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Патент USA US2090773

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Àug. 24, 1937.
D. woLFsoN
Filed Aug. 16, 1935
3 Sheets-Sheet 1
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Ú _mds
Aug. 24, 1937.
D. woLFsoN
Filed Aug. 16, 1935
5 Sheets-Sheet 2
Aug. 24, 1937. .
Filed Aug. 16, 1955
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Patented Aug. 24, 1937
means .
PATENT orrice
David Wolfson, Far Rockaway, N. Y.
Application August 16, 1935, Serial No. 36,464
5 Claims. (Cl. 101-133)
The present improvements relate, in general, to bodiment of the improvements include a flat
duplicating machines and more particularly to
novel means and methods for multiplying copies
from a single master copy.
A primary object of the improvements, among
others, is to provide novel apparatus and methods
for insuring a maximum. number of perfect copies
from a master record.
Another object is to provide a, novel combi
10 nation of elements which is economical to man
ufacture and operate.
A further object is to provide a device Where
in the master copy is maintained in fixed posi
tion and the sheets to be imprinted are me
l5 chanically applied thereto. Another object is to
provide a novel sheet feeding and dampening
unit for traversing the fixed master copy, and
for impressing a sheet thereon during travel.
Another object of the improvements is: to- pro
20 vide a platform for holding the master copy flat
wise thereon and a reciprocating carriage for
supplying and moistening a sheet of paper and
thereupon imposing and impressing the sheet
on the master copy. Means for accomplishing
25 this concurrently with traverse of the carriage,
constitutes a further object of the invention.
The simplification of elements and elimination
of parts is a. further desideratum.
In this re
spect it is an object of the improvements to pro
30 vide a master roller which is moved by traction
across the master copy and imparts rotation to
feed and moisture rollers, as well as cooperates
to propel, dampen, apply and impress a sheet
of paper onto the master copy. Another object
35 is to provide a novel carriage unit for accom
legs I3 for supporting same.
While the glass
plate may be mounted in any convenient man~
ner, without departing from the invention, in
the illustrated embodiment, it constitutes a hori
Zontal platform III upon which the master copy 10
II is fastened ?latWise as by studs or other an
choring means I4. As illustrated the master
copy II lies ñatwise over only a portion of the
platform, although-it may occupy the entire
Means for superimposing a sheet of paper on
said master copy II is provided in a carriage
I5 which may be reciprocated across the plat~
form and master copy. The traverse of this
carriage is preferably, although not necessarily,
facilitated by guideways or tracks IB in the form
of rods extending «along vopposite sides of the
platfonn I0. Four eye-bearings I'I threaded
upon said rods operate to suspend the carriage
I5 across and above the platform and master 25
copy. A hand grip I8 on said carriage may be
grasped for reciprocating said `carriage and bear
ings along said rods and platform.
As illustrated several cylindrical rollers are
journaled on carriage I5 so as to be elevated or
depressed at will. In the present embodiment
three such rollers 20, 2| and 22 are illustrated
although the upper feed roller may be dispensed
with in some embodiments. The feed roller 2U,
the mioistening roller 2I and the compression 35
and impression traction roller 22 are all main
Other objects include the provision of novel
details o-f construction and simpliñed arrange
ment and combination of parts which contribute
tained in a suspended position above the plat
form I0. Rotation is imparted to these three
rollers by providing means whereby the traction
and impression roller 22 may be depressed intoi 40
contact with the surface of the platform, where
upon movement of said carriage across the plat
form by pushing handle IB will cause roller 22
to rotate -by the resulting traction.
Further advantages and objects Will be apparent
to those skilled in the art upon reference to the
accompanying specification and drawings in
Figure 1 is a plan view of one form of the
present improvements.
Figure 2 is a section through line 2_2 of Fig
ure 1 but with the carriage over the master copy.
Figure 3 is a View similarI to Figure 2 with the
50 carriagel shown impressing a sheet of paper onto
the master copy.
Figure 4 is an end elevation of the carriage on
the platform, With parts removed.
suitable material, it is preferably made of glass
mounted on a sturdy backing I2 provided with
plishing the foregoing functions manually.
40 to durability, ease of v operation and simplicity.
member for supporting the master copy II. Al
though this flat member may be of metal or other
Figure 5 is a modification.
Referring to the drawings, the present em
Various expedients may be resorted to for 45
suitably mounting the rollers 2E), 2| and 22. In
the illustrated embodiment a portion of thei car
riage is movable relative to the remainder and
the rollers are mounted thereon. The movable
carriage portion comprises a frame 24 pivoted at 50
25 to the carriage portion I5 having the bearings
I l. As more clearly seen in Figure 1, this frame
24 is rectangular, having two opposite short sides
in which the rollers are journaled and two op
posite longer sides, one of which has the in-- 55
tegral handle I8 and the other the moisture supply
tank 21.
Referring to Figures 2 and 3, the roller 22, jour
naled in the pivoted frame 24 protrudes beneath it
5 into close proximity with the platform. The
frame 24 is eccentrically pivoted at 25 so that the
roller at the opposite side from the pivots, tends
to descend toward the platform by gravity.
This movement is arrested and the roller 22 and
10 frame 24 are maintained suspended clear of the
patform by a yieldable connection 28. lin the
present embodiment a stud mounted in the frame
of suitable carbon paper, so that the carbon or
inked face of the paper is in engagement with the
under face of the paper sheet. Upon disposing
these sheets in a typewriter, a duplicated copy
of the writing is made on the reverse side of the
paper sheet in reverse. Therefore, after the de
sired material is typed, the sheet comes out as a
master copy having the proper typing on one face
and a duplicate reverse copy on the other face
This master copy II with the ink characters
in reverse is laid flatwise upon the platform I0
24 extends through a bifurcated member 29, andiv ‘ 'and held in position by studs I4 (see Figure l).
Asheet of paper 5I is placed in chute 48 and
descends by gravity to a position between rollers
pressure applied to handle I8, will compress spring 2U and 22 (see Figure 2). Since yieldable con
38, and permit roller 22 to` contact the platform. nection 28 keeps roller 22 clear of platform I0,
Upon release of pressure on` the handle, the the handle I8 may be grasped and the carriage I5
spring returns the frame and roller to elevatedy slidably moved from the position in Figure 1, over
and clear of the master copy I I, to the fore por
2O position.
The feed roller 2U and moisture roller 2 I, both tion of the platform, as seen in Figure 2. Ob
viously the printed material is placed on the
smaller than roller 22, are mounted in engage
master copy in such a position that it will be
ment with roller 22 and derive their rotary move
ment therefrom. As more clearly seen in Figure centered on the sheet 5I when superimposed
25 4, the rollers 28 and 2| are journaled in inclined thereon by the carriage. The absorbent 38 has
previously been supplied with a highly volatile
bearings 33 and 34 and their trunnions are en
liquid which may be evenly distributed in a ñlm
gaged by spring clips 35 and 36 which resilient
ly urge them along the inclined bearings for of moisture on the periphery of roller 2|, as is
resilie-ntly maintaining them against the roller 22, common in the art.
An impression or copy is now ready to be made 30
The moisture supply means for roller 2| may
sheet 5I. The handle I8 is depressed and
take various forms. In the embodiment under
roller 22 is held in engagement with platform I0
description, a pan or tank 21 extends across the
frame and is inclined slightly toward roller 2|. and master copy || (dotted lines position, Fig
ure 4). While thus depressed, the carriage is
Felt, waste or other liquid absorbent 38 is dis
35 posed in the pan, and has an upturned edge pushed along the master copy |I and platform
I0, and the rotation by traction of roller 22 ro
engaging roller 2| which preferably has a metal
surface. A removable keeper-rod 48 is resiliently tates rollers 20 and 2|. Rollers 22 and 28 co
maintained against the absorbent edge 39 against operate to grip and advance the sheet 5I toward
the moistening roller 2| and the latter cooper
roller 2| by spring clips 4I.
ates with the roller 22 to grip and advance the ,40
A removable: receptacle 45 for a supply of paper
45 is provided with legs 41 which rest in holes in sheet toward the master copy II. In doing so,
the carriage I5. A removable gravity chute 48 the roller 2| moistens the under face of sheet
5I. As the sheet 5| travels toward the master
also has legs 49 resting in holes on said carriage.
The chute has a bottom slot or opening 50 through copy the location of the moisture roller 2| is
45 which the individual sheet 5| is fed by gravity to such that it causes the edge of the sheet to ex- . .45
the rollers. As illustrated, chute 48 is aligned tend towards the trough between roller 22 and
with the contacting surfaces of rollers 2U and 22 copy II with the result that the sheet 5I is di
whereby the sheet 5| may be fed by gravity into rected under the roller with the moistened face
the trough formed by their curved surfaces.l Upon superimposed on the master copy. Continued
a spring 38 engaging collar 3| and member 29
l5 serves to maintain the frame elevated. However
50 rotation of the roller 22 in a counterclockwise
direction, rollers 28 and 2l rotate in anopposite
direction and sheet 5| is gripped between rollers
22 and 22 and drawn downwardly until it is
gripped between moistening roller 2| and ro-ller 22,
, whereupon the sheet is moistened on its under
side by metal rollery 2| and drawn downwardly
toward platform I8, whence it is applied thereon
by roller 22, with the moistened face down.
An apron or shield 55 extends across the frame
and protrudes between rollers 28 and 2|. 'I'his
member protects the upper roller 2U from mois
ture from the absorbent on roller 2 I, prevents the
absorbent from being inadvertently dragged be
tween the rollers, and has a down turned'inner
.- lip which serves to direct the down coming edge
of paper 5| between rollers 2| and 22, and pre
vents improper travel of the sheet.
In operating the illustrated mechanism for
practicing the improved methods, a master copy
7() is made. This master copy may be produced
by means of writing, printing or drawing on
suitable paper with copying ink, the material toI
be copied. Manifestly, this may be accomplished
in an ordinary typewriter by taking a sheet of
75 paper and placing beneath same an inverted sheet
advance of the carriage causes the rotating roller o
22 to impress the entire dampened sheet 5I onto
the copy II. After every part of the sheet has
been thus impressed on the copy and the carriage
is free of the sheet 5 I, handle I8 may be released,
whereupon roller 22 is raised. The printed
sheet 5| may now be lifted off of copy II and
laid aside. Another sheet may now be taken
from supply 46, placed in chute 48 and carriage
I5 returned to the fore part of platform I0 for
making another impression. Accordingly, a copy 60
may be made with each travel of the carriage
from right to left in Figure 1, the carriage being
idle during return travel from left to right.
The roller 22 is preferably made of resilient
material such as rubber, so as to perform more 65
efliciently in its various capacities.
This roller
serves as a feed roller in cooperation with roller
>2|! and helps to' uniformly moisten the paper by
cooperating with roller 2|. Furthermore, the
roller 22 guides the paper to the platform and
impresses it firmly against the master copy. The
resilience of the roller 22 facilitates this impres
sion and keeps the sheet steady by taking a
purchase on it by friction, so as to prevent slip
page. The roller 22 likewise supplies the power
for rotating the other rollers and does so by the
traction resulting from friction between the
roller 22 and the platform and copy. No slipping
of the roller or sheet relative to each other or
relative to the copy results from this novel ar
By locating the moisture roller 2| below the
axis of roller 22, the sheet 5| is directed toward
the under side of roller 22, thereby insuring its
Since the moisture on roller 2| is
so highly volatile, this roller is positioned at the
location illustrated, so that the sheet will be
freshly moistened immediately before it engages
the master copy.
The sheet therefore has no
15 opportunity to dry and fail to take the impression.
In Figure 5, a modified form of moisture means _
is illustrated. An absorbent roller 60 is interposed
between the absorbent 38 and moisture roller 2|.
This roller 60 obtains moisture from the ab
sorbent 38 and transfers it to the roller 2|
whence it is transferred to the sheets 5|. Other
wise the organization remains the same.
I claim:
1. A duplicating machine comprisingl a plat
25 form, a carriage adapted to be reciprocated across
3. A traction driven duplicating machine com
prising a platform for holding a master copy,
guìdeways along opposite sides of said platform,
a carriage on said guideways and suspended
across said platform, a chute on said carriage
for feeding a single sheet to be printed, a recep
tacle on said carriage for supporting one or
more sheets in storage, a roller depending from
said carriage and yieldably mounted, a tension
device for holding said roller above the platform 10
permitting depression of said roller into engage
ment with said platform whereby rotation by
traction is imparted to said roller as said car
riage is moved along said platform, a paper feed
roller and a moisture roller driven by said ñrst 15
named roller, said rollers being positioned for
directing a moistened sheet beneath said ñrst
named roller onto said platform as said carriage
advances thereover.
4. A duplicating machine comprising a plat~ 20
form, a reciprocating carriage suspended over
said platform, means on said carriage and mov
able relative thereto for applying a sheet to said
platform and yieldable means connected with said
carriage for normally maintaining said movable
said platform, a feed roller for advancing a sheet
means above said platform, and means for vary
of paper, and a moisture roller and a compres
ing the degree of yieldableness of said yieldable
sion roller for moistening such sheet and press
ing it onto said platform and guard means asso
30 ciated with said rollers for shielding one of said
rollers from moisture and guiding the paper.
2. A duplicating machine comprising a plat
form, a carriage adapted to be reciprocated across
said platform, a frame member movable relative
35 to said carriage, a compression roller on said
frame, a paper feed roller engaging said com
pression roller, a moisture roller engaging said
compression roller, and means for concurrently
rotating said rollers as said carriage is recipro
40 cated and guard means associated with said
rollers for shielding one of said rollers from
moisture and guiding the paper.
5. A traction driven duplicating machine com 30
prising a platform for holding a master copy,
guideways along opposite sides of said platform,
a carriage on said guideways and suspended across
said platform, a roller depending from said car
riage and normally above said platform yieldably 35
mounted, and a tension device permitting de
pression of said roller into engagement with said
platform whereby rotation by traction is im
parted to said roller as said carriage is moved
along said platform.
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