Iм- PROVEMENTS IN OR APPLICABLE TO LETTER-PRESS PRINTING MACHINES
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Josiah Wade at the Office of
the Commissioners of Patents, with his Petition, on the 13th July
1872.
I, JOSIAH WADE, of Halifax, in the County of York, Printing Machine
Maker, do hereby declare the nature of the said Invention for "Iм-
PROVEMENTS IN OR APPLICABLE TO LETTER-PRESS PRINTING MACHINES," to be as
follows:-
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This Invention relates to that class of printing machines commonly
known as "platen" machines, and more particularly to those worked by
treddle or pulley and strap driven by steam or other motive power, and
wherein the platen is caused to oscillate into one position to receive the
feed of paper or other material to be printed, and then into another
position for it to receive the impression from the type; also wherein
the type bed and inking apparatus are mounted on an oscillatory frame"
working or moving into contact with the platen at suitable times to give
the impression, and then returning to have the type inked again. .
The imnmovements consist
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page_text: .
side capable of being turned on their axes, and held by catches and
ratchet so as to stretch the said blanket and release it at pleasure, or as
required, or a loose rod or gripper at one side and a roller with ratchet
and catch at the other side.
Secondly. In the construction and application to the platen of swivelling
guides which are capable of being set to any required position thereon,
such guides being provided with a series of holes to receive pins for
holding the sheets of paper or other material to the platen during the
process of printing.
Thirdly. In the application of a spring finger to the ordinary frisket
adjustable thereon by set screw or wedge, and, extending at right angles
thereto over the platen to hold the sheets of paper or other material to
its surface during the process of printing.
Fourthly. In the construction and application of a tumbler, a slotted
lever, and a rod, for working the platen, instead of a cam as heretofore,
which is operated by or from the motion of the type bed frame, whereby
the relative action thereof and of the type bed is rendered more, certain,
and suitable provision is made in the slotted lever for effecting a dwell
of the platen at the place for receiving the feed, and also at the place
for the impression.
Fifthly. In the application to the type frame of an eccentric shaft
for connecting the rods to which give motion from the ordinary cranks,
by means of which shaft the type can be readily set or adjusted to the
platen or removed from the platen, in order to secure a more perfect
distribution of ink.
Sixthly. In the application and use of an eccentric to the crank shaft
to which is attached the rod connected with the ink roller frame instead
of the fixed bracket now used for that purpose, by which an inde-
pendent motion is given to the said ink rollers' frame in addition to that
caused by the motion of the type bed frame so as to adjust the times of
motions of the several parts respectively.
Seventhly. In the application of leather or other suitable material to
either the bearers or the runner on the ink rollers to produce more
adhesion, and thereby to insure the rotation of the said rollers when
passing over the inking table and the type form.
Eightly. In the application of a spring catch lever to the inking
table which is hinged on the axis or bearers thereof, and is operated by.

page_text: the ordinary lever for turning or giving motion to the table at each
stroke of the machine. The motion of this lever being radial, the catch
is always certain to take properly into the ratchet teeth of the inking
table.
Ninthly. In the application of a combined strap guide and break, or
brake for quickly stopping the motion of the machine without the
attendant having to apply his hands to the fly' wheel as heretofore. I
employ a rocking shaft to which is fixed a lever arm, in which is a slot
hole, one part being at right angles to the other and into which a pin
on the end of the ordinary strap guide rod is inserted, whereby any
motion given to the rocking shaft moves the strap guide and throws the
pin into one or other part of the slot hole, which holds it there until the
attendant operates (by means of a handle) the rocking shaft, and on this
shaft is also another lever arm, to which is attached (by a chain or rod)
an ordinary break or brake, which is pressed by the action of the
attendant on the rocking shaft against the periphery of the fly wheel
simultaneously. with the throwing of the strap upon the loose 'pully.
This part of my Invention may be applied to cylinder printing machines
as well as platen machines.
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