IMPROVEMENTS IN PRINTING MACHINES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, WILLIAM SENIOR HOPE of 36 Marshall St, St Georges Road Southwark in
the County of Surrey, Engineer do hereby declare the nature of my invention
for IMPROVEMENTS IN PRINTING MACHINES to be as follows:-
Introducing a Gripper bar into the Wood Feeding drum, of Drop bar or Web
Printing Machines, and working the Gripper Motion by means of a Cam of such
a shape as to allow the Grippers to take the sheet at the proper time and hold it
till it enters the tapes of the Machine then to open the grippers and leave the sheet,
At this time a moveable piece which is fitted in a slide is made to decend and fill
up the space in the cam making it into a circle, arround which the pulley on the
end of gripper bar lever revolves till the proper time to take the next sheet The
moveable piece is worked by a lever and cam driven from a convenient part of the
Machine.
Secondly. Delivery of the printed sheet outside the Cylinders by means of a
roller mounted in a moveable bearing on the top of the outer cylinder The position
of this roller is determined by a cam which revolves once to each sheet printed
and the roller forms the tapes into a triangle directing the sheet first to the
cylinder to be printed on the second side and then to a set of tapes leading to the
flyer to be delivered.
Thirdly, To make the machine print a larger sheet than it was originally designed
to do, and giving a longer travel to the tables so that the forme is rolled and inked
in a more perfect manner.
This is effected by means of bevil wheels and not mitres as beretofore so that
the upright spindle of the Machine may make a greater number of revolutions than
the driving shaft thereby saving a portion of the motion lost in the rack when
changing from one side of the pinion to the other..

page_text: WILLIAM SENIOR HOPE 36 Marshall Street St: Georges Road Southwark in
the County of Surrey do hereby declare the nature of my invention for
IMPROVEMENTS IN PRINTING MACHINES and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement
First. By introducing a Gripper bar into the wood feeding drum of drop bar or
web printing Machines, and working the Gripper motion by means of a cam of
such a shape as to allow the grippers to take the sheet at the proper time and hold
it till it enters the tapes of the machine, then to open the grippers and leave the
.sheet, This is performed in the following manner A movable cam B fitted in a
Slide is made to accend at the proper time for the Grippers to take the sheet and
hold it till the sheet enters into the tapes of the machine, then to decend and allow
the grippers to open, This cam is worked by a lever C and another cam D driven
from a convenient part of the machine, so that it will act at the proper time to
take the sheet, so as to meet the forme to be printed at the time required These
cams must be designed to suit the size of the machine to which they are applied.
Secondly. Delivery of the printed sheet outside the cylinder by means of a
roller A mounted in a movable bearing B on the top of the outer cylinder, The
position of this roller is determined by a cam C which revolves once to each sheet
printed, and the roller forms the tapes into a triangle D. directing the sheet first to
the Cylinder to be printed on the second side, and then to a set of tapes, leading
to the flyer to be delivered on the board or table over the ducter at the end of the
machine and not as heretofore between the cylinders (note) see former patent,
A.D. 1882, No 4176.
+
Thirdly. To make the machine print a larger sheet than it was originally
designed to do, and giving a longer travel to the tables so that the forme is rolled
and inked in a more perfect manner, This is effected by means of Bevil wheels,
and not by Mitre wheels as heretofore so that the upright spindle of the machine
may make a greater number of revolutions than the driving shaft, thereby saving
portion of the motion lost in the rack when changing from one side of the pinion
to the other.
In order that my invention may be more fully understood, I will now proceed to
describe the same with reference to the accompanying Drawings.
Fig 1. Is a side elevation of the drum, of a Web Machine with the Grippers
open, A is a pulley on the end of the Gripper bar. B, is the cam closed and the
pulley A revolving on the outside till the proper time to take the sheet this is
determined by the cam D which revolves once to each sheet and lifts the lever C
which is connected with the cam D by means of a stud lifting the cam B, at the
proper time the pulley A then enters into the slot E, as shewn in, Fig. 2. and the
drum revolving gives the necessary motion to the grippers so that they will close
and take the sheet to be printed.
The Gripper bar is held with a spring in the usual way and the grippers can be
of the most convenient shape to suit the machine to which they are applied.

page_text: Fig 4. Is a side Elevation of the drum of a Drop bar Machine with the grippers
closeing, the cam B is raised into position by cam D. and the lever C. the drum
revolving engages the pulley A on end of gripper bar with the cam B which guides
the pulley A into the slot E then to hold it in position till the drum has made a
portion of a revolution then to decend and allow the pulley A to leave the slot E
thus closeing the grippers they being held in position by a spring in the usual way.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
First, In Drop bar or web printing machines, the introduction of a gripper bar
into the ordinary wood drum, of the machine and working the gripper bar with a
cam in a movable slide, worked by a lever and cam driven from a convenient part
of the machine.
Secondly, The means and apparatus as herein before described, for effecting the
delivery of the sheets outside the Cylinders and in the arrangement of the tapes
therefore, and specially applicable to what are known as Perfecting Machines.
Thirdly, In Perfecting, Single, or other letterpress printing machines the
employment of Bevil wheels to give the rack pinion a greater number of revolutions
than the driving pinion.
Dated this twenty second Day of January One thousand eight hundred and