IMPROVEMENTS IN PRINTING MACHINES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Charles Pollak at the Office
of the Commissioners of Patents on the 16th August 1883.
CHARLES POLLAK of 54 Wool Exchange Coleman Street in the City of London
IMPROVEMENTS IN PRINTING MACHINES
The object of my Invention is to improve the present Printing Machines in such
a manner as to enable me to print from one block of type in different colors in one
operation.
To accomplish this I place over the type from which I am going to print as
many color Rollers as colors are required. The circumference of these Rollers I
make as near as possible equal to the space to which I am placing the Type blocks.
On each of these Rollers I stick in those places in which I want the different colors
applied raised pieces of paper or india rubber or any other suitable material in such
a manner that the Type in passing over the Roller touches the same only in those
places in which the raised pieces are stuck on. By this means I distribute the
different colors only in those places in which they are required, and therefore am
able to print in different colors from one type in one operation.
This invention is applicable to circular or flat printing and all lithographing
Machines and I claim as my Invention the application of raised pieces fixed to the
color Rollers for applying colors in different places direct on the Type or indirect
by a medium roller.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Pollak in the Patent Office on the 16th February 1884.
CHARLES POLLAK of 54 Wool Exchange, Coleman Street in the City of London
"IMPROVEMENTS IN PRINTING MACHINES '
"
The object of my invention is to improve the present printing machines in such
a manner as to enable me to print from one block of type in different colors in one
operation.
To accomplish this I use in combination with the type, from which I am about
to print, as many colour rollers as there may be colours required.
The circumference of these rollers I make as nearly as possible equal to the
space occupied by the type or printing surfaces. On each of these rollers. I fix at
those places in which I desire color to be applied raised pieces of paper or india
rubber or any other suitable material in such a manner that the roller in its
rutation shall touch the type or printing surface only in those places where the
raised pieces are fixed.
By these means I-distribute the different colours only in those places in which
they are required and am therefore enabled to print in different colours from one
form or printing surface at one operation.
This invention is applicable to circular or flat printing and to lithographic
printing machines.
And in order that my invention may be more clearly understood and readily
carried into effect I will proceed aided by the accompanying Drawings more fully
to describe the same."
DESCRIPTION OF THE DRAWINGS
Figure 1 represents parts of a cylinder printing machine with my invention
applied thereto. Figure 2 shows a similar view of the same parts with the
addition of an intermediate inking roller as herein after described.
Figure 3 represents my invention applied to a printing machine in which a
reciprocating type bed or printing surface is used. Figure 4 represents my
invention applied to a similar machine to that shown at Figure 3 but with the
colour or inking rollers so arranged as to deliver their ink to an intermediate roller
which is us d to supply all the various colored inks to the type bed or printing
surface and Figure 5 represents a side or plan view of one of my improved colour
or inking rollers.
In all the figures like parts are marked with similar letters of reference.
a represents the type cylinder or reciprocating type bed or other printing surface.
b. b. b. represent the colour or inking rollers constructed and a ranged according to
my invention in the manner hereinafter described and c. c. c. are inking rollers
which (aided by separate ink ducts and distributing rollers for each as is well
understood) are employed for supplying the rollers b. b. b. with the different
colored inks.
In the arrangements represented at Figures 1 and 3 the colour or inking
rollers b. b. b. are caused to deliver their ink directly to the type cylinder or other
printing surface a but in those shown at Figures 2 and 4 an intermediate roller d
is employed to receive the various coloured inks from the several rollers b. b. b. and
to deliver the said ink to the printing surface.
e Figures 1 and 2 represents the impression cylinder which cylinder is not shown
in the other figures of the drawing.

page_text: The colour or inking rollers 6. b. b. are according to my invention constructed
and arranged in the following manner.
On each roller b I fix in any convenient manner blocks b₁ of paper cardboard
india rubber, printers roller cemposition or other suitable material capable of
receiving and delivering a supply of ink without injury to the printing surface.
Those blocks b¹ may be either glued, nailed or screwed to the rollers or they may
be produced by cutting away parts of the body of the material forming the
surface of such rollers and such blocks b' are so shaped and arranged on the
rollers bas to deliver their supply of ink to the printing surface only at such parts
as the particular colored ink supplied to each roller b is required to appear in the
impression. Thus each roller b will supply its particular colored ink to the form
or printing surface at the parts for which its blocks b' are prepared and arranged
and no two rollers b will ink the same parts but their combined action will effect
the complete inking of the form or printing surface with the desired arrangement
of colouis.
The circumference of each of the rollers b. b. b. must be at least equal to the
length of printing surface they have to ink in one direction whilst their length
must be sufficient to extend the full length of the printing surface they have to ink
in the other direction and the said rollers must be geared with or in relation to the
type cylinder or frame carrying the form or other printing surface in such manner
that they shall receive a rotary motion in exact accordance with the motion of the
printing surface and of the same surface speed thereby ensuring that each block 6'
shall always come exactly over that portion of the printing surface with which it is
arranged to act and that without any sliding or rubbing action thereon.
Having thus described the nature of my said invention and the mode in which
I carry the same into effect I would have it understood that I do not confine
myself to the exact details herein shown and described so long as the peculiar
character of my invention be retained but what I do claim is :-
First The employment of colour or inking rollers b provided with raised
blocks b' so shaped and fixed as to be capable of inking only those parts of a
printing surface to which it is desired that the individual blocks should deliver
their supply of particular coloured ink substantially as herein shown and described.
Second The employment of a series of colour or inking rollers b provided with
raised blocks b' such rollers being supplied with different coloured inks and so
arranged and geared as by their combined action to completely ink the form or
printing surface with various colored inks arranged as desired substantially as
herein shown and described.
In witness whereof I the said Chasles Pollak have hereunto set my hand and
seal this Eighth day of February in the year of our Lord One thousand eight
hundred and eighty four.
CHARLES POLTAR