Improvements in Sheet Delivery Mechanism for Rotary Printing Machines.
Year: 1896

page_text: Date of Application, 25th Sept., 1896
Complete Specification Left, 27th May, 1897-Accepted, 3rd July, 1897
PROVISIONAL SPECIFICATION.
Improvements in Sheet Delivery Mechanism for Rotary Printing
Machines.
[A communication from abroad from THE FIRM OF E. NISTER, of Nurnberg, Bavaria,
Germany, Art Publishers.]
I, WILLIAM LLOYD WISE, of 46 Lincoln's Inn Fields, in the County of London,
Consulting Engineer and Chartered Patent Agent, do hereby declare the nature of
this invention to be as follows:-
The delivery of the sheets in rotary printing-machines, especially in rotary litho-
graphic printing machines, has been heretofore effected chiefly in such a way that
the printed sheet of paper coming from the printing cylinder is drawn over a
revolving drum and is thence delivered on to the delivery table by means of an
arrangement of rollers and tapes in combination with delivery rods. In this method
the sheet lies during its movement towards the delivery table, with its printed
surface always in contact with the surface of the drum or with the tapes and delivery
rods of the delivery apparatus, whereby the ink that has been freshly applied to the
sheet is liable to get smeared.
Now this invention has for object to obviate this disadvantage. For this purpose
there is employed in place of the drum, a simple gripper rod which is caused to
revolve, and which first takes the sheet off the printing cylinder, and then causes
the said sheet to hang and vibrate and at the same time turns the sheet over, and
finally conveys the said sheet to the tapes or the like of a rocking frame in such a
manner that only the non-printed surface of the sheet is caused to bear upon the
same, so that smearing of the printing ink caunot take place.
The arrangement and mode of operation of sheet delivery apparatus according to
this invention is illustrated by Figs. 1 to 5 inclusive of the accompanying drawings.
Figs. 1 and 2 show the printing cylinder with the grippers 6 which serve to
grasp a sheet fed from the pile of sheets A. Adjacent to the printing cylinder a
and mounted to turn about an axis parallel thereto, are two arms c c or the like
which are arranged laterally of the framing of the machine in a pivotal manner, and
which carry at their ends the connecting rods and e (Fig. 5) with the grippers f
so that the whole gripping mechanism resembles a cranked axle. The arms cc and
the printing cylinder a rotate with equal peripheral velocity, but their directions of
rotation are opposite and are indicated respectively by the arrows shown in Figs. 1
and 2. As shown in Figs. 3 and 4, there is provided above the rotary arms c c a
device which is herein called a displacer. This displacer g comprises bent lever
arms which are moved forwards and backwards about the pivots h, and are connected
with each other by means of parallel rods i.
On a rocking frame (Figs. 1 and 2) arranged below the path of the grippers f
there is mounted a tape guide of known construction provided with the rollers
and m. The direction of rotation of which is the same as that of the arms c.
The mode of operation of the sheet delivery apparatus is as follows:-
The sheets A. to be printed are fed from a laying-in table towards the grippers b

page_text: of the printing cylinder a by which they are gripped in succession and carried one
at a time over the printing plate. During the printing process the displacer g, i, is
at rest, and the rocking frame k with its tapes and tape rollers land m remains in
the horizontal position. After about half a revolution has been made, the printing
cylinder will have assumed the position shown in Fig. 1. The grippers 6 of the
printing cylinder then open and deliver the printed sheet A' to the grippers f of the
gripper rods c and d. When the sheet has completely left the printing cylinder a,
the sheet begins to execute a peculiar pendulating movement which is shown in
Figs. 3 and 4 and is produced partly by reason of the weight of the freely suspended
sheet, and partly by the movement of the arms c which continue to revolve with a
. uniform speed.
The forward movement of the displacer g now takes place, the displacer imparting
to the sheet a further impulse by means of the parallel rods i. This impulse serves
to ensure the turning over or displacement of the sheet into the position shown in
Fig. 4 in such a manner that the said sheet is laid with its non-printed surface upon
the tapes or equivalent of the frame k which has moved in the meantime into its
extreme upper position (Fig. 2). To enable the sheet to be thus laid upon the frame z
the gripper apparatus c d is suitably rotated and the grippers fopened. The sheet A¹
is carried down with the frame k, and finally the sheet is placed upon the delivery
table. Then the displacer g reassumes its original position of rest (Fig. 3), and the
operation of the machine begins anew.
In small rotary printing machines the displacer g may be omitted because in these
cases, the pendulating motion of the sheet is alone sufficient to ensure the turning of
the same to one side in position to take upon the upper side of the rocking frame k
when the same is moved upward. Also the rocking frame may in some cases be
omitted, and the operation be effected by hand or by any other known or suitable
means.
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
Improvements in Sheet Delivery Mechanism for Rotary Printing
Machines,
A communication from abroad from THE FIRM OF E. NISTER, of Nurnberg, Bavaria
Germany, Art Publishers.
I, WILLIAM LLOYD WISE, of 46 Lincoln's Inn Fields, in the County of London,
Consulting Engineer and Chartered Patent Agent, do hereby declare the nature of
this invention and in what manner the saine is to be performed to be particularly
described and ascertained in and by the following statement:-
The delivery of the sheets in rotary printing-machine especially in rotary litho-
graphic printing machines, has heretofore been effected chiefly in such a way that
the printed sheet of paper coming from the printing cylinder is drawn over a
revolving drum and is thence delivered on to the delivery table by means of an
arrangement of rollers and tapes in combination with delivery rods. In this method
the sheet lies during its movement towards the delivery table, with its printed
surface always in contact with the surface of the drum or with the tapes and delivery
rods of the delivery apparatus, whereby the ink that has been freshly applied to the
sheet is liable to get smeared.

page_text: Now this invention has for object to obviate this disadvantage. For this purpose
there is employed in place of the drum, a simple gripper rod which is caused to
revolve, and which first takes the sheet off the printing cylinder, and then causes
the said sheet to hang and vibrate and at the saine time turns the sheet over, and
finally conveys the said sheet to the tapes or the like of a rocking frame in such a
manner that only the non-printed surface of the sheet is caused to bear upon the
samme, so that smearing of the printing ink cannot take place.
b
The arrangement and mode of operation of sheet delivery apparatus according to
this invention is illustrated by Figs. 1 to 5 inclusive of the drawings filed with my
provisional specification. In these drawings Figs. 1 and 2 show the printing
cylinder a with the grippers 6 that serve to grasp a sheet fed from the pile of sheets A.
Adjacent to the printing cylinder a and mounted to turn about an axis parallel
thereto, are two arms c and c or the like which are arranged laterally of the framing
of the machine in a pivotal manner, and which carry at their ends the connecting
rods d and e (Fig. 5) with the grippers f, so that the whole gripping mechanism
resembles a cranked axle. The arms c c and the printing cylinder a rotate with
equal peripheral velocity, but their directions of rotation are opposite and are
indicated respectively by the arrows shown in Figs. 1 and 2. As shown in Figs. 3
and 4 there is provided above the rotary arms c c a device which is hereinafter
called a displacer. This displacer g comprises bent lever arms which are moved
forwards and backwards about the pivots h, and are connected with each other by
means of parallel rods i.
On a rocking frame k (Figs. 1 and 2) arranged below the path of the grippers f
there is a tape guide of known construction provided with the rollers and m, the
direction of rotation of which is the same as that of the arms c (Fig. 2).
The mode of operation of the sheet delivery apparatus is as follows:-
The sheets A to be printed are fed from a laying-in table towards the grippers b
of the printing cylinder a; by which they are gripped in succession and carried one
at a time over the printing plate. During the printing process the displacer gi is
at rest and the rocking frame k with its tapes and tape rollers land m remains in
the horizontal position. When about half a revolution has been made, the printing
cylinder, will have assumed the position shown in Fig. 1. The grippers 6 of the
printing cylinder then open and deliver the printed sheet A¹ to the grippers f of
the gripper rods c and d. When the sheet has completely left the printing cylinder a,
the sheet begins to execute a peculiar pendulating movement which is shown in
Figs. 3 and 4 and is produced partly by reason of the weight of the freely suspended
sheet, and partly by the movement of the arms c which continue to revolve with a
uniform speed.
This
The forward movement of the displacer g now takes place, the displacer imparting
to the sheet a further impulse to the right by means of the parallel rods i.
impulse serves to ensure the turning over or displacement of the sheet into the
position shown in Fig. 4 in such a manner that the said sheet is laid with its non-
printed surface upon the tapes or equivalent of the frame k which has moved in the
meantime into its extreme upper position (Fig 2). To enable the sheet to be thus
laid upon the frame k the gripper apparatus c is suitably rotated and the grippers f
opened.
The sheet A¹ is carried down with the frame k, and finally the sheet is
placed upon the delivery table. Then the displacer g reassumes its original position
of rest (Fig. 3), and the operation of the machine begins anew.
In small rotary printing machines the displacer y may be omitted because in
these cases the pendulating motion of the sheet is alone sufficient to ensure the
turning of the same to one side in position to take upon the upper side of the rocking
frame when the same is moved upward. Also the rocking frame may in some
cases be omitted, and the taking-off operation be effected by hand or by any other
known or suitable means.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is.

page_text: 1. In a rotary printing machine, sheet delivery apparatus comprising a rotary
gripping device c, d, e, adapted to take off a printed sheet from the printing cylindera,
and cause it to pendulate and at the same time to turn over or become reversed
in position so that the sheet can be conveyed away with its non-printed surface
downwards and towards it may be a rocking frame k provided with tapes or equivalent
guiding means, substantially as described.
2. In a rotary printing machine, sheet delivery apparatus comprising a rotary
gripping device, a displacer, and rocking frame with tape or equivalent guiding
means, the whole constructed arranged and operating substantially as described and
shown for the purpose specified.
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.