Improvements in or connected with Perfecting Printing Machines.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Perfecting Printing Machines.
I, JOHN KELLEY of the Firm of John Kelley and Company, Albion Works,
Otley, near Leeds, in the County of York, Printers' Engineers, do hereby declare
the nature of this invention to be as follows:-
The object of my invention is to so improve the construction of perfecting
printing machines, that the making ready process is greatly facilitated, the grippers
for conducting the sheets through the machine are reduced to the least possible
number, and the mechanism is of greater durability and accuracy, and may be
worked at a higher speed, than in machines hitherto employed.
According to my invention I employ two continuously rotating cylinders, the
circumference of one cylinder being double the circumference of the other. The
feeding board is arranged low down on the machine, so as to expose most of
the surface of the large cylinder during the making ready process; and the taking-
off mechanism, which is preferably situated above the small cylinder, may be
mounted on adjustable arms having balance weights to facilitate its withdrawal
from the small cylinder, when it is desired to expose the surface of same for
making ready.
Two travelling tables are employed, one in front of the other, each for the
purpose of carrying a separate form of type; and each of these tables is provided
with a separate parallel cam motion, operated by upright spindles driven in
conjunction through suitable gearing from the main shaft of the machine.
By employing two separately driven tables, I am enabled to adjust one table to
reverse at the end of its travel after the other, so as to cause the type forms to
meet the printing portions of the surfaces of the cylinders at the proper time.
Machines constructed as above described enable both sides of the sheet to be
printed during two consecutive movements of the tables, thus necessitating only one
change of grippers between the two impressions and minimising the risk of fault
in the register of the sheet, whilst at the same time register or detaining drums
are dispensed with..
Although I have described my invention with reference to a machine having two
cylinders of different size, yet the combination of the duplicate tables, cam motions,
and spindles may be employed in machines having two equal sized oylinders,
without departing from the nature of my said invention.
•
1
1000

page_text: Improvements in or connected with Perfecting Printing Machines..
I, JOHN KELLEY, of the Firm of John Kelley and Company, Albion Works,
Otley, near Leeds, in the County of York, 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:―
The object of my invention is to so improve the construction of perfecting
printing machines, that the making ready process is greatly facilitated; the grippers
for conducting the sheets through the machine are reduced to the least possible
number; and the mechanism is of greater durability and accuracy, and may be
worked at a higher speed, than in machines hitherto employed. In order that my
invention may be clearly understood I will proceed to describe same with reference
to the accompanying drawings in which similar letters refer to like parts in all the
figures.
Fig. 1 is a side elevation of as much of a machine as is required to illustrate my
invention showing the parts in position ready for printing; and Fig. 2, is a similar
view of the same machine with the cylinders clear for making ready. Fig. 3, is a
detail view.
The
According to my invention I employ two continuously rotating cylinders, A and B,
the circumference of the cylinder A being double the circumference of the cylinder B.
C is the feeding board which is arranged low down on the machine, so as to expose
most of the surface of the large cylinder A. during the making ready process; and
the taking off mechanism D, is mounted in a frame E pivotted at F, and a suitable
arm G and weight H are provided for the purpose of balancing the said frame E,
this enabling the taking off mechanism to be raised clear of the cylinder B into
the position shown at Fig. 2, when it is required to expose the surface of same for
making ready. J, and K, are two travelling tables, each of which carries a separate
form of type; and the said tables J and K, are provided with separate cam
motions Land, M which are operated by upright spindles N and P.
spindles N and P are driven at a uniform speed through the bevel gearing R from
the main shaft S. of the machine, and the said spindles N and P are set in such a
position that their spur wheels gear with the cam motions Land M so as to cause the
table K to reverse its motion after the table J has commenced its return movement.
Tis the delivery board which is fulcrummed at V, thus enabling the said board to
be lifted back into the position shown at Fig. 2 when it is required to make ready
When the making ready process is completed, the taking off mechanism D is
lowered into the position shown at Fig. 1 and the delivery mechanism T is also
lowered. The sheet is placed on the feed board C from which it is removed by the
gripper on the cylinder A, and as the said cylinder rotates the sheet is brought
juto contact with the type form on the table J thus printing one side of the sheet.
The cylinder B during this movement has been lifted by the ordinary liſting
mechanism thus preventing its impression surface from coming in contact with the
type, and on the table J reaching the end of its travel, the table K continues for a
short distance thus, detaining it for a short time and causing it to begin its return
travel a certain distance behind the table J. The sheet as it travels round on the
cylinder A is caught by the gripper on the cylinder B and on the impression
surface of the cylinder B coming to the under position, the opposite side of the
sheet comes in contact with the surface of the form of type on the table K, the
latter having been detained, as above described, so as to time in with the rotation
of the cylinder B. On the gripper on the cylinder coming adjacent to the taking
off mechanism D, the latter removes the sheet and the flyer deposits the printed
sheet on the delivery board T.
Machines constructed as above described enable both sides of the sheet to be

page_text: printed during two consecutive movements of the tables, thus necessitating only
one change of the grippers between the two impressions and minimising the risk of
fault in the register of the sheet, whilst at the same time register or detaining
drums are dispensed with.
•
Although I have described my invention with reference to a machine having two
cylinders of different size, yet the combination of the duplicate tables, cam motions,
and spindles, may be employed in machines having two equal sized cylinders,.
without departing from the nature of my invention.
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:-
1. In a perfecting printing machine, the employment of two separately driven
tables so arranged that they may be driven at different distances apart during
their forward and backward travels, substantially as and for the purposes set forth.
2. The two cylinders A and B one being double the circumference of the other,.
working in combination with the tables J and K driven separately, substantially
as described.
3. The cylinders A and B, tables J and K, cam motions L and M, spindles N.
and P, gearing R, and main shaft S, substantially as and for the purposes set
forth.
4. The general arrangement, construction and combination of the various parts.
forming my invention for improvements in or connected with perfecting printing.
machines, substantially as and for the purposes set forth.
Dated this 18th day of December 1895.
BREWER & SON,
London and Leeds, Agents for the Applicant.
BREWER & SON,
London and Leeds, Agents for the Applicant.