Improvements in Lithographic and Letterpress Printing Machinery.
Year: 1889

page_text: Date of Application, 23rd Dec., 1889
Complete Specification Left 23rd Oct., 1890-Accepted, 13th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Lithographic and Letterpress Printing Machinery.
I, ADAM PATON, of 114, Beeston Road, Leeds, in the County of York, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the shortening of lithographic and letter-press printing
machines by the application of a smaller cylinder than hitherto used, onto which I feed
the sheet in a new manner; that is to say, a small cylinder could not be economically
used previously on account of having to feed the sheet on or near to the top or bottom
of the cylinder (no method being hitherto known to feed the sheet near to the centre
of the side of the cylinder) whereas by the novel application of my ordinary double
gripper to this new purpose, instead of biting the sheet on the cylinder I bite the
sheet out independent of the cylinder, the double grippers standing out almost in a
straight line from the centre of the cylinder, biting the sheet there: the result is that
I obtain a method of feeding the sheet in register near to the centre of the side of the
cylinder hitherto unattained, and I can therefore use the small cylinder economically.
As the cylinder is coming to a stop the grippers are made to stand out to a position
almost in a line from the centre of the cylinder, the grippers being apart so as to
receive the sheet or card to be printed; the top gripper then closes onto the bottom
one or the bottom gripper closes on to the top one to bite the sheet, then as the
cylinder revolves, the two grippers holding the sheet, gradually come closer to the
cylinder until they touch the cylinder near to or on the top.
The grippers are opened and shut much in the ordinary mannor or any manner with
cams or inclines or otherwise, but I prefer a segment of a wlieel, toothed, and fixed on
the end of the gripper shaft, geared into a larger segment working on the end of the
cylinder, which larger segment has a gripper-pulley on it to run on a path-bar which
is raised or lowered at the proper times by a cam or eccentric thereby opening and
shutting the grippers.
hind day of December 1889.
ADAM PATON.
COMPLETE SPECIFICATION.
Improvements in Lithographic and Letterpress Printing Machinery.
I, ADAM PATON, of 114, Beeston Road, Leeds in the County of York, Engineer,
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 relates to the shortening of lithographic and letterpress printing
machines by the application of a sinaller cylinder than hitherto used, on to which I
feed the sheet in a new manner; that is to say, a small cylinder could not be
economically used previously on account of having to feed the sheet on or near to the
top or bottom of the cylinder (no method being hitherto known to feed the sheet near
to the centre of the side of the cylinder in register) whereas by the novel application
of my ordinary double gripper to this new purpose instead of biting the sheet on the
cylinder I bite the sheet out independent of the cylinder, the double grippers standing
out almost in a straight line from the centre of the cylinder, biting the sheet there;
the result is that I obtain a method of feeding the sheet in register near to the centre
of the side of the cylinder hitherto unattained, and I can therefore use the small
cylinder economically.
As the cylinder is coming to a stop the grippers are made to stand out to a position

page_text: almost in a line from the centre of the cylinder, the grippers being apart so as to
receive the sheet or card to be printed; the top gripper then closes on to the bottom
one or the bottom gripper closes on to the top one to bite the sheet, then as the
cylinder revolves, the two grippers holding the sheet, gradually come closer to the
cylinder until they touch the cylinder near to or on the top.
The grippers are opened and shut much in the ordinary manner or any manner
with cans or inclines or otherwise, but I profer a segment of a wheel fixed on the end
of the gripper shaft, toothed, and geared into a larger segment working on the end of
the cylinder, which larger segment has a gripper-pulley on it to run on a path-bar
which is raised or lowered at the proper times by a cam or eccentric thereby opening
and shutting the grippers.
Figure 1 of the accompanying drawings shows an end view of the printing
cylinder A with my invention applied thereto; P is the gripper pulley which runs on
the path-bar Cmoving the larger segment S which being toothed moves the smaller
segment 1) keyed on the gripper shaft B which opens the double grippers G and g
from their dotted position out to their open position almost in a straight line from the
centre of the cylinder.
As the cylinder is coming home to a stop in the direction of the arrow the gripper
pulley P runs on the edge of the path-bar actuating the segments to open the
grippers.
The sheet is fed up against the registering finger then as the path-bar C rises, the
top gripper closes on to the bottom one; the registering finger fis so shaped that it
pushes the sheet back a little in the descent of the top gripper.
When the cylinder begins to revolve the two grippers holding the sheet fast,
gradually come closer to the cylinder until they are in the position as shown dotted in
Figure 1.
Figure 2 represents the cam and its attachments to raise and lower the path-bar.
Figure 3 is a plan showing the segments in their connection with the path-bar C
and the cylinder wheel K which is fixed on the cylinder shaft.
Figure 4 represents a partial section of the cylinder showing the double grippers
closed into the cylinder and showing the application of the spring E to hold the two
grippers close to one another the spring is carried on a semicircular rod which is fixed
into the tailpiece ; on the top gripper the other end of the rod passing freely through
the bottom gripper.
Figure 5 is also a partial section of the cylinder showing the bottom gripper with
its tail-piece which rests against the stop piece I while the top gripper opens from
the bottom one to allow the sheet to be fed the bottom gripper being loose on the
gripper shaft allows the top gripper which is fixed on the gripper shaft to rise by the
action of segment D.
Figure 6 is a plan of the grippers shown in the cylinder, the top grippers G are
fixed on the gripper-shaft and the bottom gripper y is loose on the shaft.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
First. The new method of feeding a sheet on to or near to the centre of the side of
a printing cylinder with a double gripper standing out of the cylinder and biting the
sheet there clear of the cylinder substantially as herein before described.
Second. The combination of the path-bar C with the segments S and D in Figure 1
and the cam in Figure 2.
Third. The application of the springs E to the double grippers to hold them together
while biting the sheet as in Figure 4, and the tail piece in Figure 5 to keep the
grippers apart while the sheet is being fed.
Dated this 92nd day of Ontah 1900