Improvements in the Arrangements of the Inking Apparatus of Certain Descriptions of Printing Machinery.
Year: 1895

page_text: Date of Application, 16th Nov., 1895-Accepted, 21st Dec., 1895
COMPLETE STECIFICATION.
Improvements in the Arrangements of the Inking Apparatus of
Certain Descriptions of Printing Machinery.
I, ANGUS BAROLAY of No. 91 Stanhope Street, in the City of Newcastle-on-
Tyne, Machine 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 :-
In certain descriptions of printing presses, well known in the trade, a recipro-
cating table is employed, one part of which table carries the type, and another
part of the table, an inking slab and distributing and inking rollers, independently
of the slow moving roller arrangement for giving the supply of ink. These inking
and distributing rollers are usually fixed as regards horizontal movement, but free
to rise and fall slightly in slotted bearings, so as to allow the weight of the roller
to bear on the inking slab and the type. These rollers revolve by reason. of the
friction arising from the fact of their weight resting upon the inking slab and the
type. The reciprocating motion of the table causes the rollers to revolve in
opposite directions following the movement of the table as is well understood.
The rollers are usually formed of a mixture of gelatine, glycerine, treacle, or
similar ingredients, so as to give the requisite elasticity and other qualities
necessary for the even distribution of the ink upon the type. The composition is
cast usually on a steel spindle projecting at the ends, and forming a core to the
roller. The rollers being of this somewhat delicate composition, they are usually
the part of the machine which causes the most trouble in continuous working.
As usually constructed the initial revolution of the rollers in the desired
direction is produced by the impact of the edges of the reciprocating_table_before
referred to coming in contact with the actual composition of the roller. But the
rate of movement of the table is such that to overcome the inertia of the rollers
when in a state of rest, and still more to overcome the impetus of the roller if it
should be revolving in the opposite direction, and to produce in a very short space
of time the desired rate of rotation, a somewhat severe strain is put upon the
tender material of the roller, and this in the course of time chips, or roughens it,
and any chips or small particles of the roller are apt to get embedded in the type,
and of course to disfigure the impression or to require cleaning out.
Now I by my invention cause the roller to acquire its rotary motion in the
desired direction before the edge of the table reaches the actual soft material of the
roller itself, and I thus avoid, or at least minimise the strain usually put upon
the composition of the roller.
The most simple form of apparatus for the carrying out of my invention is an
attachment to the reciprocating table before mentioned of a leather covered arm
projecting in advance of the table at its edge, in the direction of its movement, and
bearing not on the composition part of the roller, but upon the projecting steel
spindle forming its core, a part which without injury can bear the strain due to
impact and inertia before referred to. I prefer to make this attachment of such
form as that it ceases to operate upon the spindle of the roller just as the table
comes in contact with the composition, and I may make it adjustable by spring, or
setting arrangements, so as to more effectually adapt it to different weights of
rollers, and different rates of movement. Such parts of the mere mechanism may
be varied within wide limits without interfering in any way with the principle of
my invention.

page_text: 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 :-
In a printing machine, having, a reciprocating table and composition rollers a
device whereby the desired motion is imparted to the roller without impact of the
table edge on the composition part of the roller, substantially as described.
Dated this Fifteenth day of November 1895.
J. JAMESON,
Akenside Hill, Newcastle-on-Tyne, Agent for Applicant.