Improvements in Printing Machinery and Process in connection therewith.
Year: 1893

page_text: Date of Application, 18th Sept., 1893-Accepted, 21st Oct., 1893
COMI LEID DIECIFICATION.
Improvements in Printing Machinery and Process in connection
therewith.
I, SAMUEL LYNDHURST PARKER of Belford Street, St. Kilda, in the Colony
of Victoria, Australia Metallic Printer 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 has reference to printing and consists of an improved process and
mechanism of and for obtaining lithographic, and other, prints on unyielding
substances, such as sheets of metal, glass, stone slabs or plates of wood and consists
in the employment of a sheet of india-rubber (or analogous elastic material) for the
purpose of taking the imprint from the stone, electro or print dye and then
transferring the moist print received by such india-rubber (or similar substance) on
to the unyielding material, such as a metal plate on which it is desired to print.
Great difficulty is experienced at the present time in this class of printing, owing
principally to the fact that where dints or small deflections &c. occur on the face
of such substances sufficient pressure cannot be applied to bring the deflected part
into contact with the inked design without jeopardising, fracturing or defacing the
design or stone by undue wear and tear from a hard unyielding substance.
In my invention I attach a sheet or plate of india-rubber on to the pressure
cylinder or roller in such a manner that when the cylinder rolls on the face of the
inked lithograph stone, type or dye, the india-rubber sheet takes up, and becomes
printed reversely with the ink from the design on the said lithograph stone, type or
dye during a portion of its revolution and in continuing its revolution it (the moist
printed rubber sheet) comes into intimate contact with the plate of metal or other
unyielding material and by reason of a second adjustable pressure roller similarly
coated the elasticity of the rubber of which is pressed close on the face of the
metal plate (or other object to be printed on) and transfers its moist inky design on
to such metal plate (or other stiff substance).
I will now refer to the drawing in which
Figure 1-shews a view of part of a printing machine.
Figure 2-a partial section of the rubber coated cylinders.
દ
"A" represents the main pressure cylinder, "B" the usual frame of machine
supporting the hood and in which a bearing is formed for the shaft of said cylinder
which is coated with a sheet or plate of india-rubber (or analogous elastic material)
"A" so that as said cylinder rolls on the face of the inked lithograph stone "D"
the india-rubber takes up the ink from the design and becomes printed reversely.
The pressure of this cylinder against the stone or type as the case may be is
regulated by the usual adjustable spring "E." A second cylinder "F" coated as
before with an india-rubber covering "F" is placed in such a position and manner
as to "back up" the plate or material to be printed upon and is provided with an
adjustable spring "G" for regulating its pressure against the material whilst the
latter is receiving the imprint from the main cylinder. "H" is a hinged feed board
which is arranged to rise and fall so as to guide the metal plate (or material to be
printed upon) into contact with the rollers. This board may be operated in the
following manner.
A vertical rod "J" is connected at its upper end to the feed board and at its
lower end by an elbow "J" to a horizontal cross shaft "J" This shaft is
connected by a crank "J" to a longitudinal rod "J" which terminates in a
roller "J" the said roller being arranged to revolve on the periphery of a cam.
This cam is so formed that as said roller revolves it is drawn nearer to or
pushed from the cams centre. For instance when the machine has reached the

page_text: position shewn on the drawing, the cam "K" ou its further revolution will force
the roller "J" on to the small projection "K" on the cam and as said roller
and rod "J" are kept in a horizontal position the rod "J" will be forced
back and so turn the shaft "J2" so as to raise the feed board to its full height
for the insertion of the metal plate or material to be printed upon. "P" represents
the grippers which may be operated in any ordinary manner, but in the drawing
I have shewn the following means. A vertical rod "L" is operated in a similar
manner to the rod "J." This rod "L" on rising to its full height comes in
contact with an arm "P" secured to the shaft "p" carrying the grippers so
that on said rod "L" meeting "P" same is raised and the shaft "P2" thus
partially revolved causing the grippers to open for the insertion of the material
to be printed upon. The grip is released from the material on the partial
revolution of the cylinder by "P" coming into contact with a plate "M."
"R" represents the strips of tin or similar material to be printed upon "S"
being the ordinary inking slab and "T" the inked rollers which need not be herein
described.
The modus operandi of my invention is as follows.
5+
Reciprocal motion is applied to the carriage of the machine carrying the litho
stone or print as the case may be whilst gear on said carriage operates main
cylinder as in ordinary printing machines. The material to be printed upon is
placed on the feed board H(being limited in position by the gauges "H")
and is gradually led into contact with the cylinders by the action of the feed
board Has previously described and at the same time is seized and beld
by the grippers "P" and held in this position. The smaller cylinder "F" is
brought into gear by the outer teeth "" of the cogged wheel "O" and the
plate to be printed upon is thus passed between the cylinders and released from
the grippers in the manner described to be removed by an operator to the hood of
the machine for drying or to wherever desired.
a
Where a roller machine press is not obtainable the process may be used by
employing a stout sheet of india-rubber, with a prepared face, and the face pressed
on to the inked lithographic design or dye, thence removing the rubber and laying
it face downward upon the inflexible article to be printed upon, and applying
squeezing pressure to the top of the said india-rubber plate, when, on removing the
rubber plate it will be found that the imprint has been communicated to the face of
the sheet, of metal or other inflexible object on which it is desired to print the
design.
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 printing machinery and process in connection therewith.-
The process of printing on unyielding substances, such as sheets of metal glass
or like material by the medium of a sheet of india-rubber (or analogous elastic
material) which takes up the inked design from a stone, type or dye and transfers
same on to the desired material under pressure substantially as described.
2. In printing machinery and processes in connection therewith-
The process of, printing on tin, glass or like unyielding material, which tonsists
in coating a cylinder with india-rubber (or analogous elastic material) to receive an
imprint from an inked design and transferring said print on to the material by
means of pressure on said material from a second cylinder coated with élastic
material.
3. In. printing machinery-
The combination of a cylinder as "A" having a coating of india-rubber (or
analogous elastic material) and an adjustable spring to regulate the pressure when
taking up the.inked design with a second cylinder.similarly coated and having an
adjustable spring to regulate its pressure against the material whilst the latter 5
receives the imprint. from the first roller substantially as 'described.

page_text: printing macntu
The combination of the whole of the parts illustrated on the accompanying
drawings constituting a printing press for printing designs ou unyielding substances
in the manner hereinbefore set forth.
יונים
1000
S. L. PARKER.