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Патент USA US2091038

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Patented Aug. 24, 1937
2,091,013@
UNITED STATES
ATENT ÜFFïltÍÍE
2,091,038
DUPLICATING MACHINE
Alfred E. Goodwill, Ottumwa, Iowa
Application June 15, 1936, Serial N0. 85,243
6 Claims. (Cl. 101-116)
The object of my invention is to provide a
of these arms i8 is controlled by a screw 2i en-duplicating machine of simple, durable and in
gaging a lug 22 on the frame.
expensive construction. More specifically, it is
For moving the roller platen downwardly to an
my object to provide a machine of this class in inoperative
position I have provided a shaft 23
5 which the sheets of paper will be fed rapidly and
mounted
to
the
frame and having a handle 2d at 5
accurately to the stencil and platen.
A further object is to provide an improved
stop and guide device for the sheets of paper, to
aid the operator in quickly and accurately feed~
10 ing sheets of paper to the machine. .
A further object is to provid-e improved and
simplified means for detachably connecting the
stencil holder with the rotatable shaft and for
quickly and accurately aligning the stencil
15 holder relative to the shaft.
In the accompanying drawing Figure l shows
a top or plan View of my improved duplicating
machine.
Figure 2 shows a vertical longitudinal sectional
20 View of same.
Figure 3 shows a vertical transverse sectional
View through the paper holding platform and il~
lustrating the paper stop and guide device.
Figure 4 shows a perspective view of the
stencil holder detached.
Figure 5 shows a detail sectional View illustrat
ing the means for detachably centering the sten
cil holder relative to the end plates; and
Figure 6 shows an end elevation of the side
30 paper platform.
Referring to the accompanying drawing I have
used the reference numeral lâ to indicate gen
erally the frame of the machine. This frame has
at one end two upwardly extended arms i i, their
35 upper ends being extended over the body portion
of the frame, as shown by dotted lines in Figure
2, thereby forming a paper passageway from the
side of the machine to the side; of the frame under
the arms ll. On the end of the frame opposite
40 the arms l l there is fixed a paper platform i 2 ex"
tending the full width of the frame and to a point
near the ends of the arms l l.
An auxiliary paper platform is provided and
45
comprises a platform I3, made of sheet metal
and having at its ends downwardly extended
flanges ifi to engage the side of the paper plat»
form I2. At the outer end there is an upwardly
extended flange l5, and a rod lil is hooked to this
flange and pivotally mounted in the adjacent arm
5O
il so that this auxiliary paper platform may be
readily and easily detached. The two platforms
l2 and i3 constitute a paper platform.
Theroller platen I 'l is mounted in the ordinary
manner on two arms i8 pivotally connected at
it and extended upwardly, and each having its
upper end connected to a spring 20 fixed to the
frame for yieldingly holding the arms at their
upper limit and holding the roller platen at its
60 upper limit. The upward limit of the movement
one end and an varm 25 to engage the upper edge
of the arm i8. By moving the handle
up~
wardly from the position shown in Figure 2 the
arm 25 is moved downwardly to lower the roller
platen, and when the handle ’2d is in the position
shown in Figure 2 the spring 2t holds the roller
platen yieldably at its upper limit.
Mounted in the arms li is a shaft 25 having a
crank 2'! at one end. Fixed to'this shaft are two
end plates 28, and these end plates 'are formed
with tapered openings 2li, as shown in Figure 5.
The ink pad and stencil holder shown in Figure
Il comp-rises two end members til and a cylindrical
perforated body portion 3l, and an ink pad and
stencil 32 which is mounted upon the outer nur» 20
face of the body portion 3l and yieldingly held in
position thereon by a spring 33.
Seated in each of the endy plates ¿it is a screw
34 having a tapered body portion Sli, the taper
corresponding to the taper of the openings 39. 25
’I'hese end plates 36 are formed with slots 35
designed to receive the shaft
The entire ink pad and stencil holder is of
cylindrical shape, but one side is cut olf so that
when in the position shown in Figure 2 the inl:
pad and stencil holder is widely spaced apart
from the paper platform l2.
For the purpose of stopping and accurately
guiding the sheets of paper I have provided a
stop and guide plate 3l having at one edge an
upward-ly extended flange it@ and at another edge
an upwardly extended flange 38, . This stop and
guide plate is provided with a slot extended
transversely through it, as shown in Figure 2,
and through this slot there is extended a hat rod
downwardly
40 of resilient
inclined
material.
end all ~nis
to engage
rod ¿iiithe side
of the paper platform i2, and at its other end
there is a downwardly extending portion ¿l2 ad
jacent the opposite side of the paper platform. 45
Mounted on this downwardly inclined end ¿52 is a
screw t3, and mounted upon the rod fill is a flexi
ble pad ¿ill made of leather or the like. In opera
tion, when this screw ¿3 is moved outwardly the
rod «lil becomes substantially straight and the
stop and guide plate may also be. freely moved
longitudinally of the paper platform. When,
however, the screw ¿it is moved inwardly, 'the
outer end of the rod ¿l0 is inclined upwardly, as
shown in Figure 3, which forces the central por- 55
tion of the’ rod ‘lli downwardly, bringing the plate
31 into frictional binding engagement with the
paper platform above.`
In practice I have found with my improved
duplicating machine that I can attain greater» 60
2,091,038
2
speed and do more accurate work than with
the duplicators now in common use.
In prac
tice I place the blank sheets of paper upon the
paper platform I3, and then I adjust the stop
and guide device to the proper position for the
sheets selected and for the character of the
stencil used. Then I may, with the left hand,
grasp the sheets of paper and move them later
ally and forwardly across the paper platform I2
along the dotted lines 45, as shown in Figure l.
’I‘his is possible because of the paper passage
way formed in the adjacent side of the frame
and because the stencil holder is in position
widely spaced apart from the roller platen, and
when in this position the paper projects over
the roller platen so that when the handle crank
21 is turned, the stencil will engage the paper
and grip it against the roller platen and thereby
complete the printing upon the paper in the
ordinary manner. However, by this arrange
ment only one movement in a substantially
straight line of the paper is required to be done
by the operator’s left hand. I-Ieretofore it has
been necessary to feed the sheets of paper first
forwardly into the machine and then back
wardly against the paper guide, and again for
wardly into position over the platen, and this
requires additional time. With my machine a
single movement of the paper in a straight line
is all that is required, and when that is done,
the paper is accurately guided and held in posi
tion relative to the platen.
,
With my improved paper stop and guide de
vice I have demonstrated in use that when the
C) Li- screw 43 is loosened, the plate 3'! can be readily
and easily moved both laterally and longitudi
nally to the desired position, and then when the
screw 43 is tightened it is firmly clamped in that
position.
I have further demonstrated in practice that
with my improved machine I can rapidly and
accurately reproduce printing in several colors,
and I do this as follows: I provide several of
the ink pads and stencil holders, place one color
of ink and the stencil in one holder and the
remainder of the stenciled design on another
ink pad and stencil holder to which another
color of ink is applied. I then proceed in the
ordinary manner of duplicating machines, to
50 print on the sheets of paper from the first
stencil, and then remove the first stencil and sub
stitute the second stencil with a different colored
ink, and run the paper through the machine the
second time. This obviates the necessity of re
moving one ink pad and stencil holder and
cleaning the stencil holder before applying the
second stencil and ink pad with the different
color, as is now the general practice.
I claim as my invention:
l. A duplicating machine, comprising a frame,
60
a rotary ink pad and stencil carrier mounted in
the frame, a roller platen mounted in the frame
in position to hold paper against the stencil, a
paper platform carried by the frame and extend
ing from the position where it will support sheets
of paper on one side of the frame and during
their movement from said position to feeding
position, the frame being so shaped as to permit
said movement of sheets of paper in a straight
line, and said ink pad and stencil holder being
so shaped that in one position of its rotary move
ment it will be widely spaced above the roller to
permit said movement of the sheets of paper.
2. A duplicating machine, comprising a frame,
a roller platen carried by the frame, the side of
the frame directly above the platen being formed
with a passageway for sheets of paper, a rotary
ink pad and stencil carrier mounted in the frame
above the platen and being of segmental form
whereby when in one position of its movement
it will be widely spaced above the platen, and
a platform for paper sheets extending from the
position for supporting sheets of paper at the 10
side of the frame adjacent said paper passage
way to paper feeding position at the front of the
machine.
3. A duplicating machine, comprising a frame,
a roller platen carried by the frame, the side of
the frame directly above the platen being formed
with a passageway for sheets of paper, a rotary
ink pad and stencil carrier mounted in the frame
above the platen and being of segmental form
whereby when in one position of its movement
it will be widely spaced above the platen, and a
platform for paper sheets extending from the
position for supporting sheets of paper at the
side of the frame adjacent said paper passage
way to paper _feeding position at the front of the
machine, the portion of the paper platform at
the side of the frame having its inner end rest
ing upon the frame and a rod for supporting the
outer end of said platform to the frame, said rod
being detachably connected at one end.
4. In a duplicating machine, the combination
of a rotatable cylinder containing an ink pad and
a stencil, a stationary paper platform, a paper
stop and guide device, comprising a flat plate
having a stop and guide flange extended up
wardly, and also having an opening extended
through it transversely of the platform, a re
silient rod slidingly mounted on the platform
and having one end inclined downwardly at one
edge of the platform, and a means carried by
said end of the rod for forcing it away from the
edge of the platform and thereby bending the
central portion of the rod downwardly to force
the plate into binding frictional engagement with
the platform.
5. In a duplicating machine, the combination
of a rotatable cylinder containing an ink pad
and a stencil, a stationary paper platform and
a‘paper stop and guide device, comprising a flat
plate having a stop and guide flange extended
upwardly, and also having an opening extended
through it transversely of the platform, a resil
ient rod slidingly mounted on the platform and
having one end inclined downwardly at one edge
of the platform. and a means carried by said end
of the rod for forcing it away from the edge of
the platform and thereby bending the central
portion of the rod downwardly to force the plate
into binding frictional engagement with the plat
form, said latter means comprising a yielding 60
pad carried by the rod and a screw seated in the
downwardly inclined en-d of the rod for forcing
the pad against the platform.
6. In a duplicating machine, the combination
of a shaft, two supporting plates carried by the
shaft and each having a tapered opening, a
stencil holder detachably mounted between said
plates, tapered set screws seated in the stencil
holder and extending outwardly through said
tapered openings and whereby upon tightening
the screws the stencil holder will be accurately
positioned within the supporting plates.
‘
ALFRED E. GOODWIN.
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