Year: 1886

page_text: We GEORGE KENNEDY and ROBERT KENNEDY both of New Westminster in the
Province of British Columbia and Dominion of Canada 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:-
The object of our Invention is to provide for printing presses a device for
perforating paper in the operation of printing which will be raised up into position
to be engaged by the paper while the paper is being printed and will be dropped
down below the surface of the type when the form is inked
Our Invention consists in a hollow rule containing a serrated cutter mounted on
series of links to give it a parallel motion, and in the combination therewith of an
angled lever pivoted in the hollow rule and arranged to be engaged by the yielding
contact carried by the platen of the press.
Reference is to be had to the accompanying drawing forming part of this
Specification in which figure 1 is a vertical transverse section of a portion of a
printing press, shewing the application of our Invention. Figure 2 is a detail
sectional perspective view of a part of our improved perforator. Figures 3 and 4
represent different forms of yielding contacts for working the perforator. Figure 5
Similar
is a detail view of the end of the hollow rule, shewing the lever case.
letters of reference indicate corresponding parts in the different figures of the
drawing.
The hollow rule. A is formed of metal strips a connected together in any
convenient way with a back piece b interposed between the metal strips a, the:
free edges of the strips being provided with inwardly projecting lips a leaving.
between them a narrow slit d. The strips a are preferably clamped together by
clips 8 which are received in recesses in the sides of the strips a and which may be
removed whenever it is desirable to clean the perforator; but we do not confine
ourselves to this particular method of holding the parts together. In the hollow
rule thus formed is supported a serrated knife edge cutter B upon links e which
are pivoted to the back of the cutter and to the strip b forming the back of the
hollow rule A. In the present case there are three such links, but this number
may be increased or diminished as circumstances may require. One end of the

page_text: cutter is pressed by a spring fabutting against the closed end G of the hollow
rule A, the opposite end of the cutter is widened and provided at its inner corner
with a concave notch h for receiving the rounded end i of an angled lever C
pivoted on the pin extending through the hollow rule A. The outer end of the
angled lever C projects beyond the end of the hollow rule A in position to be
engaged by the yielding contact pieco D carried by the platen and is protected
from the ink roller and from injury, by the hood al projecting from the hollow
rule. The yielding contact D consists of a trapezoidal block k secured to the
centre of a bowed spring which is held is place on the supporting plate m by
clips n extending over the ends of the spring and secured to the edges of the
plate. The ends of the spring are slotted to receive pins o which project from the
clips into the slots of the spring. The edge of the supporting plate m is
provided with a right angled lip which is received between the blanket q on the
platen E and the frame F surrounding the platen and holding the blanket q in
place. The block k is in this manner, held at the edge of the platen in position to
engage the outer end of the angled lever C. Where the press is not provided
with the frame F for holding the blanket in position the yielding contact is held
in place by pointed pins projecting from the edge of the plate m in lieu of the
lip p. These pins are inserted in the blanket and serve to retain the yielding
contact in position for use. The perforating device is clamped in the form in the
chase in the same manner as an ordinary rule, in the position in the form at which
the perforations in the printed sheet are desired. The form is clamped on the bed
of the press, and the sheet to be printed is placed on the platen and carried
forward against the form contained by the chase G in the usual way, but just
before the contact of the paper with, the face of the type, the yielding contact D
strikes the outer end of the angled lever C turning it on its pivot, thus swinging
the cutter B forward and outward on the links e (as indicated in dotted lines)
causing the serrated edge of the cutter to project above the face of the type
sufficiently to insure the perforation of the paper at the desired point, when the
paper is brought into contact with the face of the type to receive the impression.
When the platen, together with the printed paper is removed from the type, the
yielding contact D is also removed from the end of the angled lever, and the
spring pushes the cutter B forward, causing it to swing on the links e and retreat
within the hollow rule A so that when the form is inked the inking rollers will
pass over the cutter without being injured thereby. The employment of the
yielding contact D permits of applying the perforator to the press without nice
adjustments as the spring will allow the platen to move forward if the lever C
should strike the chase G before the platen has completed its motion.
It is obvious that a number of our improved perforators may be applied in a
single form if desirable.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed wo declare that
what we claim is ;—
:
1. In a perforated attachment for printing presses, the combination with a
hollow rule of a perforated cutter, and means substantially as shewn and described
for projecting the cutter beyond the face of the type before the impression of the
type is made upon the paper.
2. In a perforating attachment for printing presses, the combination of the
hollow rule A, the serrated cutter B, the links e pivoted in the rule and pivotally
connected with the cutter, the spring f arranged to withdraw the cutter within
the rule, the angled lever C pivoted in the rule and adapted to engage the end of
the cutter, and a contact carried by the platen for engagement with the angled
lever substantially as herein shewn and described.
3. The combination of the hollow rule A, the serrated cutter B, links e pivoted
to the cutter and to the back of the hollow rule, the spring f the angled lever C

page_text: pivoted in the hollow rule, and the yielding contact D formed of the spring 1
carrying the block k, the base plate m, and the fastening device for securing it to
the platen as described.
4. In a perforating attachment to printing presses, the combination with the
hollow rule A and cutter operating lever C of the hood a¹ attached to the hollow
rule and enclosing the outer end of the lever substantially as herein shewn and
described.