IMPROVEMENTS IN DAMPING APPARATUS FOR LITHOGRAPHIC PRINTING MACHINES
Year: 1884

page_text: I GEORGE CLIFF of Croydon Works, Mill Green, Holbeck, Leeds in the
county of York Engineer do hereby declare the nature of the said invention for
"IMPROVEMENTS IN DAMPING APPARATUS FOR LITHOGRAPHIC PRINTING MACHINES"
to be as follows:-
The object of my invention is to construct a simple and efficient damping
apparatus to supersede hand damping, and to distribute the water on to the
damping board or stone more evenly and regularly.
I employ a stationary trough for water, placed at a convenient position on the
machine, in the trough is a feed roller, which is rotated by an adjustable crank-pin,
rod, and ratchet, the crank pin is adjustable in a slot in a cam, (in lieu of the crank
pin, rod, and ratchet, chain and chain wheels may be used) to regulate the amount
of rotation of the feed roller the crank pin is moved higher or lower in the slot of
the cam.
A messenger or distributing roller is carried in a pivotted bracket, and
is raised and lowered by a slide and cam, and brought into contact first with the
feed roller and then with the damping board, so distributing either a great or small
quantity of water, to suit the requirements of the printer, the cam receives its
motion from the main shaft by counter shafts and bevel wheels or by a chain
motion or other gear. Or in lieu of working the distributing roller on to the
damping boards, it may work direct on to the stone.
JOHN E. WALSH,
Crossley St., Halifax,
Agent to the Applicant.

page_text: 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 construct a simple and efficient damping
apparatus to supersede hand damping and to distribute the water on to the damping
board or stone more evenly and regularly.
DISCRIPTION OF DRAWINGS.
Fig 1 is a front elevation of my invention applied to a Lithographic printing
machine.
==
Fig 2 is a front elevation of same with distributing roller in contact with the
damping board.
I employ a stationary trough A for water, placed at a convenient position on the
machine frame B in the trough is an adjustable feed roller C which is rotated by an
adjustable crank D. Pin D¹ rod E, ratchet F and ratchet wheel G, the crank D is
adjustable in a slot H in a cam J (in lieu of the crank pin, rod and ratchet chain
and chain wheels may be used) to regulate the amount of rotation of the feed
roller C, the crank pin D is moved higher or lower in the slot H, of the cam Ja
messenger or distributing roller K is carried in a pivotted bracket L and is raised
and lowered by a slide rod M and cam J and brought into contact first with the
feed roller C, and then with the damping board N so distributing either a great or
small quantity of water to suit the requirements of the printer; the cam receives
its motion from the main shaft by counter shafts and bevel wheels, or by a chain
motion or other gear, or in lieu of the distributing roller working on to the damping
board it may work direct on to the stone.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed I declare that what
I claim is
The use and employment of a distributing roller, which alternately comes in
contact with the feed roller (working in a supply trough) and damping board or
stone as and for the purposes shown and described.
The arrangement of trough and feed roller, operated so as to regulate and control
the supply of liquids to the damping board or stone as shown and described.
1.เง L Load Cal
f Naomba 1001
JOHN E. WALSH,
Crossley Street, Halifax,
Agent for the Applicant.