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Патент USA US2056922

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Oct.v 6, 1936.
Filed ‘Oct. 20, 1954
2 Sheets-Sheet. 1
Oct. 6, 1936.
Filed Oct. 20, 1934
,2 Sheets-Sheet 2
Patented Oct. 6, 1936
William Gegenheimer, Baldwin, N. Y., assignor to
Willard Manufacturing Corporation, New York,
N. Y., a corporation of New York
Application October 20, 1934, Serial No. 749,244
2 Claims. (Cl. 101-410)
This invention relates to gripper mechanism therewith and with hub 2, is a shaft 5 which is
for receiving and holding successive sheets fed adapted to turn independently of the cylinder.
to the impression or feed cylinder of a press, such,
for example, as an offset press. In such appa
This shaft is employed to transfer operative move
ments to the gripper shaft and ?ngers later to be
ratus, a plurality of ?ngers are carried by the
cylinder and the ?ngers are opened and then
closed upon a sheet placed in register therewith
by the ordinary paper feed of the machine, the
?ngers being released after the printing impres
10 sion is completed on the sheet by rotation of the
feed cylinder.
According to the present invention, the grip
per ?ngers are mounted in such manner as not
only to have a pivotal or rocking action with re
spect to the cylinder, but a bodily movement co
axially with the cylinder in an arcuate path to
ward and from the point at which the sheet is
received by the cylinder in position to be grasped
by the ?ngers. Such movement is a positive
independently of the rotation of the
20 cylinder.
A characteristic of my construction is that the
gripper ?ngers are held against bodily move
ment, preparatory to gripping the paper, during
25 a movement of the cylinder relative to the grip
Secured to hub 2 of the cylinder I by means of
screws 6, is a plate ‘I, which turns with the cyl
inder. Adjacent plate ‘I and keyed to shaft 5 is
a gear segment 8 which meshes with an actuating
gear segment 9, the latter being carried by a pivot 10
stud I0 carried by plate ‘I.
Below gear segment 9 is a stop arm I I, the lat
ter being pivoted at I2 upon frame member 3.
Arm II carries a roller I3 in register with a cam
I4 mounted for rotation in the direction of the 15
arrow, Fig. 1. Stop arm II also carries a roller
I5 adapted to be engaged by a ?nger 93: carried
by gear segment 9.
Clamped on shaft 5 by means of strap I6 and
bolts II is a bracket arm I8 disposed within the
open gap A-—B of the cylinder. It will be under
stood that a second bracket arm I8 will be dis
posed at the opposite end of the cylinder, and
intermediate arms, in order that they may ade
per mechanism and when the cylinder moves a
quately support the gripper shaft,‘ gripper bar 25
and associated gripper mechanism. Arm I8 is
predetermined distance the ?ngers will meet the
provided with a boss Him to receive gripper shaft
sheet and hold the same against a gripper bar
whereupon the gripper mechanism will move in
30 unison with the cylinder.
The invention will be described with reference
to the accompanying drawings, in which
Fig. 1 is an end elevation of a printing cylinder
and a supporting frame therefor together with
35 the gripper mechanism of the present invention,
certain parts being broken away and others be
I9, the latter carrying the usual grippers 20, and
secured to arm I8 by screws 24 is gripper bar 2I.
Gripper shaft I9 projects beyond the end of boss 30
I8x and has secured thereto a lever 22 provided
with a contact roller 23 engaging the undersurface
of a cam 25 secured to end plate In: by screws 26.
The formation of cam 25 is best shown in the
dotted line views Figs. 1 and 2.
Pivotally mounted on a shaft 21 disposed above
ing shown in dotted lines, the gripper being
the cylinder and in register with gripper bar 2|
shown open.
is a shouldered latching arm 28, the function of
Fig. 2 is a diagrammatic view similar to Fig. 1,
40 showing the gripper elements in closed position.
Fig. 3 is a fragmentary front elevation of a
printing cylinder, its supporting frame and grip
per mechanism of the present invention.
Fig. 4 is a perspective view of the printing cyl
45 inder and certain elements of the gripper mech
In the drawings I have shown a printing cyl
inder at I, the latter having an open gap from the
line A to the line B. One end only of the cylinder
is shown, to wit, that end carrying the operating
mechanism for the gripper ?ngers. The cylinder
is provided with the usual end plates Ix, Izcx, the
latter having a hub 2 rotatably mounted in ?xed
frame member 3, hub 2 directly engaging a bush
55 ing 4.
Extending through the cylinder coaxially
which will be hereinafter set forth.
In the operation of the device, the cylinder
I will travel at a constant rate of speed in a coun
ter-clockwise direction, as indicated by the arrow
a. In the normal position of the gripper mech
anism, gripper bar ZI will lie against the edge of
cylinder gap B and the cylinder therefore will
bodily move the arm and associated gripper mech
anism in the direction of the arrow. This follows
because gear segment 9 is engaged by a heavy
spring 29 which turns the segment and therefore
gear segment 8 with shaft 5 and bracket arm I8
until gripper bar 2I engages the edge of the cyl
inder gap at B. As the cylinder rotates in the
direction of the arrow a, ?nger 9.1: will meet roller
stud 23 and gear segment 9 will be given a reverse
rotation which will result in the moving of arm 55
l8 and the associated gripper mechanism to the
position shown in Fig. 1. In such movement of
’ the gripper mechanism, roller 23 and lever 22 will
ride up upon a high point of cam 25 and thus to
the position of Figs. 1 and 4. By such move
ment, lever 22 will turn gripper shaft 19 to raise
the gripper ?ngers 20 above bar 2|, the parts
assuming the position of Figs. 1 and 4. At this
a depending counterbalance l6x of suitable form.
It will be understood that various modi?cations
may be made in the form and arrangement of
the elements illustrated in the drawings without
departing from the spirit of the invention.
What I claim and desire to secure by Letters
Patent, is as follows:—
1. In gripper mechanism for cylinder printing
presses, a cylinder having a peripheral gap there
10 shoulder 28a: of latching arm 28 and the arm will , in bounded by cylinder walls at the opposite edges 10
move downward to the position shown in Figs;‘ "of the gap, means for rotating the cylinder, a
point, the gripper bar 2| will have passed the
1 and 4, the spring 29 acting upon segment gear
9 to hold the arm in such position until the cyle
inder moves ahead to bring the edge B of the cyl
15 inder gap into contact with the gripper bar. In
the meanwhile, a sheet of paper is passed by the
feeding means (not shown)’ along plate 30, en
tering the space between ‘the gripper ?ngersv 20
and gripper bar 2| and in the movement of the
20 cylinder, as just described, the high point of cam
26 will be carried away from 23 and shaft l9 will
shaftmovable independently of the cylinder, car
rying means on said shaft and disposed in said
gap, gripper ?ngers pivotally mounted on said
carrying means, a'cam device carried by the cyl 15
inder and adapted to rock said ?ngers, a gear on
said shaft, ‘and a second gear in mesh therewith
and having a contact ?nger, a spring acting upon
the second gear and normally actuating said gears
to hold the carrying means against a cylinder
wall at one edge of the gap, contact means in
be partially rotated by its usual spring (not
the path of said ?nger for rotating said second
shown) to carry the gripper ?ngers down upon
the paper holding the same against the gripper
25 bar 2!. Thus, when the edge B of the cylinder
gap meets the gripper bar, the sheet of paper
gear against the tension of the spring, and means
for releasing said contact means from engage
?rmly held by the gripper mechanism will be
carried with the cylinder. This is permitted by
the actuating mechanism for gear segment 9 as
30 will be seen by reference to Fig. 1. In that ?gure,
the gripper bar has just been engaged by latch
ing arm 28 and the low point of cam I4 is ap
proaching roller l3 immediately thereafter re
leasing the stop arm “ solthat it falls to the
35 position shown in Fig. 2 enabling the bodily move
ment of gear segment 9 and its associated parts
ment by said ?nger.
2. In gripper mechanism for cylinder printing
presses, a cylinder having a peripheral gap there
in bounded by cylinder walls at the opposite edges
of the gap, means forrotating the cylinder, a
shaft movable independently of the cylinder, car 30
rying means on said shaft and disposedjin said‘
gap, gripper ?ngers pivotally mountedon said
carrying means, a cam device carried by the cyl-.
inder and adapted to rock said ?ngers, a gear
on said shaft, and a second gear in mesh there 35
with, a spring acting upon said gears to normally
with the cylinder. When the printing impres
hold the carrying means in such position that
sion upon the paper has been completed, cam M
the gripper ?ngers are held adjacent one cyl
inder wall at an edge of the gap, means for rotat
will have raised stop arm ll, placing roller stud
I5 in register with ?nger 91:. As the cylinder
ing said gears against the tension of the spring 40
~ rotates, ?nger 9:1: engages roller stud l5 and gear
during a partial rotation of the cylinder, a con
segment 9 is swung to the position of Fig. 1, releas
ing the paper. Thus, after the printing impres-_
tact member on said second cam and means mov
sion the paper is released at an adequate interval
before a new sheet is moved to position between
- the gripper bar and gripper ?ngers.
For ease and smoothness of operation, arms l8
may be counterbalanced, as, for example, by con
tinuing the metal of strap I6 downwardly to form
able into and out of register with said contact
member whereby the second gear during partial
rotation of the cylinder is given a rotational
movement against the tension of said spring and
thereafter is released.
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