Year: 1887

page_text: I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E. do hereby declare the nature of this 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 the invention is to design a machine in which a flexible stencil-plate
may be used between a pressure roller and an inking roller; and it consists, essentially
in placing the flexible stencil plate between the pressure roller and inking roller and
connecting the opposite ends of the stencil plate so that the said stencil plate shall be
held in position and prevented from clinging to the rollers while being carried back-
wards and forwards between them; the ink font being provided with a device by
which the supply of ink for the ink-roller may be increased or decreased as desired
substantially as hereinafter more particularly explained.
Figure 1 is a perspective view of this improved stencil copying machine.
Figure 2 is a sectional elevation of the same.
A represents standards secured to the bed plate B.
C is a case resting on a shelf B₁ between the standards A but made detachable so
that it may be readily withdrawn when desired.
D is the ink distributing roller fitted in suitable journals in the case C and resting
on an ink bed E as indicated in figure 2.
In front of the ink bed E which extends the full length of the roller D an ink
font F is formed in which an adjustable plunger G is placed. This plunger is sup-
ported on suitable brackets H by the screws I which are provided for the purpose of
raising or lowering the plunger G in order that the ink contained in the font F may
be caused to overflow on to the plate E when ink is required for the roller D or to
recede into the font when the operator finds the roller D supplied with too much ink.
The case C is made detachable froin the rest of the michine in order that when
the machine is not required for use the case may be withdrawn and closed with a
cover.

page_text: The roller K. is carried in suitable bearings in the standards A and when the case C
is in position as shown in figures 1 and 2 the roller D is held in contact with the
roller K.
A pressure roller L is carried in suitable bearing boxes b hinged, as indicated
in figure 1 on top of the standards A. A thumb screw d is provided for each box b
in order that the said box may be adjusted vertically for the purpose of moving the
roller L closer to or further from the roller K.
The stencil plate M is made of rice paper or any other suitable flexible material,
and is otherwise prepared in any ordinary way. Each end of the stencil plate M is
provided with a clamp N and these clamps are connected together by the cords O.
By connecting the opposite ends of the stencil plate M. by means of the cords O
the cords and the stencil plate form a continuous band; consequently when the
handle J is turned the stencil plate M draws at one end on the cords O while its
other end is drawn by the opposite ends of the cords keeping the stencil plate always
taut. In operation the stencil plate M has perforated on its surface in any suitable
manner the manuscript that is to be produced which is reproduced on the sheets of
paper carried with the stencil plate between the rollers D and K the ink from the
roller K being squeezed through the apertures in the stencil plate; consequently the
last impression taken will be as good as the first; the inking roller K being kept
continuously moistened by the roller D.
Having now particularly described and ascertained the nature of the said invention
as communicated to me by my foreign correspondent, and in what manner the same
is to be performed, I declare that what I claim is :-
1. An inking roller and a pressure roller arranged in connection with each other,
and one of them provided with a crank, in combination with a stencil plate carried
between the two rollers, substantially as and for the purpose specified.
2. An inking roller and a pressure roller arranged in connection with each other, and
one of them provided with a crank, an ink distributing roller in contact with the
inking roller and supplied with ink from a font, in combination with a stencil plate
carried between the pressure and inking rollers, substantially as and for the purpose
specified.
3. An inking roller and a pressure roller arranged in connection with each other
and one of them provided with a crank, in combination with a flexible stencil plate
carried between the two rollers, and having its ends connected together by cords or
other flexible coupling, substantially as and for the purpose specified.
4. An inking roller and a pressure roller supported by the same standards and arranged
in connection with each other, and one of them provided with a crank, in combination
with an ink distributing roller carried in a box independent of the standards supporting
the inking and pressure rollers and supplied with ink from a font provided with an
adjustable plunger, substantially as and for the purpose specified.
5. An inking roller and a pressure roller arranged in connection with each other by
standards, and one of them provided with a crank in combination with a stencil plate
carried between the two rollers, and an inking plate to supply the inking roller with
ink substantially as and for the purpose specified.
Dated this fith day of May 1887.