IMPROVEMENTS IN LITHOGRAPHIC CYLINDER PRINTING MACHINES
Year: 1880

page_text: LETTERS PATENT to Thomas Walter Woodhouse, of Red Lion Square, in the
County of Middlesex, for an Invention of "IMPROVEMENTS IN LITHOGRAPHIC
CYLINDER PRINTING MACHINES."
PROVISIONAL SPECIFICATION left by the said Thomas Walter Woodhouse
at the Office of the Commissioners of Patents on the 2nd November 1880.
THOMAS WALTER Woodhouse, of Red Lion Square, in the County of Middlesex.
"IMPROVEMENTS IN LITHOGRAPHIC CYLINDER PRINTING MACHINES."
The Invention relates, first, to a new arrangement of gripper and gripper fingers,
whereby greater accuracy of register is effected, the creasing of paper avoided, and
the edges of printed sheets preserved from gripper marks. The said arrangement
may be fixed to any cylinder printing machine, and consists in having the fingers
unmovable and fixed to the printing surface of the cylinder, or fixed by any other
means at the end of said printing surface instead of being attached to the gripper
as heretofore. The gripper blade is provided with holes or apertures to suit the
fixed stationery fingers.
This Invention consists, secondly, in a new arrangement for damping the stone
in lithographic printing, whereby greater regularity of damping is effected and the
damping rollers and stone are cleansed; for this purpose I place one or more per-
forated zinc or other metallic coverings upon or in place of the ordinary damping
board; the metallic covering have a chemical or galvanic affinity for grease and
dirt from ink, and will consequently take up almost every particle which would
otherwise adhere to the damping rollers and thereby keeps the work clean, whilst
the perforations may be so arranged as to regulate the damping power to the
greatest possible nicety. This Invention consists, thirdly, in new arrangements
in construction and frame work of lithographic machines, chiefly to machines of
smaller size. I combine to each side frame (in one casting) the long rail (commonly
called the runner rail) and one half of what is generally known as the ".
frames." By this arrangement I claim greater accuracy and firmness of construction.
cross

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Walter Woodhouse in the Great Seal Patent Office on the
2nd May 1881.
THOMAS WALTER WOODHOUSE, of Red Lion Square, in the County of Middlesex.
IMPROVEMENTS IN LITHOGRAPHIC CYLINDER PRINTING MACHINES."
This Invention relates, first, to a new arrangement of gripper and gripper fingers,
whereby greater accuracy of register is effected, the creasing of paper avoided, and
the edges of printed sheets preserved from gripper marks. The said arrangement
may be fixed to any cylinder printing machine, and consists in having the fingers
immoveable and fixed to the printing surface of the cylinder, or fixed by any other
means at the end of said printing surface instead of being attached to the gripper
as heretofore. The said gripper fingers being stationary do not wear or injuriously
affect the edges of the paper, and therefore insures accuracy of register in whatever
number of printings. The gripper blade is provided with holes or apertures to suit
the fixed stationary fingers. This Invention consists, secondly, in a new arrange-
ment for damping the stone in lithographic printing, whereby greater regularity of
damping is effected and the damping rollers and stone are cleanesed; for this
purpose I place one or more perforated zinc or other metallic coverings upon or in
place of the ordinary damping board; the metallic coverings have a chemical or
galvanic affinity for grease and dirt from ink, and will consequently take up almost
every particle which would otherwise adhere to the damping rollers and thereby
keep the work clean, whilst the perforations may be so arranged as to regulate the
damping power to the greatest possible nicety. A trough or fountain with or
without self feeding revolving roller or rollers may be arranged or fixed so as to
travel along with the carriage to act as a substitute for the ordinary damping
board or to be used in conjunction with the said damping board. This Invention
consists, thirdly, in new arrangements in construction and framework of litho-
graphic machines, chiefly to machines of smaller size. I combine to each side frame
(in one casting) the long rail, commonly called the "runner rail," and one half of
what is generally known as the "cross frames," by this arrangement I claim greater
accuracy and firmness of construction.
Having now described the nature of my said Invention, I would observe in
conclusion that what I consider to be novel and original, and therefore claim as
my Invention and desire to secure by the hereinbefore in part recited Letters
Patent is,―
1st. The use of fixed register fingers fastened to the printing surface of the
cylinder instead of being attached or connected with the moving gripper as
heretofore, substantially as and for the purposes described.
2nd. The use of perforated zine or other metallic coverings placed upon or used in
place of the ordinary damping board (with the object of cleaning and more effectually
regulating the damping of rollers), whether said coverings be used in conjunction
with or without a trough or fountain fitted with revolving roller or rollers, the
said trough or fountain being arranged to travel with the carriage, substantially as
and for the purposes set forth.
3rd. The improvements in the arrangement and construction of the framework
of lithographic machines, which consists in combining in one casting the side frame
with the long rail (commonly called the "runner rail") and one half of what is

page_text: generally known as the "cross frames," substantially as and for the purposes set
forth.
In witness whereof, I, the said Thomas Walter Woodhouse, have hereunto set
my hand and seal, this Thirtieth day of April, in the year of our Lord
1881
Signed, sealed, and delivered by
the aforesaid Thomas Walter
Woodhouse in the presence of
PHILIP M. JUSTICE,
14, Southampton Bdgs.,
Chancery Lane,
London,
Patent Agent.
THOMAS W. WOODHOUSE. (LS.)