Year: 1885

page_text: I ALFRED JULIUS BOULT of 323 High Holborn, in the County of. Middlesex,
Engineer, do hereby declare the nature of this invention (a communication from
William Francis McKay of Toronto, Canada, Manufacturer,) and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
The invention relates more particularly to that class of copying-machines in
which the original manuscript written in aniline ink is transferred into a sheet of
plastic composition from which copies of the original are taken off; and the object
of this invention is to construct a machine in which the plastic impression material
may be readily renewed, and in which the copies of the original taken there from
may be rapidly and continually made without stopping the machine; and it con-
sists, essentially, in spreading the plastic material on to a thin sheet of paper or its
equivalent, and wrapping the said prepared paper onto a roller carried in a frame
and arranged to rest upon a similar roller having a roll of paper wrapped round it,
so that the roll of paper may be drawn off and receive impressions from the printing
roller, as hereinafter more particularly explained.
Figure 1 is a perspective view of my improved machine showing the prepared
sheet of Paper in the act of being placed upon its roller.
Figure 2 is a perspective view of the machine showing the paper being drawn
off and receiving the impression from the Printing Roller.
There are two systems of obtaining copies of an original writing in which this
Invention is applicable. The first one is that system in which the writing is
transferred on to a plastic composition from which impression copies are taken.
The second system is that in which the original is a stencil paper.
In adapting this Invention for the first system a thin coating of gelatine or
other plastic material is laid upon a sheet of paper and transfer in the ordinary
way the writing on to the said plastic surface.
In adapting this Invention for the second system the back of the stencil is
coated with ink.
So far as this Invention is concerned both prepared sheets are used in the same
manner that is to say, they are both applied to the roller used in my machine in
substantially the same way.
On reference to the Drawing, A. is what is termed the impression roller preferably
made of gelatine, or some other plastic material and secured to the spindle, B.
C. represents the sheet of Paper prepared in either of the ways hereinbefore
referred to It is placed round the roller A, and preferably caused to adhere
thereto by sponging it in the manner indicated in Figure 1.

page_text: It will be noticed in Figure 1 that the spindle, B, rests in notches, a, during the
period that the sheet of paper is being applied to its surface.
When the prepared paper has been properly placed upon the roller, A, its
spindle, B, is lifted out of the notches, a, and dropped into the slot, b. into which
slot the spindle of the roller, E has been previously placed. When the paper, C,
has been prepared according to the first system herein before mentioned the
impression copies are obtained by drawing out the paper on the roller, E. as
indicated in figure 2. As the surface of the prepared paper, C. on the roller, A.
rests upon the paper on the Roller E the said paper was drawn out as indicated in
Figure 2, receives the impression of the writing on the paper, C. at each revolution
of the Roller, A. In this way a number of impressions may be taken of the
writing on the prepared paper, C. by simply drawing the paper on the roller, E off
the said roller.
As a rule the weight of the roller, A, will be found sufficient to cause the
printing described, but with the view of maintaining a constant and proper
pressure at each end of the spindle, B, is provided a spring, E arranged as indicated
in the drawing.
When the stencil paper is placed upon the roller, A, impressions are taken from
it on separate sheets of paper and for that purpose a table, G, is provided on which
the sheets of paper to receive the impressions are placed. In this arrangement it
will be found necessary to provide the spindle of the roller E with a crank handle, H
and by turning the said handle so as to carry the sheet of paper through the rollers
the said sheets may be fed through between the rollers just like in an ordinary
printing press, receiving the impressions from the Stencil paper C.
By placing the paper prepared in either of the above ways on to a Roller and
making copies from the said roller the sheet of paper is merely removed from the
roller when the necessary number of impressions have been obtained and the
roller, A is ready to receive another prepared sheet-This is a very rapid way,
not only of obtaining impression copies but also of changing the original from
which the impression copies are to be obtained.
It will be noticed that in the adaptation of this Invention of the first system
herein before referred to that the important feature of the Invention consists in
covering a sheet of paper with a thin coating of plastic material which when placed
on an elastic surface will receive the impressions to be transferred and when a
sufficient number of copies have been taken therefrom may be removed from the
elastic surface which is ready without further preparation to receive another sheet
of prepared paper.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed as communicated
to me by my foreign Correspondent I declare that what I claim is
1. A sheet of paper covered with a thin coating of gelatine or other suitable
material and fixed to a yielding surface substantially as and for the purpose
specified.
2. As an improved copying-machine a roller A having attached to its surface a
sheet of prepared paper C and suitably carried in a frame D in combination with
a roller E arranged to act in connection with the roller A substantially as and for
the purpose specified.
Dated thin 441
100K