Improvements in Carrying Mechanism for Removing Printed Sheets from Litho and Letterpress Printing Machines.
Year: 1897

page_text: Date of Application, 17th Apr., 1897-Accepted, 29th May, 1897
Improvements in Carrying Mechanism for Removing Printed Sheets
from Litho and Letterpress Printing Machines.
1, GEORGE NEWSUм, of 5 Fairfax Road, Beeston Hill, Leeds, in the County
of York, Printers Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and
nscertained in and by the following statement :-
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This invention relates more particularly to that class of machine known as
double revolution cylinder machine" and the object of the invention is to remove
the printed sheets from litho and letter press machines in such a manner that, the
wet surface of the sheet is not smeared or erased by being brought in contact with
any part of the machine.
In order that the said invention may be well understood, the accompanying
drawings illustrative thereof, are referred to in the following description by letters
and figures, like letters and figures referring to like parts where they appear.
Fig. 1 represents a plan illustrative of about one half of the width of a portion of
a litho or letter press printing machine to which my improvement is applied.
Fig. 2 is a side sectional elevation of same through line A. B.
The cylinder C. is of the ordinary construction and motion is imparted to it and
to the reciprocating table of the machine in the manner as hitherto. The cylinder
revolves in the direction of the arrow, and is fitted with grippers D. of the usual
construction which are operated in the ordinary manner.
Mounted on the shaft of cylinder C. is a spur wheel W. gearing into a spur
wheel W¹ secured on shaft E. extending across the machine, and on to which are
secured two chain wheels F. one at each side of the machine. The chains G.
around these wheels pass over similar wheels F¹ also, and support a gripper shaft H.
provided with gripper fingers J. which when closed in their normal position, press
against the edge of a bar J' secured to the said chains; the before mentioned
wheels F¹ are secured on shaft E' extending across the machine and supported by
suitable standards K.
When the cylinder C. arrives in or about the position shown by Fig. 2 the
grippers J. are operated by a lever secured to the end of gripper shaft H. Ou
the lever coming in contact with the cam plate L. the grippers J. take hold of
the sheet hitherto held by the grippers D. on cylinder C, the last mentioned
grippers then immediately release their hold of the sheet, thus allowing the
grippers J. to carry the same in the direction of the arrow over the travelling tapes
or the like M. and deposit it on the adjustable delivery board N. with the edge of
the sheet against the end stop O. and between the adjustable side stops P, one stop
being placed on each side of the delivery board.
The sagging of the chains G. is prevented by bars Q. and Q' secured beneath
same, and the grippers J. are opened for releasing the sheet, on the before mentioned
lever secured at the end of gripper shaft H. coming in contact with the cam plate L¹
fixed to a standard K, the grippers J. closing when the lever is clear of the cam
plate by the action of the spiral spring S. coiled around the gripper shaft H.
which are opened again to carry away the next sheet from the cylinder C. in the
manner as before described.
The tension of the chains G. is regulated by a screw R. on each side of the
machine, and the position of the delivery board N. is adjusted by a toothed rack T.

page_text: and pinion T by the operation of the latter, the board N. is moved into any position
required for receiving the sheets, or for the purpose of bringing the said board into
a position for facilitating the removal of the printed matter therefrom, and thereby
reduce the liability of accidents to the operators.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination of the cylinder C. with wheels F. and F¹, chains G. aud
grippers, all arranged substantially in the manner and for the purpose as
hereinbefore set forth.
2. A movable delivery board N. combined with chain carried grippers J. arranged
and operated substantially in the manner and for the purpose as hereinbefore set
forth.
3. Chain carried grippers J. and bar J' combined with a rotating cylinder C.
provided with grippers D. substantially in the manner and for the purpose as
hereinbefore set forth.
JOHN WAUGH,
Agent.