IMPROVEMENTS IN PRINTING MACHINERY
Year: 1870

page_text: LETTERS PATENT to David Payne, of Otley, in the County of York,
Machine Maker, for the Invention of "IMPROVEMENTS IN PRINTING
MACHINERY."
Sealed the 3rd March 1871, and dated the 6th September 1870.
PROVISIONAL SPECIFICATION left by the said David Payne at the
Office of the Commissioners of Patents, with his Petition, on the
6th September 1870.
I, DAVID PAYNE, of Otley, in the County of York, Machine Maker,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN PRINTING MACHINERY," to be as follows:-
This Invention relates to that class of printing machinery wherein a
reciprocatory table or carriage is employed to carry the printing surface,
whether it be type, stereotype, engraved plates, lithographic stones, or
other printing surface, and where conducting and impressing cylinder

page_text: or cylinders with rotary motion alternating in two directions is or are
employed for seizing by means of grippers the sheet of paper (or other
material to be printed) and carrying or conducting the said paper into
contact with the printing surface and for pressing the same thereon,
and also wherein endless tapes are used for conducting away the printed
paper or other material.
employed for seizing by means of grippers the sheet of paper (or other
material to be printed) and carrying or conducting the said paper into
contact with the printing surface and for pressing the same thereon,
and also wherein endless tapes are used for conducting away the printed
paper or other material.
My improvements consist,-
Firstly. As relates to such machines (when they are driven by what is
technically known_as_the "mangle_motion") in the application of a
"differential motion" or a means of varying the motion or speed (as
shewn and described in the Specification of a Patent granted to me
dated the Seventh day of September 1867, No. 2537), for driving the
said machine so as to produce a quicker movement of the table and
cylinders in the intermediate part of the stroke, and a slower motion at
the ends, thereby to accelerate the general speed of the machine without
any increase of its speed at the ends of the stroke.
Secondly. As relates to such machines when the table is driven by
ordinary crank motion, the improvements consist in the application of
the said differential motion," intermediately between the first motion
and the tape driver for regulating and adjusting the surface speed of
the delivery tapes to the surface speed of the impression cylinders and the
reciprocatory table so as to effect a proper conducting away of the printed
paper or other material from the machine as required.
Thirdly. As relates to a two-feed machine of this class, the improve-
ments consist in the employment of two impression cylinders (each having
its separate feed board) so constructed and arranged that a sheet will
be printed by each cylinder, or two sheets during the forward stroke of
the table and none during the return stroke. To effect this I make
one cylinder larger in diameter than the other in suitable proportion,
and arrange them so that while the smaller one is fed in the usual
manner the other is fed at the top, and so that while the sheet fed to
the small cylinder will be first in process of being printed the sheet
fed to the larger cylinder will be brought to the printing surface at the
proper time to be printed immediately afterwards. The sheets from
each cylinder are delivered by separate tapes, which are also regulated
in their relative speeds by the application of the "differential motion
as previously explained.
"

page_text: Fourthly. As relates to a four-feed machine of the same class or to
be fed at four different places and printed by two impression cylinders,
my improvements consist in the application of two "feed cylinders,"
one placed in or above the angle betwixt the impression cylinders, and
the other cylinder (which is to be of larger diameter) is placed imme-
diately above it. The four feed boards are arranged two of them to the
impression cylinders in the usual manner as for the two-feed machines,
and the other two boards are arranged above them, one on each side
of the aforesaid top and larger feed cylinder, which is constructed with
grippers so as to seize the sheet as presented by or from each board
alternately, and conduct the same to the intermediate or small cylinder,
which at the proper time by means of grippers seizes the sheets in
succession, and presents them to the impression cylinders, which in like
manner seize and conduct them to the printing surface..