Improvements in Printing Machines.
Year: 1896

page_text: Date of Application, 13th July, 1896-Accepted, 22nd Aug., 1896
COMPLETE SPECIFICATION.
Improvements in Printing Machines.
I, JULIUS WEZEL, of 17 Dresden Street, Leipzig, in the Empire of Germany,
Merchant, 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 :-
In the annexed drawings is represented a printing machine the construction and
operation of which differs from the hitherto known cylinder machines. In this
machine there is avoided the inconvenience found in printing with a printing
cylinder turning in one direction that the impression is unequal in the direction of
the revolution.
In such a case the drawings augment on one side that is to say it gets
successively stronger and on the other side it diminishes, that is it gets fainter.
This inconvenience is avoided in the new machine the printing cylinder being
alternately turned for printing in the one and the other direction.
The out-put of the machine is considerably augmented since it works with two
laying cylinders.
The arrangement, and operation of the machine as well as the co-operation of the
main parts are řepresented in the annexed drawings.
Fig. 1 is a vertical longitudinal section
Fig. 2 an end view.
Fig. 3 a section of the side part of the machine on line R R of Fig. 1.
Fig. 4 a view of the spring operated laying cylinders.
Figs. 5 to 12 show the successive stages of the working of the machine.
The printing cylinder A is arranged to turn in a suitable manner in the framing
of the machine and on the cylinder axle a is the crank 6 sliding upon the latter
and moving with a pendulum like motion.
This crank b is in connection with the rotation crank k upon the shaft c by means
of the rod Z.
Upon the cylinder axle is the gear wheel g which gears with the crank wheel h.
The axle of the crank wheel swings in the track of the crank b and the crank
wheel by its gearing with the fixed toothed segment S and with the wheel g effects
consequently a revolution of the cylinder wheely and of the cylinder A itself in the
one or other direction according to the direction of its own movement..
This revolution of the cylinder A is in consequence of the crank motion and the
gearing of wheels directed forwards and backwards so that the printing plate moves
alternately in the one or the other direction of revolution.
The laying cylinders B' B receive their movement of revolution from the printing
cylinder by means of the wheels k and d, which have an interruption in the circuit
of their teeth for the time of rest.
The laying cylinders are provided with spring operated bearings whereby a certain
elasticity of the on pressers and a regulating thereof can be effected.
The laying cylinders are provided with the pins which serve to fix the cylinders
when they are respectively out of action, and to bring them again into gearing.
In order to obtain this effect the pins are brought into connection with
forks H which are swung by the cam disc by means of a connecting rod when
the resting period begins or ceases.
The inking train F is in the centre above the printing cylinder whilst under the
laying cylinders B' B2 are arranged the wiping or wetting cylinders W' W'.
The working of the machine is shown on Sheet 2 in the successive Figs. 5-12.

page_text: In Fig. 5 the cylinder moving crank K is in its extreme position to the left
and the printing plate e begins to turn up on the right, so that it passes under
the wiping rollers W' and the laying cylinder 'B' which is kept motionless and at
a certain distance. The printing continues its motion round to the left under the
colour rollers F, Fig. 6, in order to print with the laying cylinder B', Fig. 7, which
by moving the fork H has been brought into gear.
In Fig. 8 the pin of the just operated laying cylinder B is caught by the fork and
brought out of gear with the printing plate cylinder wheel k, so that it is kept at
rest, Fig. 9.
In the meantime the crank K has reached its extreme position to the right,
Fig. 9, and the return motion begins.
The printing plate e passes now under the wiping rollers W3 and the now
motionless laying cylinder B' and under the colour rollers F, Fig. 10, to the laying
cylinder B², Fig. 11, which by a corresponding movement of the swinging fork H
is brought from its resting position into gear with the printing cylinder wheel k, in
order to print in the same manner, as was the case before with the laying cylinder B¹..
By the alternate movement of the crank b and the forward and backward
revolution of the printing cylinder the same printing plate e is printed from alter-
nately in the one and the other direction so that the printing is equal on both sides.
It may also be pointed out that by the arrangement of two laying cylinders for
alternate operation, printing output of the whole machine in a given time is doabled.
The construction of the machine is simple and such that a secure co-operation
of the working parts is always obtained, because all the movements are made
automatically.
The size of the machine as well as the form and the arrangement of single parts
can be varied without departing from this invention.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. Plate cylinder printing machine in which the printing cylinder A arranged
between two laying cylinders B1 B2 is adapted to rotate alternately forwards and
backwards and at each movement period. one only of the two laying cylinders is
operated while the other is kept at rest.
2. The construction of the printing machine shown in Claim 1 in which the
propelling of the printing cylinder is performed by means of a toothed wheel h
which by the driving shaft of the machine is moved to and fro and gears on one side
with a fixed toothed wheel segment S and on the other side with the toothed wheel g
of the printing cylinder.
Dated this 13th day of July 1806
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents for Applicant.