Apparatus for Laying Sheets on, Printing Machines with aj Continually. Rotating. Printing Cylinder..
Year: 1896

page_text: Date of Application, 5th Aug., 1896-Accepted; 5th. Sept., 1896
[Communicated from abroad by THE MASCHINEN-FABRIK, JOHANNISBERG, successors
to the Firm of: KLEIN FORST. AND. BOHN, of Gersenheim-on-Rhine, Germany,
Printers.]
Apparatus for Laying Sheets on, Printing Machines with aj
Continually. Rotating. Printing Cylinder..
I, SAMUEL SIDNEY BROMHEAD of 97, Newgate Street, London, Patent Agent
(communication from abroad), 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 present invention has for its object to effect the exact feeding of the laid on
sheet to the continually rotating printing cylinder in printing machines by means of a
new laying-on apparatus.
The printing cylinder A is as usual in connection either with another cylinder,
called, the platen cylinder, or.with, the flat "forme." by means of, toothed wheels or a
rack. These parts are not here specially shown, because they are generally-known.
Upon the laying-on. board B, on, which the,sheet is laid in the customary manner, are
arranged laterally two, bearings C, C, which are connected with each other by a shaft,D,
(Figs. 1, 2, 3, 4). On this rod, D, are the supports, E which carry a prismatic bar a
at their, lower ends. Upon this bar, a, the clamps b, are adapted to slide laterally, and
in these, clamps, b, are..arranged fingers. c., adapted to be displaced, vertically, and
against which, the catches,e bear when they take hold of the sheets laid, on.
Upon the prismatic bar a are, moreover provided two, adjustable slides (Fig. 4).
Each, of, these, slides, carries, at its lower end, a spring 9, bent to an, angle, and
which bears with an aperture upon a spring h made of appropriate shape and
arranged on the laying board B. On the supports E are moreover arranged the
bearings Fin which is held a shaft i which carries the catches e. These catches e
are pulled by the spring s against the fingers c.
By a crank G arranged upon the shaft D and operated by means of the draw
rod H, lever I and eccentric K, the supports E receive a rocking or swinging
motion corresponding to the circumferential velocity of the cylinder A. With the
supports all the parts attached to the same will of course make a
rocking motion.
The catch rod i receives its movement from a crank k arranged on it and a
roller. The crank is pushed upwards by a lever m which receives its motion
from a draw rod n, lever o, and eccentric p, the catches e being opened.
The mode of operation of the mechanism is as follows:
The supports E with all the parts carried by them have been moved towards the
laying board B, by the eccentric K, draw rod H, and crank G, and stop there. The
catches e have been opened by the eccentric p, draw rod n, lever m, and crank k
(Fig. 1).
Now the sheet to be printed, which is brought to its proper lateral position by
an ordinary sliding apparatus, is laid against the springs g and seized by the closing
the point of the catch e forcing the sheet against the finger c.
catches
e,
As soon as the catches e have seized the sheet, the supports E and at the same
time the catches e with the seized sheets move slowly forwards in the direction of
rotation of the cylinder A, until they have reached the position shown in Fig. 2 at a
circumferential velocity equal to that of the printing cylinder A.
The catches r, of the printing cylinder A, which after they have transferred the
printed sheet to the catches of the take off cylinder Z, have not been closed again,

page_text: have, in the course of the turning movement of the cylinder A, passed below the
front-edge of the sheet freshly laid on, and have been closed in the position shown
in Fig. 2 and taken hold of the sheet transferred to them by the catches e.
In the further movement of the cylinder A, the supports E and catches e,
continue to turn at the same circumferential velocity as the cylinder A, then the
catches e are opened, inasmuch as the roller I passes against the lever m (Fig. 3) so
that the sheet seized by the catches z can follow these and the rotary movement of
the cylinder A.
The turning movement of the support E is retarded. until it stops altogether.
When the cylinder A has passed, with that portion of its circumference which serves
as the printing surface, to the position shown in Fig. 3, the supports E turn
backwards (Fig. 1) and a fresh sheet is laid on.
The printed sheet in the continued movement of the cylinder A is transferred by
the latter in the ordinary manner to a take-off cylinder Z, and is carried away by
the latter and taken off:
The catches of the cylinder A are not closed again after giving the printed
sheet to the take off cylinder Z, but then repeating the described operation, take
hold of the fresh sheet laid on.
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:
An apparatus for laying sheets on printing machines having a continuously
rotating printing cylinder, by which the sheet lying on the fixed laying board E
is taken hold of at its front edge by means of catches e swinging to and fro, and
conducted to the printing cylinder A in such a manner, that at the moment when
the catches connected with the printing cylinder A are closed the sheet has attained
a velocity equal to the circumferential velocity of the cylinder A, and has at the
same time reached such a position that the closing catches r properly. seize the sheet,
whilst the swinging catches e are opened in order to allow the sheet to move
forwards with the printing cylinder, whereupon the catches e move backwards again
to take a further sheet from the laying board, as herein described and set forth.
Dated this 5th day of August 1896.
S. S. BROMHEAD,
97, Newgate Street, London.