown in Figs. 11 and 12 a con
siderably larger chamber 33 for the concentrate
is provided. Piston chambers 34 and 34a extend 10
from the lower and upper end of the enlarged
In the position shown ‘in Fig. 6 valve 1 is opened
chamber 33., The pistons movably mounted in
and during the suction stroke the container 6 'is
the case consist each of an upper disc 36a and a
?lled with coloring matter. In order that air
can ?ow into the cartridge 20 for coloring matter
during the suction stroke the screw bolt 22 hav
ing an air channel 2I is slightly unscrewed.
After the above proceeding the extension piece
I‘! is removed, the nuts I2, I3 and I4, are screwed
20 onto the screwthreaded bolt II into the initial po
sitions andthe container for coloring matter is
pushed into the ink container I.
The cartridge of coloring matter is then air
lower'disc 35, 35a of corkand of an intermediate
15
tightly closed by the nuts 22, I8 and 23, the pack
25 ing 24 of cork or similar material preventing the
coloring matter from ?owing out.
-
The fountain pen constructed according to the
invention may be ?lled with ink also in the usual
' manner, the ?xing nut I2 being not loosened but
30 .the pen being dipped into the ink after the pres
sure stroke, so that ink is sucked in, the valve 1
remaining permanently closed. It may be ad
visable to arrange the container for coloring mat
ter in the protecting cap, so that this container
35 is under any circumstance separated from the ink
container.
The 15
disc 31, 31a of rubber or similar material.
two pistons are ?xed on a- piston'rod 26.
'
From the upper piston extends upwardly a‘
screw spindle 38 with steep pitch. Into the up
per intermediate screwthreaded end of case I the
threaded end 38 of an end piece 40 is screwed
(Figs. 11 and 12) which in the inner end carries
a packing 4I. Through this packing a nut 42
with bore and internally threaded shaft extends,
the upper end of said shaft being fixed in a knob
43 by a transverse screw 44. By turning knob 43 25
the piston is raised or lowered.
The space between the two pistons 35a and 36
is ?lled with coloring matter which moves to
gether with the pistons and is not submitted to
pressure. When the piston 35 is in the lower 30
most position, the extension piece 2 with the pen
is dipped into a solvent, for instance water and ‘
the‘ pistons are raised by corresponding turning
of the knob 43, whereby ‘the chamber 34 under
piston'35 is ?lled with water M. In the inner 35
wall of chamber 34 an annular groove 31 is ar
-
A fountain pen constructed according to the ‘ ranged which, when the piston is in the lowermost
position, is filled with coloring matter, which
principle described may be carried out in a simi
lar form as shown in Figs. 8 to 10. Two pistons when the piston is moved upwards again remains
24 and 25 are mounted on a- shaft 26, so that a
double piston is formed, This double piston is
adapted to move in a sleeve I, which has one or
several circular grooves 21. The moving down
wards or upwards of the piston is effected by a
screw-threaded rod 3I with steep pitch, which is
rigidly connected with a head 30 so that, when
this head is turned the double piston is lowered or
raised. Between head 30 and the corresponding
end of sleeve I a short screwthreaded rod 29 is
inserted adapted to be screwed into an internal
screwthread 32 and serving to connect the head
30 with the sleeve I. Fig. 8 shows the double pis
ton in the lowermost position. The concentrate
is in the chamber formed between the two pis
tons 24 and 25, so that it is air-tightly shut off.
in this annular groove and is automatically mixed - 40
with the water to form writing ink.
The fountain pen according to 'Figs. 11 to 13
possesses the special advantage, that by the rub
ber discs 31, 31a arranged between the cork discs
36a, 35a and 36, 35 respectively the enlarged
chamber 33 ?lled with concentrate K is air
tightly closed and that by the packing H a good
packing between this chamber and the turnable
knob 43 is produced.
I
claim:—
-
p
1. An improved fountain pen with a container
for concentrated ink, coloring matter or the like,
comprising in combination a tubular ink con
tainer, an extension piece screwed on the lower
end of this container, a pen in this extension
The groove 21 is above the piston 24 so that it is ‘ piece, a piston in the top of the said ink con
completely ?lled with concentrate. The fountain tainer, a discharge valve in said piston and a
pen is then dipped intovwater or into any other
similar liquid and the double piston raised by
turning head 30 so that water is sucked in (posi
tion shown in Fig. 9). The concentrate is moved
upwards between the double pistons with the ex,
ception of the quantity ?lling the circular groove
21. This quantity mixes then with the water to
form writing ink.
-
'
closing ?ap of rubber on said valve, a ring on
the upper end of said ink container, an externally
screw threaded extension at the top end of said
ring, a container for concentratedcoloring mat
ter inserted in the extension of. said ring, a piston
in the upper end of, said upper container, a rod
downwardly extending from said piston and con
nected with saidclosing ?ap, a screw threaded
rod upwardly extending from said piston in
Fig. 10 shows how the coloring matter is ?lled said upper cont'ainer,.a ?xing nut screwed on
into the fountain pen. The intermediate piece-29 this rod, a cap screwed on the top end of said
with the screwthreaded shaft is screwed out and screw bolt and an abutment nut under said cap.
the head 30 removed from sleeve I. The double
2. Fountain pen as speci?ed in claim 1, ‘com
piston is then pulled out with the aid of the steep _ prising in combination with the'ink container
pitched screw 3I until the upper piston 25 is above grooves in the inner surface of the wall of said
the top end of sleeve I. Concentrated coloring ink container designed to hold a necessary quan
matter is then ?lled into sleeve I by means of a
tity of coloring matter for produr'ng writing ink
syringe or any other suitable instrument.
when mixed with water. /
The
v
76
II
3
2,108,91 1
3. A fountain pen as speci?ed in claim 1, com
prising in combination a container comprising‘
in its lower portion an ink container and in'its
upper portion a container for coloring matter,
said ink container having a circular groove in its
inner wall and internal screw threads at the
upper end, a piston rod in said ink container, a
piston on the lower end, and a piston on the
upper end of said piston rod, the lower piston
10 being underneath said groove when said rod is
pushed down, a high pitch screw spindle in the
top end of said upper piston, a short screw
threaded rod adapted to be screwed into the
upper end of said ink container, a head on the
top_ end of. said screw threaded rod, and a nut
between said head and the upper end 01 said con
tainer.
4. A fountain pen as speci?ed in claim 1, com
prising in combination with a case subdivided
20 into a lower chamber having an annular groove
in its inner wall and an upper chamber, an inter
mediate chamber which is wider than said upper
and under chambers, so that a large quantity or
concentrated coloring matter can be stored in the
fountain pen.
'
~
5. Fountain pen as speci?ed in claim 1, com
prising in combination with the upper and lower
compartments and a larger middle compartment,
a vertical piston rod, a piston at the lower end,
30 and a piston at the upper end of said rod, said
pistons consisting each of cork discs and of a
rubber disc enclosed between said two cork discs
adapted to air-tightly close the space ?lled with
coloring matter.
‘ 6. Fountain pen as speci?ed in claim 1, com
prising in combination with the upper and lower
compartments and a larger middle compartment,
a vertical piston rod, a piston at the lower end, ‘
and a piston at the upper end of said rod, said
pistons consisting each of cork discs and of a
rubber disc enclosed between said two cork discs 10
adapted to air-tightly close the space ?lled with
coloring matter and in the upper end of said case
a head piece with internal packing of the‘upper
end of said fountain pen.
7. A tountain pen as speci?ed in claim 1, com 15
prising in combination with the case, an upper
and a lower chamber in said case, said lower
chamber having an annular groove in its inner
wall, and a‘ilarger chamber between these two
chambers ?lled with coloring matter, a vertical 20
rod shiftable in said case, a piston on the upper
end and a piston on the lower end of said rod,
said upper piston ending at the top end of said
larger middle chamber and said lower piston
engaging in the lower position in the lower cham 25
ber and in the lilted position clearing said an
nular groove ?lled with coloring matter and
remaining at a certain distance ,ifrom the lower
end of said larger chamber to further enlarge
the same.
’
EUGEN WETZEL.
30
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