Improvements relating to Flat-bed Perfecting Printing Machines.
Year: 1892

page_text: Date of Application, 8th July, 1892
Complete Specification Left. 8th Apr., 1893-Accepted, 13th May, 1893
PROVISIONAL SPECIFICATION.
Improvements relating to Flat-bed Perfecting Printing Machines.
We, WILLIAM SILVER FOORD, WILLIAM WATSON FOORD and JOHN KILBY
FOORD, all of Kinaston Works, Oakley Street, Lambeth, in the County of Surrey,
Engineers and Printing Machine Manufacturers, do hereby declare the nature of
this invention to be as follows :-
This invention relates to feeding apparatus for flat bed perfecting printing-
machines, and has for its chief object to provide two or more feeding devices with
their respective feeding boards arranged to feed to the first impression cylinder of
the machine whereby increased speed can be obtained. With two feeding points
arranged according to our invention, the machine can be run at approximately
twice the speed of a single feed machine, and thus double the amount of work can
be performed.
One convenient mode of carrying our invention into effect is as follows: that is
to say, above the ordinary gripper feed cylinder and feed board is provided another
gripper cylinder and feed board around which are passed endless tapes so arranged
that they in conjunction with the return tapes from the impression cylinders
convey the sheets that are fed to the upper feed cylinder and deliver them to the
tapes of the lower feed cylinder, whereupon the said sheets are seized by the said
tapes of the lower feeding device and are carried around the impression cylinders
and through the machine. The two gripper feed cylinders are driven at the same
surface speed as each other and are so timed as to feed the sheets alternately to the
impression cylinders. The position of the supplementary feeding device is not
material so long as it is arranged to work as above explained.
Instead of employing a second gripper feed cylinder, we sometimes arrange to
feed directly to the first impression cylinder, in addition to feeding to the ordinary
gripper feed cylinder. The impression cylinder in that case is provided with
grippers to seize hold of the sheets.
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements relating to Flat-bed Perfecting Printing Machines.
We, WILLIAM SILVER FOORD, WILLIAM WATSON FOORD and JOHN KILBY
FOORD all of Kinaston Works, Oakley Street, Lambeth, in the County of Surrey,
Engineers and Printing Machine Manufacturers, 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 feeding-apparatus for flat-bed perfecting printing
machines, and has for its chief object to provide two or more feeding-devices with
their respective laying-on boards arranged to feed to the first impression-cylinder
of the machine, whereby increased speed can be obtained. It is well known that
the speed of such machines which have but one feeding device is limited by the
rate at which the work can be fed thereto. Now with two feeding-devices arranged
according to our invention, the work can be fed twice as quickly as with one feeding
device and hence the machine can be run at approximately twice the speed of a
single-feed machine, and thus nearly double the amount of work can be performed.
One convenient mode of carrying our invention into effect is as follows, that is to
say, above the ordinary gripper feed-drum and laying-on board is provided another

page_text: gripper feed-drum and laying-on board around which drum are passed endless tapes
so arranged that they in conjunction with the return tapes from the impression-
cylinders receive the sheets that are fed to the upper feed-drum and convey them
towards the lower feed-drum, whereupon the said sheets are seized by the tapes of
the lower feed-drum and are carried around the impressión-cylinder and through
the machine. The sheets fed to the ordinary feed-drum are passed to the
impression-cylinder as heretofore.
In the accompanying drawing we have shown in side elevation a flat-bed perfecting
printing machine having two feeding apparatuses, so much of the machine only
being shown as is necessary to understand our invention.
A is the framework which carries the reciprocating flat type-bed; B B' are the
impression-cylinders; C is the ordinary feed-drum, and C₁ the laying-on board for
same; D is the additional feed-drum, and D¹ the corresponding laying-on board,
constructed and arranged according to our present invention.
The drum D is supported by suitable brackets E carried by the frame of the
machine. It is provided with ordinary grippers F for seizing the sheets fed
thereto, and with cam-mechanism for controlling the grippers to open and close
the same at the proper moment. This mechanism is similar in construction and
operation to that applied to the ordinary gripper feed-drum C and hence it is not
illustrated. The drums C and D are geared directly with the first impression-
cylinder B and are driven at the same surface speed.
The laying-on board D₁ is provided with a hinged part d' which is controlled
through a lever or arm d2 by a cam in a well known manner. The hinged part d'
is by this mechanism dropped at the right moment to allow the sheet to be seized
by the grippers. The said drum D is shown double the diameter of the drum C,
but this proportion is not essential. The feeding times of the drum C are arranged
to be intermediate of those of the drum D.
Three, sets of tapes are provided viz. :-the two ordinary sets G, H which pass
around the impression-cylinders, one of which sets G returns over guides placed
above the cylinders, and the other of which H returns around the feed-drum C,
and a third set I which passes around the feed-drum D and guide rollers or
rods g, g placed in close proximity to the feed-drum C. The tapes G also pass
around one of the guide rods or rollers and are thereby maintained in close
contact with the tapes I so that the sheets fed to the drum D when released from
the grippers F pass between the tapes G, I and are thereby conducted to the feed-
drum and between the tapes G, H whereupon they are passed around the
impression-cylinders in the usual manner. The sheets fed to the drums C are
passed direct to the impression-cylinder as heretofore.
Instead of employing a second gripper feed-drum we sometimes arrange to feed
directly to the first impression-cylinder, in addition to feeding to the ordinary
gripper feed-drum. The impression-cylinder in that case is provided with suitable
grippers and operating mechanism therefor to seize the sheets as they are delivered
thereto.
Although we have shown ordinary feed-drums C, D for feeding the sheets, it is
obvious that we may provide two or more feeding devices of other types.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :
A flat-bed perfecting printing machine provided with two or more feeding
apparatuses each with an appropriate laying-on board, mechanism for controlling
the said boards and the grippers of the feeding apparatuses, and tapes for guiding the
sheets, substantially as, and for the purpose, specified.
Dated him oth 1A
1 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.