Improvements in Lithographic Printing.
Year: 1889

page_text: Date of Application, 15th June, 1889
Complete Specification Left, 11th Mar., 1890-Accepted, 26th Apr.. 1890
PROVISIONAL SPECIFICATION.
Improvements in Lithographic Printing.
FREDERICK BLACKWELL of The Market Place, Reading, Berkshire, Stationer and
FRANK GAINSFORD BLACKLOCK of Hale Cottage, Croxted Road, Dulwich, Surrey,
printer & stationer do hereby declare the nature of this invention to be as
follows:-
The design to be printed may be either written or drawn on the cylindrical
printing surface, or may be transferred thereto from a transfer impression obtained
from a copper, steel, or zinc plate, or type, wood, or other engraving or writing
or drawing in transfer ink or by photography as in the preparation of an ordinary
flat lithographic stone.
The printing surface consists of a cylinder composed of stone with a polished or
grained surface or of wood or metal covered with a material having a surface so
prepared as to receive the design and transmit it under pressure or by scraping, as in
ordinary flat stone printing, to the material to be printed upon, which material passes
between the revolving printing cylinder and a scraper or impression cylinder.
The revolving printing cylinder receives the ink or colour in which the design is
to be printed from rollers revolving on their own axis in contact with the printing
cylinder, and. their supply of ink or colour is derived from and maintained and
regulated by an ink duct or ducts.
The printing cylinder is also in contact with damp rollers which by damping its
surface prevent the ink from adhering to any part thereof on which there is no
design as in ordinary lithographic printing.
The material to be printed upon may be either paper, wood, metal, linen, cotton,
or woollen fabric or other material and may be either in seperate sheets or pieces or
in a continuous roll or webb.
Dated this Fourteenth day of June 1889.
FREDERICK BLACKWELL.
FRANK GAINSFORD BLACKLOCK.
COMPLETE SPECIFICATION.
Improvements in Lithographic Printing.
FREDERICK BLACKWELL of the Market Place, Reading, Berkshire, stationer, and
FRANK GAINSFORD BLACKLOCK of Fairview, Herbert Road, The Hyde, Middlesex
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 design to be printed may be either written or drawn on a cylindrical printing
surface or may be transferred thereto from a transfer impression obtained from a
copper, steel, or zinc plate or type, wood, or other engraving or writing or drawing in
transfer ink or by photography as in the preparation of an ordinary. flat lithographic
stone. The printing surface consists of a cylinder (A) composed of stone with a
polished or grained surface, or of wood or metal covered with a material so prepared
as to receive the design and transmit it under pressure or by scraping as in ordinary
flat stone printing to the material to be printed upon, which material passes between
the revolving printing cylinder (A) and the impression cylinder or scraper (B). The
revolving printing cylinder receives the ink or colour in which the design is to be
printed from rollers (C) revolving on their own axes in contact with the printing
cylinder, and their supply of ink or colour is derived from and maintained and
[Price 6d.]

page_text: regulated by a distributing drum (D) and vibrator roller and ink duct or ducts as in
ordinary printing machines. The printing cylinder is also in contact with damp
rollers (E) which by damping its surface prevent the ink from adhering to any
part thereof on which there is no design; as in ordinary lithographic printing; these
damp rollers obtaining their supply of moisture from a distributing drum (F) vibrator,
and water duct or trough. The material to be printed upon may be either paper,
wood, metal, linen, cotton, or woollen fabric, or other material and may be either in
separate sheets or pieces or in a continuous roll or web.
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:
1. An entirely new method of lithographic printing.
2. The use of a cylindrical printing surface in lithography, instead of a flat stone
as heretofore commonly practised & used:
3. The application of a continuous rotary motion or an intermittent stopping motion
to the printing cylinder.
Dated this Eleventh dow of Mär 1000
FREDERICK BLACKWELL,
FRANK GAINSFORD BLACKLOCK.