Improvements in Printing Machines.
Year: 1894

page_text: Date of Application, 22nd Mar., 1894
Complete Specification Left, 20th Aug., 1894-Accepted, 22nd Sept., 1894
Improvements in Printing Machines.
I, ROBERT FRITH SPROULE, of Kittsbury, Berkhampstead, in the County of
Hertford, Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
My invention relates to printing machines in which a cylinder, having a printing
forme on a flat part formed on its underside, ascends and descends printing on the
uppermost of a pile of envelopes or sheets, while inking rollers are caused to
revolve partly around it. In order to give the cylinder a steady true movement as
it reciprocates I provide on its axis at each end a slipper or a roller which works
in a vertical guide. For giving the inking rollers their revolving movement partly
around the cylinder, and timing that movement to suit the stroke of the cylinder! I
adopt the following arrangement.
On the frame, which carries the inking rollers and which is pivotted on the axis
of the cylinder, I fix a pinion which gears with a rack on a vibrating arm pivotted
to the back frame of the machine in such a position that when the cylinder is at
the end of its down stroke, this arm is horizontal or nearly so. As the cylinder
moves up or down near the lower end of its stroke, the rack gives very little
movement to the inking rollers, but when the cylinder moves through other parts
of its stroke, the rack gives considerable movement to the pinion and consequently
to the inking rollers.
Dated this 22nd day of March 1894
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Printing Machines.
I, ROBERT FRITH SPROULE, of Kittsbury, Berkhampstead in the County of
Hertford, Engineer, 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 :-
.
My invention relates to printing machines of the known kind in which a cylinder
having a printing forme on a flat part on its underside ascends and descends
printing on the uppermost of a pile of envelopes or sheets, while inking rollers are
caused to revolve partly around it. I shall describe my improvements on a
machine of this kind referring to the accompanying drawing shewing a part side
view of the cylinder and parts connected therewith.
In order to give the cylinder C a steady true movement as it reciprocates I
provide on its axis at each end a slipper or a roller which works in a vertical
guide G. For giving the inking rollers I their revolving movement partly around
the cylinder C and timing that movement to suit the stroke of the cylinder, I adopt
the following arrangement. On the frame F which carries the inking rollers and
which is pivotted on the axis A of the cylinder C I fix a pinion P which gears
with a rack R on a vibrating V arm pivotted to the back frame M of the machine
in such a position that when the cylinder C is at the end of its down stroke, this
arm is horizontal or nearly so. As the cylinder moves up or down near the lower
end of its stroke, the rack R gives very little movement to the pinion and inking
Гризла 9/1

page_text: rollers, but when the cylinder moves through other parts of its stroke, the rack R
gives considerable movement to the pinion P and consequently to the inking
rollers 1.
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 :-
In a printing machine having a reciprocating vertically guided cylinder, causing
the inking rollers to partially revolve around the cylinder by means of a pinion
fixed on the frame carrying the rollers, and gearing with a rack on a vibrating arm
pivotted on the back frame of the machine, substantially as described.
Dated this 20th day of August 1894.
ABEL & IMRAY,
Agents for the Applicant.