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Патент USA US2119754

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June 7,‘ 1938.
J. SINKOYITZ ET AL '
2,119,754
CYLINDER GRIPPER AND SHOO-FLY ACTUATING MECHANISM
’
Filed April 1, 1957
s Sheets-Sheet 1
INVENTOR.
Mum? ‘
'
BY
~
THE/I? ATTORNEYS
,
June 7, 1938.
J. SINKOVITZ ET AL
2,119,754
CYLINDER GRIPPE'R AND SHOO-FLY AQTUATING MECHANISM
Filed.Apri1 1, 1937
'
3 Sheets-Sheet 2
THE/R‘
ATTORNEYS
June 7, 1938.
2,119,754
J. SINKOVITZ El‘ AL
‘ CYLINDER GRIPPER AND SHOO
FLY ACTUATING- MECHANISM‘
Filed April 1, 1937
'
a Sheets-Sheet 3
%N.
THE/F? ATTORNEYS
2,119,754
Patented June 7, 1938
UNITED STATES
PATENT oFFmi:
2,119,754
I
'
.
CYLINDER-GRIPPER ANDl SHOO-FLY ACTU
ATING MECHANISM
Joseph Sinkovitz and August A. Saul, Pittsburgh,
Pa., assignors to» Miller Printing Machinery
00., Pittsburgh, Pa.,
a corporation of Penn
sylvania
Application April 1, 1937, Serial No. 134,344 '
12 Claims.
Our invention pertains to mechanism for ac
tuating the cylinder grippers and the shoo-?ies
of cylinder printing presses, especially (though
not necessarily) cylinder printing presses of the
5 two-color type, employing two cylinders.
In presses of the characterjust mentioned, the
impression cylinders normally occupy a depressed
position in which the sheets thereon are con
tacted by printing forms carried by the type-bed.
10 But means are provided whereby either of the
cylinders can be slightly raised when for some
reason (such as the absence of a sheet thereon)
it is not desirable that such cylinder occupy its
normal depressed position. This raising of either
15 or both of the cylinders can be effected either
automatically or manually by any one of a num
ber of instrumentalities well known in the art.
_ Cylinder grippers retain the sheet on each cyl
inder during oneof the two revolutions which the
20 cylinder makes for each cycle of the press, and.
must be opened, after such revolution, to permit
the delivery of the sheet from the cylinder.
Shoo-?ies are also provided, for the purpose of
raising the leading edge of the sheet from the
25 cylinder when the grippers are opened, thereby
to facilitate delivery of- the sheet. These shoo
flies are actuated after each printing revolution
of the cylinder substantially coincidently with
the opening of the grippers. A common mode
30 of thus opening the grippers and raising the shoo
?ies is by means of what we may term a ?xed
cam (since it is ?xed during the period ofits
actual operation) with which engage rollers as
sociated with the gripper mechanism and the
35 shoo-fly mechanism, respectively, these mech
(Cl. 101—409)
afterwards being delivered from the second cylin-t ‘I
der. In this case the second cylinder would run
continuously, throughout the printing ‘ of the
whole job; and it is preferable thatit run all the
time in its raised, position, though this has here
tofore involved the disadvantage that has been
mentioned.
'
'
_
,'
'j
'
With the foregoingv in view, it is a main object
of our invention to improve upon mechanisms for
actuating the cylinder grippers and shod-?ies. n,
We attain this object by providing means where
by the grippers and shoo-?ies are actuated with
equal precision and smoothness regardless of
whether the cylinder be in its normal or its raised
position. Other objects of the invention will ap
pear from the following ‘speci?cation and the‘
claims annexed thereto.
‘
We have described, by way of example, in the
following speci?cation, and shown ' in the ac
companying drawings, one form of actuating 2.0
mechanism in which our invention may be em
bodied. However, the invention may be embodied
in other forms,’and changes made- in the par
ticular form described and shown, ‘without ex
ceeding the scope thereof, as de?ned in the ap
pended claims.
In the drawings:
'
»
-
'
v Fig. 1 is a partially diagrammatic view, with
portions in section, of a two-color cylinder print
ing press showing part of the means for actuating ,
the cylinder-grippers and shoo-?ies. '
Fig. 2 is an end View of the.secondcylinden-the
cylinder being. shown as raised- and ‘in the posi
tion of-rotation wherein the grippers are about
to. open and the shoo-?ies to raise. In this View»
anisms being carried by the rotating cylinder.
a ?xed cam, carried by. the press-frame, is shown
The ?xed cam is designed and located, of
course, for the most e?icient operation when the
in section.
cylinder is in its depressed, printing position.
When the cylinder is raised, even though the rais
ing be slight, the rollers of the gripper and shoo
fly mechanism will not make their engagement
with the ?xed cam with entire precision and
smoothness, with the result that, although the
45 grippers and Shoo-flies will still perform their
'
'
Fig. 3 is a view similar to Fig.» 2 but with the
cylinder shown as in its depressed, operating,
position and in a position of rotation where the 491?
grippers have just opened and the Shoo-?ies have
raised.
,
.
I
Fig. 4 is a front View of the gripper-shaft lever
and the coupling associated therewith.
>
Fig. 5 is an end view of the same, as seen-from
required functions, their operation will be noisy
the line V—V'of Fig. 4.
and accompanied by undue wear. This may be
markedly detrimental,-particularly in the case
of Fig. 4.
~
Fig. 6, is a plan, as seen from the line VI—.VI
Referring now to Fig. 1, 0. represents the ?rst '
of a two-color press. In such a press it fre
50 quently becomes desirable to print a single color.
cylinder of a two-color press, to which the sheets.
In that case the sheet would usually be printed
are fed from a feed-board or the like. In the
on the ?rst cylinder, then carried to the second
cylinder by means of the usual transfer cylinder,
and then allowed to travel round with the sec
normal operation of the press, the sheets are
55
ond cylinder, without any printing being done,
4,5, 7
7
printed on the cylinder a and then forwarded,by
a transfer cylinder b,to the second cylinder, des»
ignatedc, where they. are printed the second
50
2
2,119,754
time. The sheets are then delivered onto a suit
ment by the abutment 31 of the gripper-shaft
able delivery apparatus, which may include strip
lever.
per ?ngers d.
In the normal position of the parts, the grippers
It will be suf?cient to consider the second cylin
are held closed, by the action of the spring l1,
der, 0. This consists of substantially solid ends and the lug 36 of the coupling is thus held in a
l0 and l I, connected by a segmental printing por
leftward position in which it engages the abut
tion [2 along one edge of which are arranged ment 31 of the gripper-shaft lever (Fig. 4). The
gripper pads I 3, all of well known construction. locations of the pin 40 and of the arm 39 on the
A shaft 14 rockably journaled between the ends ' gripper shaft lever are such that, in these cir
10 I l and I2 carries a plurality of spaced tumbler cumstances, the arm 39 will engage the pin. Thus 10
grippers l5 which cooperate with the pads l3, to the gripper-shaft lever is held in a position such
retain the sheet, in the usual way.
From the
gripper shaft l4 there extends an arm l6 upon
which bears a spring device ll, of common con
15 struction, which maintains the grippers l5 closed
against their pads l3 except when the grippers
are opened to receive a sheet (by well-known
means not of importance here) or opened to de
liver a sheet by the mechanisms hereinafter to
20
be
described.
.
r
-
-
Spaced along thecylinder, between the grip
cam e in correct relation with the cam-surfaces >
24 and 21. Whether the roller 25 be depressed by
the cam-surface 24 or the roller 28 be raised by
the cam-surface 21, the effect will be the same.
The abutment 31 on the gripper-shaft lever will
be moved contra-clockwise, pressing against the
lug 36 on the coupling 35 and moving it so as to
rock the gripper shaft in a direction to open the
grippers,—the arm 39, of course, moving away,
pers l5, are shoo-flies l8. They are mounted
on a shaft l9 and normally maintained in their
from the pin 40.
depressed position (in which their tips lie be
gripper shaft by hand when it is desired to open
the grippers for purposes of make-ready and the 25
25 neath the edge of the sheet on the cylinder) by a
spring 2|]. An actuating arm 2| extends from the
shaft l9 for engagement by a push rod '22 when
the shoo-?ies are to be actuated to raise them
away from the cylinder.
30
In Figs. 2 and 3 there is shown the ?xed cam,
designated e, which performs the function of
opening the grippers and raising the shoo-?ies on
the occasion of the delivery of the sheet from the
35 cylinder. ‘This cam is mounted on the printing
press frame adjacent the end ll of the cylinder,
and, as is usual with such cams, is movable, axial
ly of the cylinder, in such manner as to be in op
erative position during the second, or non-print
40 ing, rotation of the cylinder. but out of oper
ative position during the ?rst, or printing, rota
tion of the cylinder. Since we are here concerned
with the non-printing rotation of the cylinder,
during which the cam is in a stationary operative
45 position, the cam e is appropriately referred to as
a ?xed cam.
For opening the grippers when the cylinder is
in its raised position (Fig. 2), the cam e is formed
with an extension 23 having a face 24 for en
50 gagement by a cam roll 25 carried by an arm 26
of a gripper-shaft lever 34, rotatably mounted
on the gripper shaft I4. For opening the grip
pers when the cylinder isdepressed (Fig. 3), the
cam is formed with a face 21, complementaryto
55 the face 24, for engagement by a cam roll 28 car
_
Suitable means are provided for rocking the
like. In that case the grippers are opened more
widely than they are for the delivery of a sheet
from the cylinder. When the delivery shaft is
thus manually rocked nearly through the desired
distance, the lug 36 of the coupling 35 comes into
engagement with the abutment 3B of the gripper
shaft lever, whereafter such lever participates in
the rocking movement. Thus the abutment 31
moves towards the extension 4| of the pin 40 until
it engages such extension and prevents further
rocking movement. At this time the grippers will
have reached their fully open position. When the
gripper shaft is manually rocked backward, to
close the grippers, the parts will return to the
normal position shown in Fig. 4.
40'
One result of the foregoing construction, in
cluding the limiting of the possible positions of
the gripper-shaft lever, is that if the grippers
should mistakenly be left open when the press is
started, or there should occur some other acci
dent in operation such as would materially dis~
place the gripper-shaft lever if it were ?xedly
secured to the gripper shaft, the gripper-shaft
lever will nevertheless enter the race between the
surfaces 24 and 21 of the cam 6, so that no wreck
would occur.
When the cylinder is raised, the roll 25, in en
gaging the face 24, causes the gripper shaft to be‘
rocked contra-clockwise, whereby the grippers
are opened, in the manner that has been de- _
ried by an arm 29 which extends from the grip-_
per-shaft lever 34 in a direction oppositeto the
arm 26. When the cam roll 25 engages the face
scribed, against the action of the spring device
I1. When the cylinder is depressed, the roll 28.
in engaging the face 21, likewise causes the grip
24, the cam roll 28 clears the face 21, and vice
per shaft to be rocked contra-clockwise, with a
like result. Each of the cam-faces 24 and 2'! can,
of course, be formed with precision; so that the
60 Versa.
In order that the gripper-shaft lever, though
rotatably mounted on the gripper shaft, may ac
tuate the latter, the following provisions are
made (Figs. 4-6).
A coupling '35 is. ?xedly
65 mounted on the gripper shaft adjacent the grip
per-shaft lever, and. is formed with a lug 36.
The gripper-shaft lever is formed with abut
ments 3'! and 38 (which are relatively widely sep
arated) for engagement by one side or the other
70 of ‘the lug 3,6 of the coupling. The gripper-shaft
lever is further formed with an arm 39, disposed
in a plane axially beyond the abutments 31 and
38, which is adapted'to engage the ?attened'face
75
that its cam rollers 25 and 28 will arrive at the
operation of opening the grippers is performed
correctly and with smoothness, regardless of
whether the cylinder is raised or depressed.
For raising the shoo-?ies, the cam e is formed
with a downwardly extending, approximately
vertical leg 30 formed with a face 3| for engage
ment by a cam roll 32 carried by one arm of a
bell-crank lever 33. The other arm of the bell
crank lever is connected with the push-rod 22 de
of a pin 40 mounted in the cylinder-end I I. The.
scribed above. The con?guration of the face 3|
is such that when it is engaged by the roll 32, the
push-rod will be moved upward, to engage against
the actuating arm 2| described above and thereby
pin 40 is formed with an. extension 4|, for engage
raise the shoo-?ies.
2,119,754
Because of the approximately verticalv disposi
tion of thevcam-face 3|, substantially coinciding
with the plane of movement of the cylinder in
being raised or depressed, the difference in the
actuating of the shoe-?ies, occasioned by the
raising of the cylinder, is so slight as to be neg-li
gible.
-
By our invention, therefore, we have provided
a means for actuating the cylinder grippers and
10 the shoo-?ies of a cylinder printing press which
will operate with equal precision and smoothness
regardless of whether the cylinder occupies its
raised or its depressed position.‘ This is of mate;
rial importance, and especially so» where the
15 cylinder is the second cylinder of a two-color
press.
7
Having thus fully described our said invention,
what we claim as new, and desire to secure by
Letters Patent, is:
'
20
1. In a cylinder printing press, the combina
tion with an impression cylinder, a printing mem
ber normally cooperating therewith, means for
moving said cylinder into and out of cooperative
relation with said printing member, and a cylin
25 der gripper, of a cam for opening said gripper to
permit delivery of a sheet, said cam having a sur
face for operation when said cylinder is in co
operative position with respect to said printing
member and a second surface for operation when
30 said cylinder is out of cooperative position with
respect to said printing member.
2. The combination with a press cylinder
adapted to move toward and away from a bed
reciprocating adjacent the cylinder, said cylin
35 der having grippers carried on a common shaft
journaled in the cylinder, of a lever on said shaft,
and relatively ?xed cam means for tilting said
lever to rock said shaft, said means having a sur
face fortilting the lever when the cylinder is in
40 one position relative to the bed, and another
surface for tilting the lever when the cylinder is
in another position.
3. The combination with a press cylinder
adapted to move toward and away from a bed re
45
ciprocating adjacent the cylinder, said cylinder
having grippers carried on a common shaft jour
naled in the cylinder, of a lever on said shaft,
and relatively ?xed cam means for tilting said
lever to rock said shaft, said means having a sur
50 face for tilting the lever when the cylinder is in
one position relative to- the bed and another sur
face for tilting the lever when the cylinder is in
another position, said surfaces being spaced apart
radially of the cylinder.
55
3-.
position relative to the bed ‘and another surface
for tilting the lever when the cylinder is in an-v
other position, said‘ lever being rotatable on said
shaft,rand means secured to the shaft adapted to
be actuated on» angular movement of said lever.
6'. The combination with a press cylinder
adapted to move toward and away from a bed re
ciprocating adjacent the cylinder, said cylinder
having grippers carried on a common shaft jour
naled in the cylinder, of a lever on said shaft 10?
having arms extending‘ in substantially opposite
directions radially of the shaft, a relatively ?xed‘
interior cam'adapted to cooperate withone end 7 v
of the lever when the cylinder is in one position,
and a relatively ?xed exterior cam adapted’ to 15
cooperate with the other end of the lever when
the cylinder is in another position. ‘
'
'7. The combination with a press cylinder
adapted to move toward and away from a bed re
ciprocating adjacent the cylinder, said cylinder
tilting the lever when the cylinder is in one‘posi 25
tion relative to the bed and another surface for
tilting the lever when the cylinder is in another
position, said lever being rotatable'on said shaft,
means secured to the shaft'adapted to be actu
ated on angular movement of I said lever, and
means for limiting rotation of said lever, the
shaft being free for continued rotation after en
gagement of said limiting means by said lever.
8. The combination with a press cylinder
35
adapted to move toward and away from a bed re
ciprocating adjacent the cylinder, said cylinder
having grippers carried on a common shaft jour
naled in the cylinder, of a lever on said shaft,‘
relatively ?xed cam means for tilting said lever
to rock said shaft, said means having a surface 40
for tilting the lever when the cylinder is in one
position relative to the bed and another surface
for tilting the lever when the cylinder is in an
other position, said lever being rotatable on said
shaft, means secured to the shaft adapted to- be 45
actuated on angular movement of said lever,
means normally urging said shaft in one direc
tion, and means limiting movement of the lever
in the other direction whereby said lever is always
maintained in cooperative'relation with said cam 50
means, said shaft being free for continued rota
tion after the lever has engaged said limiting
means.
9. The combination with a press cylinder
adapted to move toward and away from a bed 55
4. The combination with a press cylinder
adapted to move toward and away from a bed re
reciprocating adjacent the cylinder, said cylinder
ciprocating adjacent the cylinder, said cylinder
having grippers carried on a common shaft jour
naled in the cylinder, of a lever pivoted inter
having grippers carried on a common shaft jour
naled in the cylinder, of a lever on said shaft, and
60 relatively ?xed cam means for tilting said lever to
rock said shaft, said means having a surface for
tilting the lever when the cylinder is in one posi
tion relative to the bed and another surface for
tilting the lever when the cylinder is in another
65 position, said lever being rotatable on said shaft,
and means whereby angular movement of the
lever effects rotation of the shaft.
5. The combination with a press cylinder
adapted to move toward and away from a bed
70 reciprocating adjacent the cylinder, said cylin
der having grippers carried on a common shaft
journaled in the cylinder, of a lever on said shaft,
relatively ?xed cam means for tilting said lever
to rock said shaft, said means having a surface
76 for tilting the lever when the cylinder is in one
20
having grippers carried on a common shaft jour
naled in the cylinder, of a lever on said shaft,
relatively ?xed cam means for tilting said lever to
rock said shaft, said means having a surface for
mediate its ends on said shaft, relatively fixed
cam means having separate surfaces adapted to 60
cooperate respectively with the ‘ends of the lever
when said cylinder is in different positions, a
coupling secured to said shaft, and means where
by angular movement of the lever turns the cou
pling and shaft.
‘
65
10. The combination with a press cylinder
adapted to move toward and away from a type
bed cooperating therewith, of shoe ?ies secured to
a common shaft journale'd in the cylinder, and
means for actuating said shaft including a rela 70
tively ?xed cam having a face extending in the
general direction of movement of the cylinder‘
whereby the'rotation of said shaft caused by said
cam is substantially the same regardless of the
position of the cylinder.
75
4
2,119,754
11. The combination with a press cylinder
adapted to move toward and away from a type
12. The combination with a press cylinder
adapted to move toward and away from a type
bed cooperating therewith, of shoo ?ies secured
bed cooperating therewith, of shoo ?ies secured
to a common shaft journaled in the cylinder, and
means for actuating ‘said shaft including a rela
tively ?xed cam, an actuating arm on said shaft,
a push rod engaging said arm and lever adapted
to engage said cam for actuating said rod, said
to a common shaft journaled in they cylinder,
means normally tending to turn said shaft in one
direction but permitting manual rotation of the
shaft in the other direction, and means for auto
matically rotating said shaft in said other direc
tion on rotation of said cylinder including a rela
tively ?xed cam having a face extending in the 10
general direction of movement of the cylinder
lever being so‘ spaced circumferentially of the cyl
10 inder from said shaft that at the instant the
lever engages the cam, the movement of the lever
caused by the rotation of the cylinder is in sub
whereby the rotation of said shaft caused by said
stantially the same general direction as the
movement of the cylinder toward and from the
cam is substantially the same regardless of the
15' bed whereby the resulting operation of the shoo
?ies is substantially the same regardless of the
actual position of the cylinder relative to the bed.
position of the cylinder.
15
JOSEPH SINKOVITZ.
AUGUST A. SAUL.
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