IMPROVEMENTS IN PRINTING MACHINES
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by William Taylor at the Office of the
Commissioners of Patents on the 2nd November 1877...
WILLIAM TAYLOR, of Great Driffield, in the County of York. "IMPROVEMENTS IN
PRINTING MACHINES."
The Invention has for its object improvements in printing machines, and relates
to a novel combination and arrangement of parts whereby a cheap,. compact, and
efficient machine is produced. For this purpose I employ a bed plate on which is
fixed a vertical standard. To this standard is jointed, by means of two links of
equal length, a frame carrying the type bed at its lower end, by which means a
parallel motion is obtained to the type bed. The upper of the said links forms
part of a lever, which is prolonged at both the front and back, the front pro-
longation serving as a lever, by which the machine is operated, and the back as
a lever to carry and operate the frame carrying the distributing and inking
rollers, and, if required, a counterbalance weight.
The type bed is inverted in position and is connected to its frame by means
of a screwed stud projecting from the back thereof, and held in position by a fly
nut thereon, acting against a cross bar on the frame to hold the type bed up to the
frame. The back of the type bed is provided with guides to act in combination
with guides on the frame to secure the correct adjustment thereof in position.
The platen is supported in a suitable recess in the bed of the machine, and is
capable of adjustment horizontally by means of four screws acting, one at or near
eacli corner thereof, and the back of the platen is provided with a clamp to secure
the press cloth in position over the same.
The inking roller is mounted in arms or a frame pivotted or pin-jointed to the
frame fixed to the back extension of the operating lever, and such arms are acted
upon by springs to retain the inking roller in a certain position with regard to the
frame, until in the course of its motion under the type bed small wheels on the
ends of the inking roller come against and are caused to run upon guides or ways
at the sides of the type bed when the springs act to keep the inking roller up to
its work.

page_text: The distributing roller is mounted in arms or in a frame pivotted or pin-jointed
to the aforesaid frame, carried by the operating lever, and by its weight is caused
in its course to run on the surface of a curved inking plate or table over which the
inking roller also runs. This curved inking plate or table is held in position at its
upper end by pivotted supports, and is supported at its lower end by a spring or
springs, which force it upwards against the inking and distributing rollers with
the required pressure.
The links of the parallel motion are preferably formed to work on pointed pivots
to afford facility for adjustment.
The pressure in printing is regulated by means of a screw in the top of the
vertical frame acting against the back extension of the operating lever.
The bed of the machine is preferably placed in a somewhat inclined position.
Instead of the type box or chase and platen being horizontal, the machine
may be so constructed that they shall be vertical, or nearly so, the same arrange-
ments of parallel motion and inking mechanism being maintained.
The machine may be adapted to work by foot by connecting the back end of the
operating lever to a treadle pivotted below the table. Such connection may either
be made with the treadle direct, or by means of a fly wheel and crank.