Improvements in Stencil Printing Machines.
Year: 1896

page_text: Date of Application, 28th Jan., 1890
Complete Specification Left. 15th Aug., 1896-Accepted, 26th Sept., 1896
Date of Application, 28th Jan., 1890
Complete Specification Left. 15th Aug.. 1896-Accepted, 26th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Stencil Printing Machines.
HERMAN JOFEH of 9 Grossestrasse, Mitau, in the Province of Courland,
Russia, Printer do hereby declare the nature of my said invention to be as
follows:-
The object of my invention is to effect improvements in that class of machines
used for obtaining copies of writing, drawings and he like from stencils formed
of prepared paper.
According to my invention, I provide a platen or table fitted with a roller at
each en 1, carrying an endless band adapted to pass over and under the platen.
Upon the platen I mount two longitudinal guide rods for supporting a sliding
frame carrying the inking roller or rollers. The roller is preferably so mounted
that it is normally out of contact with the stencil, but on the operator moving the
sliding frame forward by means of a pivoted alle the roller is automatically
pressed on to the stencil and on moving the sliding frame backward the roller is
again thrown out of contact with the stencil.
An inking slab or disc capable of being rotated is fitted to the platen and above
the inking roller for supplying the roller with ink.
The sliding frame carries, on one side, a stud or other projection to which both
ends of a band or chain are fastened. This band passes round two pulleys, one
fitted to the edge of the platen and free to revolve, the other fitted to the axle of
one of the rollers, carrying the endless hand, and free to revolve in one direction
only, a pawl and ratchet being provided on the pulley.
The stencil frame, carrying the stencil, is fitted above the platen ant preferably
supported by springs with sufficient space to allow the paper to pass under same.
The back end of the platen is fitted with a feeding appliance which, when the
sliding frame is being moved in a backward direction, presses the paper against
the endless band causing the same to be moved into position under the stencil, the
feeding appliance being rais dont f action at the end of the backward stroke of,
and by, the sliding frame. The feeding appliance is also fitted with an automatic
support to retain the same in a raised position when not in use, the movement of
the endless band causing such support to yield and allow the feeding appliance to
fall into action. This support also serves as a register for the paper.
The action of the apparatus is as follows:-The paper in sheets or from a roll
is laid on the band under the feeling appliance, the stencil frame having been
placed in position and the sli ling frame being moved to the forward end of the
platen. The sliding frame is then moved backward, causing the paper to travel
under the stencil to the required position. During this stroke the inking roller is
automatically raised from the stencil, but on moving the sliding frame forward the
roller is pressed on to the stencil thereby causing the ink to percolate through the
perforations and print on the paper as will be readily understood. The next
backward stroke causes the printed paj er under the stencil to be moved away and
a fresh portion placed in a position to be printed, and so on.
Daith Innuo 1996
GEO.
DOWNING,
8 Quality Court, London, W.C., Agent.

page_text: I, HERMAN JOFEH of 9 Grossestrasse, Mitau, in the Province of Courland,
Russia, Printer, do hereby declare the nature of ny said invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The object of my invention is to effect improvements in that class of machines
used fr obtaining copies of writings, drawings and the like from stencils formed
of prepared paper.
And in crder that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings in which
similar figures of reference indicate corresponding parts.
Fig. 1 is an elevation and Fig. 2 a plan of a stencil printing machine constructed
according to my invention.
Figs. 3 and 4 are sectional elevations.
Figs. 5 6 and 7 are detail views of modifications of parts of the apparatus.
According to my invention, I provide a platen or table 1 mounted on legs or
supports 2 and fitted with rollers 3, 4, one at each end. The rollers 3, 4 carry an
endless band 5 adapted to pass over and under the platen. Upon the platen
I mount two longitudinal guide rods 6, 6, for supporting a sliding frame 7 carrying
oue or more inking roller or rollers 8. The roller is mounted between two
arms 9, 9, integral with the shaft 10 pivoted to the frame 7 as shown. The ends
of the roller shaft are provided with small rollers 11, 11 which act upon the
stencil frame as bereinafter described. The shaft 10 is formed with a boss
carrying a fork 12 and a handle 13, the whole being so arranged that when the
frame is moved by the handle 13 in the direction of the arrow (Fig. 3) the
inking roller 8 is automatically pressed on to the stencil 14 and on the frame being
moved by the handle 13 in the direction of the arrow (Fig. 4) the roller 8 is again
lifted out of contact with the stencil 14. 15 is a pin integral with the frame 7 and
provided with nuts 16 for regulating the pressure of the roller S upon the stencil
and for retaining the roller in a raised position, when it is desired to change the
stencil by means of the fork 12. The pin 15 is preferably fitted with a coil
spring or springs, not shown on the drawings so as to cause the roller to be
normally out of contact with the stencil.
An inking disc or slab or ink distributing rollers may be fitted above the platen
if desired in such a manner that when the frame 7 is being moved backward as
shown in Fig. 4 and the roller 8 is in a raised position, the inking disc or slab or
the ink distributing rollers supply the roller 8 with a fresh charge of ink ready for
the next forward or printing movement as will be readily understood.
The sliding frame 7 is provided with an arm 17 (Figs. 1, 2, 3 and 4) to which
both ends of a band or chain 18 are fastened. This band passes round two
pulleys 19 and 20, 19 being fitted to the edge of the platen I and free to revolve in
either direction and 20 being loosely mounted on the axle of the roller 4 which
carries the endless band 5. The pulley 20 is free to revolve in ene direction only,
a ratchet and pawl being provided as shown or a clutch may be fitted to attain the
same result.
Instead of connecting the arm 17 with the band 18 and using an idle pulley 19
and ratchet mechanism on the pulley 20, 1 attach the band 18, to one edge of the
travelling band 5 and grip the same by mechanism hereinafter described with
reference to Figs. 5 and 6. This mechanism or gripper consists of a jaw 30
capable of sliding through and on the arm 17, the sliding jaw being retained in a

page_text: guide slot 31 by a screw 32 as shown. The upper end of the jaw 30 is provided
with a contact surface 33 upon which a lever or cam 34 secured to the roller shaft
acts to depress the jaw and thus release the band. The gripping action between
the jaws is preferably effected by means of a spring 35 acting between the uppe
surface of the arm 17 and the head of a holt 36 secured in the jaw 30, but this
action may be effected by a suitable link or other motion connected with the roller
shaft 10, so that the backward motion of the carriage causes the band to be gripped
whereby the portion of the band 5 above the platen is moved forward. In using
this modification the rollers 3, 4 and the upper surface of the platen are grooved to
accommodate the extra thickness of the band 18 attached to the travelling endless
band 5.
The stencil frame 21 carrying the stencil 14 is fitted above the platen I in such
a manner that it may move up and down i.e. vertically but is prevented from
moving longitudinally by suitable stops. The vertical movement is caused by
suitable springs placed under the stenci! frame 39 which tend to lift the stencil
away from the band 5 thus providing sufficient space for the paper to pass under
the stencil without becoming smeared. As before described the inking roller
shaft is provided with small rollers 11, 11 which, when a print is about to be
taken, press the stencil frame down upon the paper previously to the contact of the
inking roller with the stencil, the rollers 11, 11 being made adjustable to the depth
of the stencil frame if desired.
The back end of the platen 1 is fitted with a feeding appliance consisting of a
frame 22 pivoted to the platen at 23. The frame is provided with two or more
presser wheels or rollers 24 mounted on one shaft and an adjustable pivoted
support or register 25 for retaining the frame in a raised position. The frame 22
is raised by the backward motion of the sliding frame 7, the inclined surface 26 of
the sliding frame passing under and thereby raising the lifter 27 formed with or
adjustably connected to the frame 22 as shown. 28 is a knob or handle for raising
the frame 22 by hand when found necessary. When the sliding frame 7 is being
moved in a backward direction as in Fig. 4, the presser wheels 24 press the
paper 29 to be printed against the endless band 5 causing the same to be moved
into po-ition under the stencil until the sliding frame 7 lifts the feeding appliance
out of action, which takes place at the end of the backward stroke. The raising of
the frame 22 permits the support 25 to assume its vertical position and on the
sliding frame 7 being moved forward supports the frame 22 and also serves as an
adjustable register for the paper when sheets are used. The forward movement
of the endless band 5 causes the support 25 to yield and allows the feeding
appliance to again come into action. It will thus be seen that the support
automatically puts the feeding arrangement into action at the commencement of the
backward stroke of the sliding frame.
In Fig. 8 a modification of the feeding arrangement is shown in which, a shift 40
is pivoted to the supports 2. This shaft is provided with arms 41 carrying a
spindle 42 on which two or more presser wheels 24 are mounted. On the opposite
side of the shaft 40 register arins or stops 43 are fitted, the shaft being also
provided with an arm or lever 44 to be acted upon by the frame of the carriage 7.
In this case the presser wheels and the register stops act alternately instead of
simultaneously.
The action of the apparatus shown in Figs. 1 to 4 is as follows:-The paper
from a roll or in sheets is laid on the band 5 under the presser wheels 24, the
stencil frame 21 having been placed in position and the sliding frame 7 being
moved to the forward end of the platen 1. The frame 7 is then moved backward
causing the paper 29 to travel under the stencil frame 21 to the required position.
During this stroke the inking roller 8 is automatically raised from the stencil 14
and the feeding appliance lifted, but on moving the frame 7 forward the roller 8 is
pressed onto the stencil 14 thereby causing the ink to percolate through the
perforations and print on the paper as will be readily understood, the feeding
appliance remaining in a raised position. The next backward stroke causes the

page_text: support 25 to yield, the printed paper under the stencil to be moved away and a
fresh portion to be placed in position to be printed and so on.
Provision may be made for supporting a roll of paper at the feeding end.
Although I have shown the inking roller 8 mounted between arms 9 integral
with the shaft 10 in Figs. 1 to +, I find it advantageons to mount the roller 8 in a
frame 37 which is pirotel at 38 to the shaft 10 as shown in Fig. 7, the rollers 11
being mounted on the shaft 10 independently of the frame 37. By this means the
roller Santomatically assumes a position parallel with the platen whereby an even
pressure is ensured.
Having now particularly de-cribed and ascertained the nature of iny said iuven-
tion, and in what manner the same is to ho performed, I declare that what I
claim is
1. The improved stencil printing machine, substantially as herein before described
and illustrated by the drawings.
2. In a stencil printing machine as aforesaid the combination of a platen fitted
with an intermittently rotating hand; a travelling carriage operating the band;
a pivoted inking roller mounted relatively to the operating handle so that the
roller is automatically pressed upon the stencil and raised therefrom, according to
the direction of the movement, and an automatic feeding appliance, together
operating substantially as and for the purposes hereinbefore described and
illustrated by the drawings.
3. In stencil printing machines, mounting the inking roller, relatively to the
operating handle, so that the roller is automatically pressel upon the stencil and
in like manner raised therefrom, according to the direction in which the handle is
moved, substantially as and for the purposes herein before describe and illustrated
by the drawings.
4. In a stencil printing machine as aforesaid, the combination therewith of a
gripper for gripping the edge of the travelling band, constructed, arranged and
operating substantially as herein before described and illustrated by Figs. 5 and 6
of the drawings.
5. In a stencil printing machine as aforesaid, the combination therewith of an
inking roller mounted in a frame pivotally attached to the roller shaft, together
operating substantially as herein before described and illustrated by the drawings.
6. In a stencil printing machine as aforesaid, the method of and means and
appliances for automatically raising and depressing the stencil frame, substantially
as and for the purposes herein before described and illustrated by the drawings.
7. In a stencil printing machine as aforesaid, the construction, combination and
arrangement of mechanism, whereby the paper or other material to be printed
upon, whether in sheets or from a roll is automatically fed into and delivered from
under the stencil frame, substantially as and for the purposes herein-before
described and illustrated by the drawings.
8. In a stencil printing machine of the description aforesaid, the combination
therewith of feeding mechanism consisting of presser wheels mounted in a suitable
frame or on a shaft provided with register stops or supports operating substantially
as hereinbefore described and illustrated by the drawings.
Thatod 17th Awoust 1906
GEO.
DOWNING,
8 Quality Court, London, W.C., Agent.