Improvements in Printing Presses.
Year: 1897

page_text: Improvements in Printing Presses.
WILLIAM HENRY REYNELL TOYE, of 1835 Clearfield Street, in the City and
County of Philadelphia, in the State of Pennsylvania, United States of America,
Irinter, 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 :-
"My invention relates to the construction of printing presses and is particularly
adapted for use in what are called multiple colour printing presses. The object
of my invention being to provide a press of this class which will not require
curved type forms and which, at the same time, will be of simple and efficient
construction,
The nature of my improvements will be best understood as described in connection
with, the drawings in which they are illustrated, and in which,
T
Figure 1 is a side elevation of a press constructed in accordance with my
invention.
Figures 2 and 3 details of the construction, and
Figure 4 a plan view of the press.
A indicates the frame of the press, 13 the driving shaft, which is here shown
with fast and loose pulleys B', B, and a worm B gearing with a worm wheel C¹
secured to the shaft C. The shaft carries what I may call, a roll, the essential
parts. of which, or parts carried by which, are cylindrical surfaces CC³ adapted to
support and actuate the carrier which I preferably make flexible, as indicated at 1',
and provide with a series of grippers, as indicated at and F. The gripping
mechanism should actually engage with the surfaces of the cylinders C so as to
ensure a positive motion in the carrier, and this can be accomplished by providing
suitable recesses, as indicated at 3, into which the gripper mechanism fits when
in contact with the driving cylinder. CC indicate positions of an irregularly
shaped gear wheel which ongages with a correspondingly formed gear wheel D³ D
secured on the shaft D or on the roll, so to speak, supported by said shaft. The
portions of the last mentioned gear wheel are plain and flat, while the
portions D are circular. The form, therefore, of the portion of the first
mentioned gear wheel must be such as to drive the flat portion of the driving
wheel, while the portion C will be a segment of a circle corresponding in diameter
with the circle of the portion 10%, and of a length equal to said portion. It will
be seen that the two gears will revolve at the same time and will complete each
revolution simultaneously, but of course the speed of the revolution will vary at
different points in accordance with the irregular outline of the two gear wheels.
CC etc. are impression surfaces revolving with the shaft C and corresponding
in outline to the pitch line of the portions of the gear wheel, while D D³ etc. are
type forms corresponding in position with the flat portions of the gear wheel
on the shaft D and so arranged that the face of the type will correspond with the
pitch line of the said teeth. K K are bearer surfaces, corresponding in outline
with the surfaces of the impression surfaces C³, and L L' are bearer surfaces
corresponding with the flat type forms D³. These bearer surfaces K and L are
brought into contact at the same time that the type and impression surfaces come
into contact with each other, and they are to be formed so as to keep a close and;

page_text: "
so to speak, driving contact with each other while the printing couple is in contact.
By these means, viz: the contact of the bears, I have at the time cach printing
couple is at work a double engagement between the two cylinders; the positive
engagement of the gear wheels and the frictional engagement of the bearers, and
a certainty and precision of movement is thus secured which would be with
difficulty attained by either device alone.
The carriers F pass around the cyliders C and around an auxiliary roll E¹
supported on a shaft E. The length of the carriers is such as to enable it to support
a series of grippers one more in number than the impression surfaces supported on
the shaft C, the grippers being of course spaced with respect to each other just as
are the impression surfaces and the result being that in each complete revolution
of the carrier each gripper is presented to a different impression surface and made
to register with it. The grippers register with the impression surfaces at their
front ends; the jaw F3 holding the paper corresponding with the front lower edge
of the impression surface so that the paper will lie close against such impression
surface from the point where it leaves the gripper to the rear end of the impression
surface. H indicates the feed board by which the sheets of paper are fed to the
grippers, I indicating a mechanism by which the grippers are caused to open and
close at proper times. This mechanism is given motion by means of a cam J
secured on the shaft C and is not shown in detail as it forms no part of my present
invention. indicates the receiving board by which the printed sheets are de-
posited and M conventionally indicates the inking rollers by which the type
forms are inked.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is
1. The combination of two printing cylinders, one carrying a series of flat type
forms and the other carrying a series of corresponding curved impression surfaces
adapted as the cylinders revolve to roll over the type, gearing secured to and con-
necting the two cylinders so that one will drive the other and each will make an
equal number of complete revolutions in the same time, said gearing corresponding
in its pitch lines with the types and impression surfaces, cylindrical surfaces CC
carried by the impression cylinder, a carrier extending around and driven by the
cylindrical surfaces of the impression cylinder and a series of grippers one
more in number than the number of impression surfaces secured to said carrier and
adapted to register in turn with the forward ends of the said several impression
surfaces.
..r
2. The combination of two printing cylinders, one carrying a series of flat type-
forms and the other carrying a series of corresponding curved impression surfaces
adapted as the cylinders revolve to roll over the type, gearing secured to and con-
necting the two cylinders so that one will drive the other and each will make
an equal number of complete revolutions in the same time, said gearing correspond-
ing in its pitch lines with the type and impression surfaces, cylindrical sur-
faces CC carried by the impression cylinder, a flexible carrier extending around
and driven by the cylindrical surfaces C of the impression cylinder and a series
of grippe¨s, one more in number than the number of impression surfaces secured
to said carrier and adapted to register in turn with the forward ends of the said
several impression surfaces.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.