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Патент USA US3095819

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July 2, 1963'
HP. GAMMETER ETAL
3,095,809
MASTER STRIPPING MEANS FOR ROTARY PRINTING MACHINES
Filed Sept. 26, 1960
Fl
l
(3
7 Sheets-Sheet 1
//Aas
a;
INVENTORS.
BY
HARRY F. GAMMETER
FRANCIS R. PATALON
RUDOLPH J. KATTERLE
ATTORNEYS
July 2, 1963
H. F. GAMMETER ETAL
3,095,809
MASTER STRIPPING MEANS FOR ROTARY PRINTING MACHINES
Filed Sept. 26, 1960
7 Sheets-Sheet 2
INVENTORS.
HARRY F. GAMMETER
FRANCIS R.PATALON
RUDOLPH J. KATTERLE
mw¢7J4WM/M
_
ATTORNEYS
July 2, 1963
H. F. GAMMETER ETAL
3,095,809
MASTER STRIPPING MEANS FOR ROTARY PRINTING MACHINES
Filed Sept. 26, 1960
7 Sheets-Sheet 5
INVENTORS.
BY
HARRY F. GAMMETER
FRANCiS R. PATALON
RUDOLPH J. KATTERLE
5%m/?m/
J;
TO R N EYS
July 2, 1963
H. F. GAMMETER ETAL
3,095,809
MASTER STRIPPING MEANS FOR ROTARY PRINTING MACHINES
Filed Sept. 26, 1960
7 Sheets-Sheet 4
swim.
/\N-.1
INVENTORS.
HARRY F. GAMMETER
FRANCIS R. PATALON
BY RUDOLPH J KATTlEéRiE
ATTORNEYS
July 2, 1963
H. F. GAMMETER ETAL
3,095,809
MASTER STRIPPING MEANS FOR ROTARY PRINTING MACHINES
Filed Sept. 26, 1960
7 Sheets-Sheet 5
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INVENTORS.
HARRY F. GAMMETER
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July 2, 1963
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H. F. GAMMETER ETAL
3,095,309
MASTER STRIPPING MEANS FOR ROTARY PRINTING MACHINES
Filed Sept. 26, 1960
7 Sheets-Sheet 6
HARRY F.
MMETER
FR
CIS R. PATALON
WBY
RU LPH J. M
KAT'IZRLE
¢Z/d'¢€/\7//0;7
M
ihiATTORNEYS
July 2, 1963
H. F. GAMMETER ETAL
3,095,809
MASTER STRIPPING MEANS FOR ROTARY PRINTING MACHINES
Filed Sept. 26, 1960
'7 Sheets-Sheet 7
INVENTORS.
HARR
FRANg/llg
R. PATALON
. GAMMETER
BY RUDOLPH J .
TTERLE
KA
ATTORNEYS
United States Patent 0 ice
1
3,095,809
Patented July 2, 1963
2
MASTER STRIPPING MEANS FOR ROTARY
by way of illustration, show the preferred embodiment of
the present invention and the principle thereof and what
PRINTING MACHINES
is now considered to be the best mode contemplated for
3,095,809
_
Harry F. Gammeter, Cleveland Heights, Francis R.
Patalon, Willowick, and Rudolph J. Katterle, East
Cleveland, Ohio, assignors to Addressograph-lvlulti
applying that principle. Other embodiments of the inven
5
tion embodying the same or equivalent principles may be
used and structural changes may be made as desired by'
those skilled in the art without departing from the present
graph Corporation, Cleveland, Ohio, a corporation of
Delaware
Filed Sept. 26, 1960, Ser. No. 58,399
8 Claims. (Cl. 191-217)
This invention relates to a rotary oif-set printing ma
chine.
invention.
»
In the drawings:
10
FIG. 1 is a perspective view from the top front of a
machine constructed in accordance with the present in
vention and wherein the master and blanket cylinders
In a rotary off-set printing machine, that is, one oper
have been removed;
ating on the lithographic principle, a master plate is pre
FIG. 2 is a perspective view at the bottom rear of the
pared bearing an ink receptive form of the image to be 15 machine;
.duplicated, and this master is clamped in place on the
FIG. 3 is a side elevation of the machine;
so-called master or printing cylinder. The image is selec
FIG. 4 is a side sectional view of the machine taken
tively faced with ink on the basis of the lithographic
on the line ¢l—4 of FIG. 5;
principle, and the ink is oil-set in reverse image form on
FIG. 5 is va top plan view of the machine taken on the
to the receptive surface of a so-called blanket on a blanket 20 line 5-5 of FIG. 3;
cylinder. The blanket cylinder is coupled with 'an im
FIG. 6 is a sectional view on an enlarged scale taken
pression cylinder, ‘and the sheets to be printed are fed be
substantially on the line 6-6 of FIG. 5;
tween the blanket and the impression cylinder to receive
FIG. 7 is a detail plan view ofthe shaft in the machine
the image in direct reading form from the blanket in
which supports the stripper ?ngers;
successive cycles of the machine.
25
FIG. 7A is a fragmentary sectional view of an end
It is advantageous to be able to run the machine under
portion of the shaft shown in FIG. 7; and
circumstances where the master will ‘be automatically re
FIGS. 8 and 9 are sectional views, each on an enlarged
moved or stripped from the master cylinder, after a pre
scale, and taken on the lines 8-8 and 9——9 of FIG. 5.
determined number of machine cycles, by opening the
As introductory to the arrangement of parts in the
clamps which hold the master in place. This is especi~
machine of this invention, attention is directed ?rst to
ally so in those instances where it is desired to use a
FIGS. 1, 4 and 5 which best show that a master cylinder
particular master for no more than the recommended or
10, on which the ‘duplicating lithographic master is
desired number of impressions, and the primary object
mounted, is arranged on a shaft 10A for rotation between
of the present invention is to enable this to be accom
a pair of sturdy rear side plates ll and 12. These plates
plished in a rotary off-set printing machine by parts that 35 are part of the main frame of the machine which also
can be easily arranged in virtually any given machine of
includes a pair of forward side plates 11A and 12A. The
this class wherein the cylinders referred to are disposed
plates 11 and 12 are pivotally mounted on a sha?t 13,
between supporting side plates. Speci?cally, it is an ob
FIG. 4, supported ‘by the front side plates 11A and 12A,
ject of the present invention to open the master clamp
and the frame plates are rigidly interconnected by various
by actuating a cam that is conveniently located adjacent
tie bars TB as will be evident in FIG. 4.
the inside face of a side plate tot-the machine, and to
The master or plate cylinder 10‘ is gear driven and is
actuate the cam by a train of links including a releasing
arranged to rotate in contact with a blanket cylinder
latch that are substantially in the plane of the cam. The
14 which is supported on a shaft 14A in turn supported
releasing latch is under control of a solenoid or equivalent
by
the side plates 11A and 12A. The lblanket cylinder
element that is to be energized after the predetermined
is
located
above an impression cylinder 15 and de?nes
number of machine cycles or impressions has ‘been at—
a lbight therewith as will be evident in FIG. 4. The im~
tained.
pression cylinder includes a shaft 15A supported for rota
Another object of the present invention is to so ‘asso
tion between the side plates 11A and 12A. The image
cia-te stripper elements with the master clamp releasing
on the master plate carried on cylinder 16' is inked, and
cam that these ‘will be active only at the time the cam 50
the ink representations are transferred to the blanket
is actuated and ‘as an incident thereto to peel the released
cylinder
and in turn are transferred thence to the sheet
master from the master cylinder. ‘Objects of the inven
to be printed that is fed between the blanket and the im
tion related to this are to actively pull the stripped
pression cylinder.
master away from the master cylinder in an ejector oper
The clamping mechanism with which the present in
ation and into a collecting tray, and todo this in such a 55
vention is particularly concerned is mounted in an axially
way that the master will not be damaged to the extent
extending gap or recess formed in the periphery of the
that it cannot be reused; and to so construct and arrange
master
cylinder ~10, FIG. 6. This mechanism is de
the related ejector mechanism as to be removably mounted
scribed in more detail in Patent No. 2,813,482 and in
as a separate ejector attachment or unit on virtually any
60 eludes an elongated channel-like ?ange and support 21
given machine of the aforesaid character.
of U-shape, the web of which is secured by bolts to one
Other objects of the present invention are to accurately
wall 23 of the gap in the master cylinder. The upper
control the action of the clamp releasing cam and the
one of the ?anges or legs 25 of the support 21 extends
stripper elements; to accurately guide the stripped master
axially {of the cylinder and lies a short distance below the
to the ejector mechanism so that there is assurance that 65 periphery thereof, and resultantly forms an anvil against
the master being ejected will not become jammed in the
which one end of a master printing plate or sheet may
be clamped. A plurality of plungers or pins 26 are
machine; to assure a ?rm and positive ejecting action on
mounted in spaced openings formed in the ?ange 25 for
the used master; and to accurately time and control the
reciprocation in a direction normal to the ?anges.
operation of the stripper elements.
A thin disc-like clamping member 30 is secured to
Other and further objects of the present invention will 70
the upper end of each plunger :or pin 26, FIGS. 5 and 6.
be apparent from the following description and claims
and are illustrated in the accompanying drawings which,
These clamping members lie above the upper ?ange 25
and are aligned in a row which extends axially of the
3,095,809
4
3
drum. The clamping members 39 are individually biased
toward the aforesaid anvil by springs 31, FIG. 6, which
encircle the respective pins 26 and are interposed between
the upper flange 25 of the support and respective split
retaining rings mounted in annular recesses formed in the
in a clockwise or non-printing direction from the posi
tion indicated in FIG. 4 produces a positive engagement
between the ‘free end of pawl 47 and any one of several
stepped cam surfaces 46A, FIG. 4, afforded by the cam
plate 46, and all of the clamping members 30 are shifted
pins 26‘.
to their open position to release or receive a master sheet.
Such rotation can be effected manually, and tends to
When one end of a thin, ?exible lithographic printing
swing the pawl 47 counterclockwise about its pivot 48,
plate is positioned between the clamping members or
but this movement is restrain-ed by the stop pin 46, and
discs ‘30 and the anvil, with its adjacent edge abutting the
pins 26, the force of the springs 31 is sufficient to retain 10 the result is a counterclockwise movement of the pawl
carrying arm 42A, the shaft 42 to which it is secured,
the end of the printing plate ?rmly affixed to the master
the arm 43, and the brackets 41. This movement of the
cylinder. However, such retaining force may be sup
‘brackets 41 causes the rod 4%), carried thereby, to lift the
plemented by the engagement of the plate by a series of
pins 26, raising their respective clamping members 30
relatively small sharp metallic spurs 32 carried by a plate
out of contact with the anvil 25. In this position a
32F which is interposed between the support 21 and the
previously clamped sheet is released for manual removal,
wall 23‘. One such spur extends upward adjacent each
and the clamping members 3t? are in position to receive
clamping disc 30 so that a master sheet or plate will be
another master sheet.
forced by the discs 30 into engagement with the spurs.
To position a master sheet, the master cylinder 110 is
The opposite or trailing end of the printing plate may be
20 positioned as above described to open the clamps 30.
One end of a master sheet is placed on the anvil surface
The present invention is particularly concerned with
25 with the adjacent edge thereof abutting the plungers
the clamping members 36 vfor the leading end of the
26 and the left band edge engaging a side guide as de
printing plate and the mechanism ‘for operating the same.
scribed in Patent No. 2,813,482. This positions the master
The clamping members 31), heretofore described, are
both circumferentially and axially relative to the cyl
moved to their sheet receiving or releasing position, by
unsecured.
'
'
a common operating rod or bar 49 which bears on lower
extensions of the plungers 26, ‘FIG. 6, and this bar is
actuated by a cam as will be described in detail.
Thus, the rod 40 extends axially of the master cylin
der within the gap and underlies the inner or lower
ends of the plungers 26. The ends ‘of the rod 40 are
mounted in respective brackets 41 which are pivotally
mounted on a shaft 42 rotatably journaled in the end
plates of the master cylinder. A pair of arms 43 is se
inder. The operator holds the sheet in such position
and slowly rotates the cylinder to move the rod 40 away
from the plungers 26 and permit the spring 31 to draw
the clamping members 30‘ toward the anvil 25 and clamp
the sheet positioned therebetween. The latter movement
of the cylinder may be in either direction, although the
construction is such that it is more convenient to use a
counterclockwise or printing movement. In either case
the pawl 47 quickly disengages the cam 46 and the parts
cured to the shaft 42 within the gap of the master cylin
return to their normal positions. Cam 46, it will be
der and adjacent respective brackets 41 so as to move
noted, includes a plurality of cam rises as 46A, and the
with the shaft when the latter is rocked in a manner to
reason for this is explained in Patent No. 2,813,482.
Under and in accordance with the present invention
be explained.
The arms 43 are adapted to transmit counterclockwise
release of the clamps 30* is effected by means operable
movement of the shaft 42, as viewed in EEG. 6, to the 40 automatically after a predetermined number of prints or
brackets 41 and also retain the brackets in position axial
machine cycles. This is accomplished by providing arm
ly on such shaft. To this end, each ‘bracket 41 has an
42A (with a cam follower 66, FIG. 4, which is adapted
inturned lip 41L which overlies its respective arm 43
to engage master clamp releasing means in the form of
and carries ‘an adjusting screw 415 which engages such
a rise 70R, FIG. 4, on a cam 70 when the rise 70R is
45
arm to transmit counterclockwise movement of the shaft
in the dotted line position indicated in FIG. 4 which rep
42 to the brackets 41.
resents the position to which the cam .70 is moved or
Each bracket 41 carries a pin 41F‘, FIGS. 5 and 6,
which extends freely through an enlarged opening 43A
in its respective arm 43. An enlarged washer is pro
vided on the outer end of each such pin, and a plurality ‘
of discs 45 encircle the pin 411’ between the Washer and
the related arm 43.
At least one of these discs com
prises a spring-like member which exerts an axial pres
sure on the arm 43 to thereby frictionally clutch the arm
and bracket together ‘for movement as a unit about the
axis of the shaft 42, and yet permit adjustment of the
position of the arm relative to the bracket by the adjust
ing screw 418.
A cam plate 46, FIGS. 1 and 4, which is one element
for controlling the position of the clamping members 30
by actuation of the shaft 42,, is ?xed to the inside face of
the frame member 11 of the printing machine. This
cam vis positioned in the path of a pawl 47 pivotally
released after completion of the predetermined number
of machine cycles, as will be described in detail below.
Cam 70 is pivotally located at the inside face of the frame
plate 11 as shown in FIG. 1 and is in a predetermined
plane. Cam 7i) is under control of a latch 73, FIGS. 1
and 4, substantially in the plane aforesaid. Latch 73‘ is
normally unreleased, but the latch 73 in turn is under
control of an arm 75 which'is located at the inside of
frame plate 11A. Arm 75 is connected to the armature
of a solenoid (not shown) which is associated with a
counting mechanism which constitutes no part of the
present invention.
The cam 70 is spring-biased to its normal or ineffective
position shown in FIG. 4 as will be described in more
detail hereinafter, and intermediate links are interposed
between the cam 70 and the latch 73‘ substantially in the
plane thereof in such a manner that the cam 70 will be
mounted as at 48 on an arm 42A secured to one end
forced to its dotted line position shown in FIG. 4 when
of the shaft 42 which extends axially beyond the end 65 the predetermined number of counts has been registered
of the cylinder 10 which lies adjacent the cam 46.
A spring 478 normally holds the pawl 47 against a stop
42X carried by the arm 42A.
When the cylinder 10 is
rotated in a counterclockwise or printing direction, as
viewed in FIG. 4, the pawl 47 engages the can 46 and
is freely rocked about its pivot without any effect. Thus,
during rotation of the printing cylinder in ‘a printing di
rection cam 46 has no effect upon the master sheet clamp
ing mechanism.
_
On the other hand, rotation of the, master cylinder
by the counting mechanism. Thus, the latch and cam
parts and connecting links which control automatic mas
ter plate release can be conveniently located inside a
frame of an existing machine, such as that disclosed in
the aforesaid patent, without any signi?cant alterations.
The count controlled arm 75 is generally vertically ex
tended and is formed with a flange 75A, FIG. 4, at the
upper end thereof. The ?ange 75A bears against a down
wardly directed projection 73}? formed on the releasing
5
3,095,809
6
latch 73, and this condition is in part maintained by a
.
mid-section has a crescent-shaped notch that embraces
the lower half of shaft 86. IBolts 121 secure the bell
crank to the clamp and join both tightly to the shaft 86,
and these bolts permit the bell crank to be rotatably .ad
justed relative to shaft 86.
When the counting solenoid energizes, it exerts a down
ward pull ‘on arm 75, and the latch 73 is released from
spring 77 which is anchored at the lower end on a pin
75P ?xed adjacent the lower end of the arm 75, and the
upper end of the spring 77 is anchored on a pin 79 which
is a?ixed to the inside face of the frame plate ‘11A of the
machine adjacent which the arm 75 is located.
Latch 73 is pivotally mounted on a supporting stud 81,
FIGS. 1 and 4, which is atiixed to the inside face of frame
plate 11A of the machine, and a spring 82, anchored at
its lower end to a frame plate mounting pin 83 and 10
anchored at its upper end to a pin 84 on the latch 73, is
effective to ‘bias the latch 73 downwardly as viewed in
the extension 85E of the rocker arm or bell crank. When
the cam rise 117R passes off follower 116 on ‘arm 115,
the bell crank 85 is then free to‘ pivot counterclockwise
as viewed in FIG. 4 to the extent permitted by its control
cam 117, and this motion is transmitted through links 92
FIG. 4 so that ?rm contact is established between the
and 95 to the clamp releasing cam 70' causing the latter to
latch projection 73F and the ?ange 75A of arm 75.
be moved to its ‘active position indicated by the dotted
As will be evident in FIG. 4, the latch 73 is generally 15 lines in FIG. 4. This action takes place against the re
crescent-shaped, and the pivot 81 is located near one end
sistance of spring 110. The rise 70R is, therefore, dis
of the crescent. The opposite end of the crescent-shaped
posed in the path of the clamp release follower 60, FIG.
latch 73 is ‘formed with a notch '73N in which is normally
4, and when this follower engages the rise 70R, the clamps
located one corner of a lug 85E provided at the lower end
30 are opened as an incident to rocking of shaft 42,
of a relatively large bell crank 85. This bell crank is car
thereby releasing the leading edge of the plate on the
ried on a shaft 86 ‘which projects inward from the ad
master cylinder. The master thus released is stripped
jacent side plate 11A of the machine. Shaft 86 is ar
from the master cylinder and is guided and ejected into a
ranged for limited rocking movement, for a purpose to be
receiving tray 120, FIG. 4, in a manner now to be de
scribed.
explained, when the latch 73 is released. The bell crank
is substantially in the plane of the cam 70, and the arm 25
The master is stripped and initially guided away from
of the bell crank 85 opposite the arm which carries the
the master cylinder toward the tray 120‘ by three uni
projection 85B is provided with a pin 88. The upper end
formly spaced stripper ?ngers ‘r130, FIGS. 4, 8 and 9
of a spring 911 is :a?ixed to the pin 88, and the lower
which are in the form of relatively narrow blades. These
end of spring 90 is anchored on a pin 91 which projects
?ngers are normally held spaced away ‘from the surface
inward from the side plate 11A of the machine which 30 of the master cylinder in a non-stripping or retracted
supports the stud 85 representing the fulcrum of the bell
position as will be described below. Each is provided
crank 85. Thus, the spring 91} is effective normally to
with an arcuate forward edge 130A ‘which is curved com
plemental to the radius of curvature of the master cylin
bias the bell crank 85 in a counterclockwise direction as
viewed in FIG. 4.
der. Each stripper ?nger includes an arcuate guide sur
The latch 73 and the bell crank 85, it will be appre 35 cface 13113 at the back thereof which serves to guide the
stripped master in the direction of the receiving tray, and
ciated, are substantially in the same plane, and this plane
the two surfaces 130A and 13GB merge into a relatively
is also occupied by a relatively small bell crank 92 which
narrow point 131W which serves to afford the primary
serves as an intermediate link between the count con
stripping action.
trolled latch mechanism and the releasing cam 70. Thus,
The stripper ?ngers 1311 are arranged in spaced relation
as shown in FIGS. 1 and 4, the bell crank 92 is free to 40
on a support shaft 132 which extends between frame
swing on a pivot stud 93 which is supported by the frame
plates 11 ‘and 12, and in this connection it should be
plate which supports the elements 81 and as. The [bell
pointed out that these frame plates at the left and right
cranks are interconnected pivotally by a link plate 95
sides of the machine serve as mountings for the master
Winch is pivotally connected at the opposite ends there
cylinder bearings, other supporting members, the stub
of to the adjacent ends of the bell cranks 85 and 92 re
1115 on which the releasing clamp 71} is pivoted and other
spectively by pins 96 and ‘97. The end cf the bell crank
parts hereinafter described.
_
92 which is adjacent the end 79E of the clamp releasing
As was mentioned, the stripper ?ngers 1311 are carried
cam 7 0 is extended thereunder to engage and lift this cam.
on a supporting shaft 132, and to this end each stripper
The releasing cam 70 is in the form of a relatively long
blade at the lower edge thereof is formed with a half
arm as will be apparent from FIG. 4 and is pivoted, in
round opening 135, FIG. 8. This opening is shaped com
.termediate its ends, on a stud 105 which projects inward
plemental to ‘a corresponding groove 132G, FIGS. 7 and
ly from the side plate 1J1 of the machine. Thus, the cam
7A, ‘formed at an appropriate location along the length of
arm 71) projects quite far to the left of the pivot 105 as
stripper ?ngers supporting shaft 132. The stripper shaft
will be apparent in FIG. 4 and is provided with a pin 166
132 is formed with ?at sunfaces 132F at the location of
at the left hand end 7 9L thereof. One end of a spring v‘110
each groove 1326 and on the side thereof opposite the
is anchored to this pin, and the opposite or upper end of
groove. Each such ?at surface is shaped to receive a
the spring 111} is anchored on a lug 112L that is bent
corresponding projection 140A, FIG. 8, provided on a
inwardly from one end of a plate :112 which is supported
retainer
plate 140. Thus, there is a retainer plate :140
at the inside face of frame plate 11. The plate 1112 is
provided with a guide arm 113, FIG. 4, which serves as 60 for each stripper ?nger 130, and each stripper ?nger is
a guiding support for cam 79.
‘Finally, in connection with control ‘over cam 70, it
should be noted that the shaft 86, which carries the bell
crank 85 projects outward of the adjacent frame plate .as
shown in FIG. 5 and an arm 1.15 is a?’ixed thereto at one
end. The opposite end of arm 115 is provided with a
‘follower 115 which ‘is disposed in the path of a cam ‘117,
FIG. 3, that rotates with the blanket cylinder. The cam
is adjustable through a supporting eccentric blushing 118,
FIG. 3, and in each cycle of the machine the rise 117R
of cam 117 nudges the follower 116. It will also be noted,
FIG. 4, that the bell crank 85 is secured to shaft 86 by a
clamp 120. The clamp plate 121} bears against the flat
provided with a pair of studs 142, FIG. 8, having ‘thread
ed portions of reduced diameter adapted to project through
corresponding openings in the related clamp plate 140.
Nuts 140N, FIG. 8, are threaded on to the projecting
65 ends of the studs 142, and these enable the ?at face of the
projection 140A of the clamp 140 to be drawn tight
against the flat surface 13'2F on the stripper shaft and
thereby ladjustably secure each stripper to the support
shaft 132.
[As shown in FIG. 7lA, each end of the stripper shaft
is recessed inward for a substantial distance, and/a coil
spring 146 is mounted in an innermost pocket 147 of the
stripper shaft, this pocket being of su?icient depth and
of reduced diameter to serve as a guide for the related
bottom of a notch in shaft ‘86 and the bell crank 85 at its 75 spring 1146. A plunger 148 is. disposed at the outermost
8,095,809
7
end of the recess at each end of the stripper support shaft
132, ‘and its free outer end is formed with stud 1453A
which projects outwardly beyond the related terminal
end of the stripper shaft 132. One end of the coil spring
146 bears against the opposite end 1483 of the plunger
148 to exert an outwardly directed force on the plunger
148.
8
effective to prevent the stripper shaft follower 170 from
following the contour of the stripper shaft control cam
‘171. Therefore, when cam 76 is released, conditions are
established as an incident thereto which enable the strip
per ‘?ngers 130 to be effective.
When the master clamps 34} are released, the stripper
?ngers 131} are effective on the leading edge of the master
at a point somewhat below the bight between the sur
face of the master cylinder and the surface of a lower
Each plunger ‘148 is provided :with a pin 15%} which is
disposed in a slot ‘151 at the end of the stripper shaft 13?...
The plunger is ?rst disposed in the pocket at the end of 10 ink form roller 1%, FIG. 3, and during the course of
initial stripping, the released master travels along the
the stripper shaft, and thereafter the pin 159 is press ?tted
‘arcuate guide surfaces 136d?» of the stripper ?ngers. In
in place to serve ‘as a stop limiting the extent to which
this connection, it is to be pointed out that the ?ange
the spring 146 presses the plunger 143 outwardly.
25, FIG. 6, is notched at three intervals 25G, FIG. 5,
The projecting studs 148A of each plunger are adapted
to fit in supporting elements that are provided on the in 15 inward from the leading edge, and this enable the stripper
?ngers 130, in effect to get under the leading edge of the
side faces of the frame plates 11 and 12.
>
released master. Additionally, the radial wall 23, FIG.
[1‘he stripper shaft 132 is in the nature of a rock shaft
6, of the master cylinder just rearward of the ?ange 25
and is so controlled that the stripper ?ngers 13% are
is sloped at 238 so that the stripper ?ngers will not
moved into stripping position when the releasing earn 7 '
has been shifted to its active position. However, so long 20 jam against the master cylinder during stripping action.
as the clamp releasing cam is inactive, means are effective
to hold the stripper ?ngers away from the master cylin
der. To this end, the stripper shaft has a bell crank 16%),
FIGS. 6 and 7, a?ixed to one end thereof. Gne arm 160A
thereof is connected to the lower end of ‘a spring 161
which has the upper end anchored to a pin 162 provided
on a mounting plate 163 which in turn is secured to the
inside face of the frame plate 12 at the side of the rn-a—
chine opposite the, clamp releasing cam 79.
'
The other arm 16GB of the bell crank 16% carries a
follower roller 170, and this follower is disposed im
mediately opposite a stripper ?nger control cam 171,
FIGS. 5 and 6. This cam is in the form of a relatively
large disc having a diameter slightly smaller than the mas
ter cylinder and is ?xed to the master cylinder shaft to ,
rotate therewith at the end of the master cylinder op
posite the cam 70 as shown in FIG. 5. The cam 171 is
‘
As mentioned above, the stripped master is to be ac
curately guided into a receiving tray, and this action
occurs at a point below the lower ink form roller 190
which is frictionally driven.
At this time, roller 190
and a like upper roller 1% are moved slightly ‘away from
the master cylinder, as will be explained, and feed means
are effective in order to. pull the stripped master away
from the master cylinder. In accomplishing this, an
auxiliary stripper and ejector unit 260, FIGS. 2 to 4,
is removably mounted in the machine and is supported
primarily by the side plates 11 and 12.
Thus, a pair of mounting brackets as 291, FIG. 3, are
secured to the lower edges of the auxiliary side plates as
Hand 12. The separable attachment 2% is constructed
to include a pair of side platesas 203 and 204, FIGS. 3
and 4, and these are rigidly connected by a pair of
transverse tie bars 2% and 267, FIG. 4. Each of the
side plates 293 ‘and 204 includes lower edges 208 that
are disposed below the lower edges of the side plates
formed with a depression 171D, FIG. 6, and the relation
ship is such that when the follower 1'70 is free to move
into the depression 171D, this is accompanied by clock 4.0 11 and 12 of the machine as will be evident in FIGS. 3
and 4, and each such side plates 203 and 204 includes
wise motion of the shaft 132, FIG. 6, and inward move
upper surfaces 216‘ which, when the unit 200 is mounted
ment of the stripper ?ngers toward the master cylinder
in the machine, extend upward between the side plates
for a time duration su?icient to enable the stripper ?ngers
11 and 12.
to strip the released master from the master cylinder.
In releasably connecting the ejecting unit 230 to the
This is but a small portion of the 360° cycle of cam 171
machine, resort is bad to a pair of manually operable
as will be evident from the con?guration of cam 171
latch elements in the form of pawls 215. Each pawl
shown in FIG. 5, such that the stripper ?ngers are inward
for a brief time only and are thereafter moved in a
return direction once the cam depression 171D has been
moved past the follower 170.
The bell crank 160 and its follower 170* are normally
held in an inactive or retracted position, and this is
achieved by relating the action of the ‘bell crank 168 to
the action of the clamp releasing cam 70. Thus, a release
element in the form of an arm 175, FIGS. 6 and 7, is
a?ixed to the end of the tripper shaft 132 opposite the bell
crank 160 so as to lie adjacent cam 76.
The release
arm 175 is provided with a rearwardly extending ?ange
176, and a stud 177, which has an end projecting free of
the ?ange 176, is anchored therein.
The stud 177, ‘as shown in FIGS. 3 and 4, is normally
engaged by the toe 178 of a ‘releasable stop 180 which is
freely pivoted on the end of the stripper shaft 132 on
which the release arm 175 is a?ixed, and it will be rec
ognized that the spring 161, iFIG. 6, is effective to hold
the stud 177 against the opposed part 178 of the stop 180.
Stop 180 is provided with a pin 182, HG. 4, which is
so located as to engage a shoulder 70A adjacent the rear
portion of the clamp releasing cam 70*, and in this
manner the clamp releasing cam 70 in its ineffective
215 ?ts in a’ groove at the forward end of the related
plate 2%1 and is pivotally supported therein by a pin
‘216, FIG. 3 in the related groove.
Each pawl 215
includes a toe 215T which extends rearward of the pivot
216, and each pawl 215 is notched at 215N, FIG. 3.
The toe 215T of each pawl is en-gageable with a spring
detent in the form of a spring-‘biased ball 218, FIG. 3,
which is mounted in a recess aligned with the groove
in which the pawl 215 is disposed. Thus, the spring
detents are effective to supply a clockwise force to each
pawl 215 as viewed in FIG. 3, and the notches 21SN are
so located as to embrace a stud 2W5, FIG. 32, a?orded
at each end of the transverse tie bar 297 which serves
in part to rigidly connect the side plates 263 and 204.
It will also be noted that each mounting bar or ‘plate
as 2911 is formed with a slot 22%, FIGS. 1 and 3, at the
rear edge thereof, and these slots are so located as to
embrace studs 2865 at the ends of the tie bar 266. Thus,
in disposing the unit 205%} in the machine, the studs on the
tie bar ‘2% are ?rst aligned with the notches 221} and
are ?tted therein. The unit 2% is then pivoted up
wardly to cause the studs on the tie bar 267 to bear against
the sloped or cammed edges 222 at the rear edges of the
position serves the function of holding the stripper ?ngers
pawls 215, pivoting the pawls counterclockwise as viewed
in an inactive position.
However, when the cam 70 moves to its active posi
tion, shoulder 70A thereof is lowered as viewed in FIG.
in FIGS. 3, and motion is continued until the tie bar
studs 21978 are disposed in notched corners LES-1N, FIG.
3, at the forward edges of the mounting plates as 201.
4.
Consequently, the stop ‘180 is released and is not
r The pawls 215 then spring back and have the shoulder
9
3,095,809
elements of the notches 215N thereof effectively engaged
with the complemental stud parts of the tie bar 207‘ to
hold the ejector unit 200 in place.
The unit 200 supports a plurality of guide elements
10
The shaft 248 which carries the rubber rollers 247 is
provided at the ends thereof with hearing supports 260,
FIGS. 2 and 3, which have flat surfaces adapted to ?t in
slots 203$ formed in the side plates 203' and 204. Rela
that are associated with the stripper ?ngers so as to assure
tively strong leaf springs as 261 are tensioned between a
proper guiding relation of the master strip that is being
pair of studs 264 and 265 on each side plate as 203, and
removed from the master cylinder. These guides include
the forward end of each such spring is pressed down
?ngers 230, 'FIG. 4, which have lower arcuate surfaces
wardly to underlie and engage each bearing ‘support as
230A that are shaped complemental to the curved backs
260 to thereby apply a spring retaining force to the shaft
of the stripper ?ngers, and these guide surfaces are spaced
248 which supports the rollers 247.
10
slightly from one another as shown in FIG. 4 to de?ne
Shaft ‘248 is provided with a gear ‘248G, FIGS. 2 and 4,
a guide throat through which passes the master being
which is driven by a gear 255G which is carried by shaft
stripped.
255. Gear 255G is located atone end of shaft 255. A
As shown in FIG. 5, seven such guide members 230
smaller gear 270, FIGS. 2 and 3, is secured to shaft 255
are provided and each is formed at the top edge thereof
at the other end thereof, and this gear is meshed with
15
with a circular notch 230N adapted to ?t in a related
an idler gear 271 which is in turn driven by a constantly
groove 2316, FIG. 8, formed in the guide ?nger support
rotating gear 273, FIG. 3.
shaft 231. Shaft 231, it will be noted in FIG. 5, is sup
Thus, it will be seen that the rollers 246 and 247 serve
ported at the opposite ends thereof in the side plates 203
to impart a withdrawing action to a stripped master, and
and 204.
this master is ejected by such rollers into the inclined
Each guide ?nger 230 is formed with an enlarged open 20 receiving tray 120 which is supported by the auxiliary or
ing 233 intermediate the edges thereof, and this opening
ejector unit 200. The shaft 248 can be readily removed
communicates with an opening 234 somewhat smaller in
to enable the rollers 246 and 247 to be cleaned.
diameter. The opening 234 of smaller diameter is pro
It will be seen from the foregoing that under the pres
portioned to neatly ?t in a groove in a shaft 235 arranged
ent invention, a used master is released and stripped auto
25
parallel to and somewhat below the shaft 231 in the unit
matically from the supporting cylinder in a cyclically
200, and the opening 233 is proportioned to enable shaft
operable off-set printing machine. This can be accom
235 to be inserted therethrough. After such insertion,
plished automatically as an incident to the attainment of
the ?ngers 230 are shifted to produce a complemental ?t
a predetermined number of machine cycles, but of course
between the edges of the openings 234 and the aforesaid
a manual switch can also be provided to enable the sole
grooves in shaft 235. This assembly is then supported on
noid having arm 75 to be energized selectively when
shaft 231 by a pair of spring clips 240, FIGS. 5, 8 and 9,
desired. The entailed mechanism can be conveniently
each having an upper bight 240A adapted to ?t in a re
added to an existing machine, since the operable master
lated relatively wide notch in shaft 231 as will be evident
releasing parts for releasing the master clamps in such a
in FIG. 5. Each clip 240 is formed with a lower bight
machine are sorelated as to be neatly nested substantially
35
240B adapted to ?t in a like notch in shaft 235. The
in the same plane adjacent one of the frame plates of the
parts are so dimensioned that the lower arcuate faces of
machine. The stripping action is positive and a forced
the ?ngers 230 will be spaced slightly from the upper
ejection is used, but even so, stripping and ejection is
face of a lower guide plate 245 to de?ne therewith a nar
accomplished without damaging the master. The ejecting
row passageway into which the stripped master is ad
unit can be separably attached to an existing machine,
40
vanced.
and the arrangement in this unit is such that cleaning of
Thus, a plate 245 of sheet metal is disposed below the
the ejector rollers can be easily accomplished.
lower curved edges of the guide ?ngers 230 as will be
It was mentioned that the form rollers 190i and 191 are
evident in FIG. 8, and this guide is so positioned and
to be moved slightly away from the master cylinder during
related as to cooperate with the ?ngers 230 in directing
stripping of the‘ master. This movement is only about
the stripped master into the bight of related ejector feed 45 0.025 inch, su?’icient to prevent the master vfrom wrapping
rollers 246 and 247 which are rearward of the guides 230.
around the lower form roller while permitting some lfOI'C-—
The guide plate 245 is a removable element and has a
ing action of the lower form roller on the master being
rear portion thereof formed with a plurality of notches
245N as shown in FIG. 5. These notches embrace the
‘rollers 247, and the solid or unnotched portions at the
rear margin of the ‘guide plate 245 overlie a shaft 248
which serves to support and drive the rollers 247 ‘in a
stripped, such forcing action being merely that due to
a slight contact between the tacky form roller and the
tacky image on the master as distinguished from a
‘de?nite squeeze. In any event, the form rollers are to
be raised just prior to the opening of the clamps which
manner to be explained. The guide plate 245 extends
hold the master on the master cylinder._ This can be ac
forwardly therefrom in an upwardly bent direction, and 55 complished automatically in accordance with the disclo
this relationship is maintained by disposing the forward
edge portion of the guide plate ‘245 between pairs of
slightly spaced studs 250 and 251, FIGS. 5 and 8, these
studs being a?ixed to the inside faces of the plates 203'
‘sure in co-pending application, Serial No. 2,546, ?led
January 14, 1960; or, where only manual controls ‘are
"afforded, it can be done by turning the conventional ec
centric mounts for the form rollers just prior to manual
and 204. It will also be noted from FIG. 5 that the 60 ly energizing the solenoid having arm 75 ‘associated there
forward edge of the guide plate 245 is notched at 253
to enable the rear edges of the stripper ?ngers 130 to be
Hence, while a preferred embodiment of the present in
freely active.
vention has been illustrated ‘and described this is capable
\ The guide plate 245 is so curved as to point the master
of variation and modi?cation, and we therefore do not
being stripped into the bight of the related rollers 246
wish to be limited to the precise details set forth, but
and 247 as was mentioned above. There are three
vdesire to avail ourselves of such changes and alterations
rollers 246 as will be noted in FIG. 5, and these are of
as fall within the purview of the following claims.
large diameter and have relatively narrow rims, and each
We claimr
.
c
with.
is a steel roller formed with a boss 246B secured by a set
screw to a supporting shaft 255 which is gear driven as
will be explained.
The related rollers 247 are rubber
rollers, and three of these 247A, 247B, and 2470, FIG. 5,
are directly opposite and engaged with related ones of
the three steel rollers 246. Additional ones of the rollers
247 are arranged between these three rollers‘ 246.
‘
'
11. In an offset-set printing machine wherein a master is
to be held on a rotatable master cylinder by a releasable
clamp, 'oscillatable stripper mean-s adjacent the master
cylinder and normally disposed in a position free of the
path of the master, means to release the clamp, a cam
for controlling the releasing means and normally disposed
in an ineffective position, means for shifting the cam t0
3,095,809
12
11
its effective position to permit shifting of the stripper
?ngers into the path of the unclamped master to strip the
an effective position after a predetermined number of
prints have been made, means under control of said cam
unclamped master from the master cylinder, a cam rotat~
in its effective position to permit shifting of the stripper
means into the path of the unclamped master to strip
the unclamped master ‘from the master cylinder, and a
cam rotatable with the master cylinder to control oscil
lation of the stripper means between the eifective and in
able with the master cylinder and engageable with the
movement of the stripper means to an effective position
when said cam shifts to its eifective position, and a
‘timing cam rotatable with said master cylinder to time
side plates, manually releasable means on said ejector unit
for releasably attaching said unit to the main frame of
the machine, a pair of spaced shafts rotatably supported
?rstnamed follower to control and time oscillation of
the stripper ?ngers between the elfeotive and ine?ective
position thereof, an auxiliary ejector unit removably at
tached to the machine and including guide means having
eifective position thereof.
surfaces opposite related guide surfaces of the stripper
2. In an off-set printing machine wherein a master is
to ‘be held on a rotatable master cylinder by a releasable 10 ?ngers to guide the stripped master away from the master
cylinder, said auxiliary unit including driven feed rollers
clamp, oscillatable stripper means adjacent the master
having :a 1bight in position to receive the leading edge of
cylinder and normally disposed in an ineffective position
the stripped master moving away from the master cylinder,
free of the path of the master, means including a cam
and said auxiliary unit including a receiving tray in posi~
follower to release the clamp, a shiftable cam shiftable to
an eiieotive position to ‘be engaged by said cam follower 15 tion to receive the master advanced by said feed rollers.
5. In a cyclically operable o?-set printing machine
for controlling the releasing means, said cam being nor
wherein a used master is to be stripped from the master
mally in an ineffective position, means for shifting the
cylinder by stripper ?ngers rendered active automatically as
cam to its effective position after a predetermined number
an incident to completion of a predetermined number of
of prints have been made, stripper releasing means under
machine cycles, a main frame supporting said cylinder,
control of said cam in its inelfective position maintaining
an ejector unit including a pair of rigidly interconnected
said stripper means in ineffective position and permitting
operation of the stripper means to be-effective ‘after the 25 between the side plates and respectively provided with
feed rollers, a guide plate for the stripped master and
located on one side of said feed rollers and adapted to
3. In a cyclically operable off-set printing machine
guide the stripped master into the bight thereof, a receiv
wherein a master is to be held on a rotatable master
ing tray on the other side of the feed rollers to receive a
cylinder ‘by ‘a releasable clamp including a spring biased
master ejected by said feed rollers, and spaced guide ?n
plunger, oscillatable stripper means adjacent the master
gers spaced above said guide plate and opposite said strip
cylinder and normally disposed in an ineffective position
per ?ngers and de?ning therewith a narrow passageway
free of the path of the master, clamp releasing means to
leading from the master cylinder to the feed rollers.
exert a clamp opening force on said plunger to release
master has been released.
the clamp and including a cam follower, a cam in a pre
determined plane for controlling the clamp releasing
6. In an oil-set printing machine wherein a used master
35 is to be stripped from the master cylinder automatically
means and normally in an ineffective position free of the
as an incident to completion of a predetermined number
path of the follower, means substantially in said plane for
shifting the cam to its effective position into the path of
of machine cycles, a main frame supporting said cylinder,
an ejector unit including a pair of rigidly interconnected
position to prevent shifting of the stripper means and
a pair of spaced shafts rotatably supported between the
side plates and respectively provided with feed rollers, a
side plates, means on said unit enabling the same to be
said follower after a predetermined number of machine
cycles, means under control of said cam in its ineffective 40 removably attached to the main frame of the machine,
being released upon movement of the cam to its elfec
tive position to permit movement of the stripper means
into the path of the unclamped master to strip the un
clamped master from the master cylinder, a cam rotatable
with the master cylinder‘ to time oscillation of the stripper
means between the effective andine?ective position there
of, guide means cooperable with the stripper means to
guide the stripped masteraway from the master cylinder,
andgdriven feed rollers engageable with the leading por 50
tion of the stripped master to exert a pulling force there~
on incidental to ejecting the stripped master to a receiving
statioiL'
'
4. In a cyclically operable off-set printing machine
wherein a master is to be held on a rotatable master cylin
der by a releasable clamp including a spring biased plunger
disposed in a gap in the master cylinder, oscillat-able strip
guide plate for the stripped master on one side of said
feedrollers and adapted to guide the stripped master into
the bight thereof, a receiving tray on the other side of the
feed rollers to receive a master ejected by said feed rollers,
horizontally spaced guide ?ngers arranged above said
guide plate and de?ning therewith a narrow passageway
leading from the master cylinder to the feed rollers, and
stripper ?ngers adjacent the master cylinder and having
arcuate guide surfaces substantially aligned with said pas
sageway to guide a stripped master accurately thereinto.
7. In an o?-set printing machine wherein a master is
to be held on a rotatable master cylinder by a releasable
clamp, oscillatable stripper means adjacent the master cyl
inder and normally disposed in a position free of the path
of the master, means torrelease the clamp, a cam for con
per ?ngers carried on a rock shatt adjacent the master
trolling the releasing means and normally disposed in an
cylinder and normally disposed in aposition free of the
path of the master, said rock shaft having ?xed thereto
ineffective position, means for shifting the cam to an effec
an arm with a cam follower thereon, spring means effec
been made, means under control of said cam in its effec
tive position after a predetermined number of prints have
tive position to permit shifting of the stripper means into
the path of the unclamped master to strip the unclamped
master cylinder, clamp releasing means to exert a clamp
opening force on said plunger to release the clamp and in 65 master from the master cylinder, and timing means opera
tive in synchronism with rotation of the master cylinder
cluding another cam follower, a cam disposed in a pre
tive on said rock shaft to urge said ?ngersltoward said
determined plane for controlling the clamp releasing
means and normally in an ineffective position free of the
to control oscillation of the stripper means between the
effective and ineifective position thereof.
18. In a cyclically operable o?-set printing machine
path of said followers, means [substantially in said plane
for shifting the cam to its effective position into the path 70 wherein a used master is to be stripped from the master
of said other follower after a predetermined number of
cylinder by stripper ?ngers rendered active automatically
machine cycles, means substantially in said plane enabling
as an incident to completion of a predetermined number
said cam in its ineifective position to apply a force to
of machine cycles, a main frame supporting said cylin
der, an ejector unit including a pair of rigidly intercon
nected side plates, 21 pair of spaced shafts rotatably sup
said rock shaft opposing said spring means and being
disabled from so acting in opposition when said cam is in
3,095,809
13
14
ported between the side plates and respectively provided
References Cited in the ?le of this patent
with feed rollers, a guide plate for the stripped master and
UNITED STATES PATENTS
located on one side of said feed rollers and adapted to
.
guide the stripped master into the bight thereof, a receiv
ing tray 0n the other side of the feed rollers to receive a 5
master ejected by said feed rollers, and spaced guide ?n-
2’212’65'9
2:331:351
Comm)
E:11,1§1rm'1&';t_;1
_____'_::::::
““““““ “ Aug: 27’ 1940
seeley _______________ __ Oct_ 12: 1943
gers spaced above said guide plate and opposite said strip~
2,380,744
Ford ________________ __ July 31, 1945
per ?ngers and de?ning therewith a narrow passageway
2,758,539
Ritzerfeld et a1 ________ __ Aug. 14, 1956
leading from the master cylinder to the feed rollers.
2,935,937
Ro‘ssetto et a1 __________ __ May 10, 1960
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