Improvements in the Method of and Apparatus for Printing Two Colours by Continuous Rotating Impression Cylinder Machines.
Year: 1894

page_text: Date of Application, 26th Feb., 1894
Complete Specification Left, 26th Nov., 1894-Accepted, 29th Dec., 1994
PROVISIONAL SPECIFICATION.
Improvements in the Method of and Apparatus for Printing Two
Colours by Continuous Rotating Impression Cylinder Machines.
We, WILLIAM HENRY DAWSON and ALLAN PARKER DAWSON, of Ashfield
Foundry, Otley, in the County of York, and JAMES STOTT of the same place,
Printers' Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object certain. improvements in what is known as
continuous rotating impression cylinder printing machines, by a novel combination
of parts so arranged that, each sheet of paper or the like as it passes through the
machine, receives two impressions of the same or different colours on one side of
each sheet from two separate formes.
We accomplish our object by mounting two impression cylinders of equal
diameter above the reciprocating table of the printing machine. Motion to one of
the cylinders is obtained by gearing it with any convenient part of the machine.
The cylinder is fitted with grippers, by which the respective sheets as they are fed
to the machine are conveyed for receiving the first impression, each sheet is then
transferred to an additional cylinder rotating continuously at the requisite speed,
which delivers it to the second impression cylinder rotating continuously for the
reception of the second impression, after which, it is transferred by any ordinary
delivery apparatus to a flyer or the like.
.
By constructing the machine so that the two impression cylinders rotate con-
tinuously and in the same direction, and combining with the same an intermediate
cylinder, the stroke or travel of the reciprocating type table may be of the same
length, as in machines having one impression cylinder of the same diameter as those
used according to our arrangement, and producing one impression only for each
stroke of the table; thus by our novel arrangement and combination, two colours
or two different impressions from two different formes on the same side of sheet
can be produced at the same rate as though only one impression was required.
Dated this 23rd day of February 1894.
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvements in the Method of and Apparatus for Printing Two
Colours by Continuous Rotating Impression Cylinder Machines.
We, WILLIAM HENRY DAWSON and ALLAN PARKER DAWSON, of Ashfield
Foundry, Otley, in the County of York, and JAMES STOTT, of the same place,
Printers' Engineers, 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 :-
This invention has for its object certain improvements in what is known as
continuous rotating impression cylinder printing machines, by a novel combination

page_text: of parts so arranged that, each sheet of paper or the like as it passes through the
machine, receives two impressions of the same or different colours on one side of
each sheet from two separate formes.
In describing our invention in detail, reference is made to the accompanying
drawing representing a side elevation of such portions of a printing machine as are
required to make clear our invention.
The bed frame A. distributing rollers B. and inking rollers C. may be of the
ordinary description, and reciprocating table driven in any convenient manner.
The two impression cylinders D. and E. are mounted on suitable brackets above
the reciprocating table, and motion to the impression cylinder D. is transmitted
from pinion F. gearing with wheel G. secured on the shaft upon which the said
cylinder is mounted.
Above the cylinders is placed a feed board H. from which the sheets are fed to
the grippers J. of first impression cylinder D. the sheet receiving its first
impression ou passing over the type bed or forme K. secured on reciprocating table.
The cylinder D. continuing its course, conveys the printed sheet to the additional
rotating cylinder L. driven by a wheel, gearing with one connected with the
impression cylinder D. the grippers J. of said cylinder on arriving at or about
point or line M. deliver the sheet to the grippers N. of the last mentioned cylinder
which conveys the sheet in the direction of arrow, until delivered to the grippers Q.
of the second impression cylinder E. rotating in the same direction as cylinder D.
and driven by gearing in connection with the transferring cylinder L.
The second impression is given to the same side of sheet on the latter passing
over the reciprocating type bed or forme P. and is delivered to the grippers R. of.
the continuous rotating cylinder S. which conveys and delivers the printed sheet to
the flyer T. operated in any convenient manner, which deposits it on the delivery
board U. The grippers on each cylinder are of the ordinary construction and may
be operated by any convenient method.
By constructing the printing machine so that two impression cylinders D. and E.
of the same diameter, continuously rotating in the same direction, and combining
same with an intermediate or transferring cylinder L. the stroke or travel of the
reciprocating table may be of the same length, as in a machine having one impression
cylinder only of equal diameter to those used on our improved machine, and
producing one impression only for each stroke of the table.
By our novel arrangement and combination, two colours or two 'different
impressions from two different formes, and on the same side of a sheet can be
produced at the same rate as one impression only by a single cylinder machine.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is,
1. The method of printing two impressions on one side of sheets of paper or the
like by a printing machine having two impression cylinders of equal diameter
rotating continuously and in the same direction.
2. A printing machine in which are combined two impression cylinders of equal
diameter, continuously rotating in the same direction and combined with an inter-
mediate or transferring cylinder all arranged and operated substantially in the
manner as herein before described..
Dated this 24th day of November 1894.
JOHN WAUGH,
Agent.