An Improvement relating to Printing Machines.
Year: 1891

page_text: Date of Application, 25th Apr., 1891
Complete Specification Left, 25th Jan,, 1892-Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
An Improvement relating to Printing Machines.
I, MOSES YOUNG of No. 178 Main Street, Anderston Glasgow North Britain
Printer do hereby declare the nature of this invention to be as follows:-
This invention relates to printing machines and has for its object to keep the
sheet of paper &c. which is held in the "gripper" of the machine during the process
of printing, close up to the face of the cylinder and prevent it from bagging or
dipping into the more open parts of typework contained in the "formes."
In carrying out my said invention I construct a bar, of any suitable material,
about the length of the cylinder, and fix it in a stationary position upon the
machine where it has close contact with the printing surface upon the cylinder and
is in near proximity to the "impression" (types, blocks or stereos) so that during
the process of printing, when the sheet is caught by the gripper and carried round
by the cylinder it passes over the said bar before coming in contact with the types,
thereby preventing the sheet from falling, loosely, upon the face of the "forme."
Dated this 24th day of April 1891.
JOSEPH
LOCKWOOD,
263, Argyle Street, Glasgow, Agent for the Inventor.
COMPLETE SPECIFICATION.
An Improvement relating to Printing Machines.
I, MOSES YOUNG of No. 178 Main Street, Anderston Glasgow North Britain
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 relates to printing machines, and has for its object to keep
the sheet of paper, etcetera, which is held in the "gripper" of the machine during
the process of printing, close up to the face of the cylinder and prevent it from
bagging or dipping into the more open parts of typework contained in the
"formes."
In carrying out my said invention I construct a bar of any suitable material,
about the length of the printing machine cylinder, and fit it upon the machine in
a stationary position where it has close contact with the printing surface upon the
cylinder and is also in near proximity to the "impression" (types, blocks or
stereos) so that during the process of printing, when the sheet is caught by the
gripper" and carried round with the cylinder, it passes over the said bar before
coming in contact with the type, thereby preventing the sheet from falling, loosely,
upon the face of the "forme.
In order that my invention may be thoroughly understood and readily carried
into effect I have prepared the accompanying drawings, in which :-
Figure 1, is a view, partly in section, shewing the relative position of my
improvement to the side frame, carriage bed, and cylinder of an ordinary letter
press printing machine.
Figure 2, is a plan of parts shewn in Fig. 1.
Figure 3, is a view in section shewing the relative position of my improvement to
the side frame, cylinder, and other parts of an ordinary letter press printing
machine.
Figure 4, is a perspective view of my improvement (as shewn in Fig. 2) detached
from the machine.

page_text: Similar letters of reference, and numerals, are employed throughout the ulus-
trations to indicate corresponding parts.
In Figures 1, 2, and 3, the parts marked are the following; -A represents the
cylinder, B, the side frame, C, the gauge bar, and D the bed or carriage of an
ordinary letter press printing machine. I prefer to shew only those portions of the
machine which are essential to make my invention clear.
The bar, which constitutes the chief agent in my invention when applied as
before named to the cylinder of a letter press printing machine, (marked E in
Figure 4) is supported in close proximity to the cylinder, from some part, or parts
of the fixed or stationary members composing the machine, by means of arms or
brackets such as e', e², e³, or their equivalents. The eyes, which are marked e
enable the said brackets of the bar E to be threaded upon the gauge bar C,
Figures 2 and 3, whilst the end rods, e, Figs. 1, 2 and 4 are united to the side
frame B as shewn in Figs. 1 and 2, or in any other simple manner.
The bar E is sometimes supported from other parts of the machine, adjacent to
the cylinder and not always from that portion of the side frame indicated in these
illustrations, for whilst it is sometimes an advantage to connect the bar E with the
gauge bar C, by threading one upon the other as shewn here, this is not essential,
the arms e, e, e, can be made so that they only rest upon the top of the bar C-
and need not encircle it ;-the bar E may also be supported at each extremity only,
without any intermediate support whatever according as the size of the machine
and other varying circumstances render necessary or desirable: it is thus shewn in
Figure 1.
"
When the bar E is fixed in its proper position as shewn in Figures 1, 2 and 3, it
is in close contact with the outer surface of the cylinder and a very little distance
above the surface of the "impression," F, composed of types, blocks, stereos
etcetera. As the "gripper," a¹ receives the sheet G, Fig. 3 for printing, and the
cylinder is revolved, the bar E keeps the sheet pressed close up to the face of the
cylinder, thereby preventing it falling loosely upon the "impression
or in
the open parts of the "forme," or becoming baggy by means of air getting confined
between it and the cylinder. The result is that the sheet, thus closely held by the
said bar against the printing surface of the cylinder (as the latter revolves) is
prevented from acquiring fulness in any part and consequently becoming creased
during the process of printing.
"
The restraining operation which is performed by the said bar E, as shewn and
described, may be effected by a bar consisting of one or more wire rods a piece of
thin metal a hollow tube etcetera ;-but, as my object is to keep the printing sheet
under complete control throughout the printing process, and to keep pressed
closely to the face of the cylinder until it is, all but, in contact with the "impression
before letting it go free, I find that a very thin bar of wedge shaped section, placed
horizontally above the types and almost close upon them, is the best for my
purpose. The bar, thus shaped and situated does not interfere with the opening
and closing of the "grippers or with any of the other working parts of the
machine whilst the printing surface, or sheet, is in contact with the "impression
almost as soon as it leaves the control of the bar, there is no possibility of slackness
in the sheet.
"
"
I am aware that, previous to my invention, sundry attempts have been made
with appliances for anti-creasing purposes in connection with letter press printing
machines, but different in essential respects from my invention; it will therefore
be understood that I do not claim such an appliance, broadly as my invention.
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;-
First. In a letter press printing machine, the combination therewith of the bar E,
all substantially as herein described and shewn, or any mere modification thereof,
for the purposes specified.

page_text: Second. In a letter press printing machine, the combination therewith of the
bar E, fixed to and supported by the frame and gauge bar of the machine, all
substantially as herein described and shewn, or any mere modification thereof, for
the purposes specified.
Third. In a letter press printing machine, the combination therewith of the
bar E, fixed to and supported by any convenient part of the machine, all sub-
stantially as herein described and shewn or any mere modification thereof, for the
purposes specified.
Dated this 23rd day of January 1892.
JOSEPH LOCKWOOD,
263, Argyle Street, Glasgow, Agent for the Inventor.