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Патент USA US3079158

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Feb. 26, 1963
Filed Jan. l2, 1960
3 Sheets-Sheet 1
_.@E_ _,_
Feb. 26, 1963
Filed Jan. l2, 1960
3 Sheets-Sheet 2
Feb. 26, 1963
Filed Jan. l2, 1960
3 Sheets-Sheet 3
Patented Feb. 26, 1953
David M. Gilman, Brookline, Mass. (% Graphic Equipl
ment Co., 22 Simmons St., Boston 29, Mass.)
Fiied Jan. 12, 1960, Ser. No. 1,974
'7 Claims. (Cl. 271-27)
porting arm 26 is rigidly secured at its lower end to the
shaft 27 which in turn is pivotally secured in the brack
ets 23 (FIGS. 1 and 4). The brackets 28 are in turn
secured to the longitudinal braces 2 and 4 at the rear
end thereof. A clamp arm 29 is pivotally secured at
the upper end of the support arm 26 with the clamp arm
29 extending normally therefrom as illustrated in FIG.
10. The support arm 26 is preferably pivotally secured
The present invention relates to a take-off mechanism
adapted to remove individual sheets from a press. More
particularly the present invention relates to a device for 10 to the shaft 27 at the left side thereof as viewed in FIG.
1. As viewed in FIG. l, ciamp arm 29 extends to the
successive removal of sheets of paper or the like from
left from the support arm 26, so that it projects beyond
a press at selected uniform time intervals and in a con
tinuous fashion.
This invention has particular utility in removing sheets
the side longitudinal brace 2 thereby for purposes of
clearance during the operation of the device. The clamp
in continuous and successive fashion from a printing or 15 arm 29 projects through the upper end of the support
arm 26 to which it is pivotally secured and has rigidly
silk screen processing machine wherein ' is important
secured to one end the lever 36. This lever 30, which on
to be able to synchronize the removal of the sheets with
rotation will cause a corresponding rotation of the clamp
the `operation of the printing or silk screen process
arm 29, is in turn pivotally interlinked with the guide
The present invention is designed to remove successive 20 arm 3l. The guide arm 31 is a tubular shaft closed at
its ends extending substantially the length of the support
sheets of material from a press and redeposit them on a
arm 25. At its lower end it is pivotally interlinked with
conveyor, dryer or other apparatus in a precisely oriented
the L-shaped lever 33 having vertical leg 34 and hori
fashion at uniform time intervals which intervals if de
zontal leg 35. The upper end of the leg 34 is pivotally
sired, may be varied. A further object of this invention
is to provide a feed mechanism for feeding successive 25 secured by suitable means to the lower end of the guide
arm 3l, while the outer end of leg 35 is pivotally secured
sheets of material in which the elements of the mech
the longitudinal brace 2 through a block 37 (FIG. l).
anism engaging the sheet are compact and capable of
Rigidly secured to the leg 35 close to the block 37 and
being inserted and quickly removed from confined or
immediately in front of the support arm 26 is the engag
restricted spaces on the press.
member 40. This engaging member 40 is adapted to
It is also an object ofthe present invention to provide 30
be moved forwardly as the support arm 26 moves for
a take-off mechanism of simple and inexpensive construc
wardly and engages it. Secured to the clamp arm 29
tion which is etiicient, reliable, and unlikely to require
and extending transversely thereto are two or more rigid
repair or attention.
air tubes 46 having suction cups 41 at their free ends.
These and other objects and advantages of the present
invention will be more clearly understood when con 35 These rigid tubes may be secured in a marmer as illus
rated in FIG. 1l by a bolt and clamp mechanism 5l and
sidered in conjunction with the accompanying drawings
S2 wherein the bolt 51 projects through the clamp 52 se
in which:
curing the tube 46 to the arm 29. The other ends of the
FIG. l is a perspective view of the invention with por~
»rigid air tubes 46 are connected to the ñexible air tubes
tions shown broken-away for clarity,
FIG. 2 is a' detail of a valve mechanism,
40 55, 56 in turn secured to and interconnected with the in
terior of the tubular guide arm 3i. This guide arm 31
FIG. 3 is a cross section of the valve mechanism of
which forms a continuous nonleaking air passage is con
FIG. 2 taken along the line 3_3 of FIG. 2,
FIG. 4 is a side elevational view of the invention with ’ nected through a flexible tube 56 to a valve mechanism
generally designated at 59. On movement of the engag
the pick-up arms in their forward or pick-up position.
FIG. 5 is a fragmentary detail of the pick-up arm and 45 ing member 40, the L-shaped lever will pivot (as viewed
in FIG. 5) in a clockwise direction, to the position shown
associated mechanism, '
in dotted outline, against the tension of spring 49 there
v FIG. 6 is a perspective detail of the locking mech
by causing the lever 3G to move about its axis in a clock
anism whereby the operating drive is disassociated from
wise direction (as viewed in FIG. 5). This in turn causes
the press,
lowering of the cups 41 with positive force as the sup
FIGS. 7, 8 and 9 are plan views of the locking mech
port arm 26 moves to its forwardmost position. This
anism in various positions of operation, and,
. FIGS. 10 and 11 are perspective fragmentary details
of the invention.
downward movement of the cups 41 causes a positive en
gagement with the upper surface of the table Ztl or papers
placed upon it. The helical spring 49 interconnects the
In FIGS. l and 4 there is illustrated a supporting frame
upper portion of leg 34 with a tongue 45 rigidly con
1 preferably formed of angle members. The frame l 55 nected
to and projecting inwardly from the longitudinal
includes parallel longitudinal braces 2 and 4 to which is
thereby tensioning the L-shaped leg 33 in a coun
secured the parallel vertical legs 6 and 8. The braces 2
terclockwise direction as viewed in FIG. 5.
and 4 are rigidly interconnected by a series of cross
The valve mechanism 59 (FIGS. 2 and 3) is designed
braces 10, 12 and 14. The frame is further supported
and rígidiiied by a pair of side braces 16 and 18 on either 60 to cause a suction in the oups ¿il as the support arm 26
moves from a rear to a forward position. The vacuum
side. Other supporting members may be used as desired.
is maintained on the cups 41 when the Support arm has
A working surface or table 20 (FIG. 4) is rigidly se
reached its forward position and the sheet material is
cured by means of a transverse angle member 21 at the
picked up and carried by cups 41 from the table 20.
upper ends of the legs 6 and 8. This table 2t) is the
printing table on which the impression of the sheet ma 65 As the pick-up mechanism 25 moves toward its rearmost
position, the vacuum is released and the sheets fall from
terial may take place. The legs 6 and 8, for purposes
the oups 41. This valve mechanism 59 is supported on a
of this specification shall be defined as at »the forward
plate or other suitable means 6l) and provides a housing
end of the device and the cross brace 12 at the rear end.
6l. with a pair of transverse passages 63 and 64 (FIG. 3).
A pick-up mechanism 25 best illustrated in FlGS. 1, 4l
and particularly FIG. 5 is operatively supported by the 70 Inner end of passage 63 is connected to air tube 56, while
inner end of passage 64 is connected toa suitable vac
supporting frame `1. In this pick-up mechanism a sup
uum pump (not shown) through a ilexible air tube 65.
The other ends of the passages 63 and 64 open onto the
same side of the housing 61 and are operatively connected
or `disconnected by pivotal movement of the T-sh'aped
valve controlr arm 67. -This valve control arm 67 has
afmain stem 68 with a recess 69 (FIG. 3) adapted to op
eratively interconnect the open ends of the passages 63
and 64. This stem is pivotally mounted» at its lower end
(not shown) .to-permit» movement of the -stem 68 from
»97rspaced `one-above the other are secured to theplate
91 in a position to engage the hook arm 94. _An adjustable
stop 98 is secured above stop 96 at a position more re
mote from the arm 94. This stop is provided with a
spring stop 99. This stop is adapted to engage the upper
end of lever. arm 93. A ñange »100. projects downwardly
from the side edge of plate 91 in a plane normal to the
’ plate 91. >The hook is adapted’to engage a pin 101 (FIG.
the position -shownfin `FIG. 3 towardthe leftand back
again. vIn'the position'ill-ustrated in FIG.~ 3 thev two pas
sages 63 and 64 are- interconnected permitting a vacuum
pump to draw air'through the two passages and conse
quently through the cups 41, thereby causing a'suction
or pick-upîaction> -at the cups'41. vAs the stem 68 is moved
toward the left~ orirearwardly,'the passage 63 is opened
thereby cutting ofi the vacuum on- the cupsVV 41. The sup
port arm 26 is provided with apin778 projecting outwardly
and» adapted to operatively interengage the cross member
71~rigidly secured to the stem 68.4 This cross member
7) projecting normally from the free Yend’of the follower
arm 78. This hook 95 is normally free of follower arm
78. .AI-Iowever, when it is- desirable to disengageth'e pick
up mechanism from’the press and'wh‘en the follower arm
has‘ïreached its' uppermost position, the lever 93 is moved
counterclockwise and then’clockwise in a sequencesuc
cessivelyiìllustrated‘in FIGS. 7, 8 andv 9. In this sequence
the hook arm 94, on counterclockwise rotation of the
arm, 93 first engages stopï96. This causes-the hook armv
94 to »pivotabout the stop 96=andcause the hook 95 -to
engage the pin 101. On 'subsequent clockwise movement,
the pin 101 is lifted upwardly against the lower vedge of
71 has a centrally located depression 76 bordered bya 20 flange 100 as illustrated in FIG. 9 thereby disengaging the
pair of high spots `74 and -75 which' taper outwardly in
roller 80 from cam 77.
end sections having'end surfaces 72 and 73. ~Since the
What'is claimed is:
axis of the stem 68 is positioned above the axis about
1. A device adapted to individually 'remove sheets lfrom
Vwhich'pin'70 rotates, there is an» intermittent engagement
a table comprising a table, a vacuum operated pick-up
and disengagement ofthe' pin 70`with the cross member 25 system having suction cup'means, Aa lever system adapted
71. Asl the support arm 26 moves forward from its'rear
to move said 'suction cup means îto and from the vupper
mostpositiomthe pin 70 rides'over the surface 72'and
surface ofsaid >table -and to Vpivot said suction cup means
contacts high pointr'IS'cïausing stemf68<to move forward.
toward and away from ‘said upper surface, said »lever
This positions the stemy 68 in the 'position‘as illustrated'i‘n
system including an elongated guide arm and elongated
FIG. 3, thereby causingïa constant'vacuum at the cups
support arm, means pivotally supporting said arms below
41. As the stem 70 moves continuously forward, the vac
the level of said table, with 'the upper ends of said arms
uum is maintained. This vacuum is maintained'whii'e>
extending upwardly above said 'tableysaid means 'supporti
the» cups' 41 move to their' foremost `position and start back.
ing saidguide arm adapted to’move >said guidearm length
The passage 63 opens and the-vacuum‘onï the cupstis re
wise, va lever .pivotally interconnecting the upper ’ends
leasedon the rearward stroke of the support arms when' 35 of said arms, means securing said suction cup means to'
pin 70 rides over the surface -73and contacts high point
said lever for movement’therewith, ’said suction cup -means
74»thereby releasing sheets of paper which had previously
positioned to 'contact said table surface on pivotal move'
been held by the cups 41. -The support arm'26 is‘no'w
ment of Vsaid arms toward Vsaid table, said means support
ready for the reset cycle.
ing said guide arm for lengthwise movement having a»
The pick-up mechanism v25`is cyclically " actuated" by rva 40 portion interengaged with >said support arms whereby
drive mechanism powered by a motor not shown through>
pivotal movement of said support arm will 'cause said
gearbox 7S (FIG. 4). The gear boxî is connected through
means supporting 'said guide arm to move said Vguide arm
suitable coupling «76 to the'shaft `ofa cam 77. A fol
lengthwise,` means> for moving ‘said arms toward and away
lowerarm 78 is pivotally 'mounted »at one end on the
from said table, and vacuum means for actuating said
supporting shaft 79. The supporting shaft 79‘is in turn
vacuum pickup system whereby said vacuum is Aapplied to
suitably Ysecured to the lframe in journals. ’The follower
said- suction vcup means as said suction cup means move
arm 78 has aïroller 80 adapted to follow'the cam and
from said table.
therebycausethefollower arm 78 torise and drop with
2. A device as set forth in claim 1' wherein said means
the cam 77. The free end'of thearm 78 is interconnected:
supporting said guide arm includes a lower lever pivotally
to the T-shape'd lever 81 througha link 82. The linkv 82 50 interen'gaged at one end with and' supporting said guide
is pivotally interengaged at its vends, with óne end con
arm, said lower lever having a projecting member integral
nected to the arm 78 and the other 'to oneïend ofthe
therewith with said projecting member positioned between'
cross member of the T-shaped lever 81. This T-shaped
said support arm and said table and closely adjacent said
lever'Slis inverted fand is securedrtot'afshaft 85 »extending
support arm, whereby movement of Isaid support arm
transverse to the frame 1. `Shaft 85 `is suitably journalled
toward said table will engage said projecting member and
for rotation -in brackets 86. The T-shaped lever is rigidly
cause said lower lever to pivot upwardly thereby moving
connected to this shaft at the’ other’end 87 of the cross
said guide arm relative to said support arm.
member. The upper end o'f-stem 88 pivotally'eng'a'ge's one
3. A device as set forth in claim l wherein said vacuum
end ofthe elongated lever 89 in vturn secured at its other
meansv includes air passages interconnecting 'said suction
end to the arm '26 >preferably between the center of arm 60 cup means and an air valve, said air valve having ports
26 and the lower end vof arm 26. A helical spring 90
connected to said air passages a'nd a- port adapted to be
has one end connected to the varm 26 'above the lever 89
connected to a vacuum source, means for selectively inter
andthe other connected to the leg `6 ofthe frame V1 there
by tensioning the arm 26 forwardly.
The take-off mechanism may be operatively disengaged
from the press by means of a locking device 90a which
disengages the follower 'arm 78 from the cam 77. This
locking device 90a ís illustrated in FIGS. 6 to 9. The
connecting and'individually opening said parts, and means
65 operatively interengagin’g said last mentioned means and
said lever system whereby said ports >will be selectively
interconnected and opened over selected portions of the
movement of said arms.
4. -A device as set forth in claim l wherein said 'means
locking device 90a comprises a plate 91 through which
moving said arms comprises a cam and lever linkage
is journalled a »pin 92. A suitable pull rod (not shown) 70 for
system interengaging’said cam and support arm for move)having an engaging element at one end engages pin 1110.
mentvof -said 'support arm from said table and a spring
Longitudinal .movement of this -rod pivots arm 93 about
means for movement of said arm Vtoward 'said -table.
pin 92. This lever arm 93 pivotally supports the hcokï
E5. A device forY cyclical removal of successive’ sheetsy
arm 94 which 'depends >from the »upper end of lever arm'
93 and terminates in a hook 95. A pair of stops 96 and 75 from a printing press comprising a supporting frame,Y a
pick-up mechanism including a support arm pivotally
mounted at one end to said supporting frame, a clamp
arm pivotally supported at the upper end of said support
arm and extending normally therefrom, an elongated
guide arm extending generally lengthwise of said support
means for pivoting said support arm in a cyclical move
ment to and from said forward and rear positions.
6. A device as set forth in claim 4 wherein said lever
linkage system includes a follower arm adapted to contact
and follow said cam and means including a hook arm
arm, means pivotally interlinking the upper end of said
adapted to engage said follower arm and disengage it
guide arm to said clamp arm for axially rotating said
from contact with said cam for operatively disengaging
clamp arm, an L-shaped lever pivotally secured at one
said device.
end to said supporting frame with the other end pivotally
7. A device as set forth in claim 6 wherein said means
interlinked with the lower end of said guide arm, an 10 including
a hook arm includes pivoting means supporting
engaging member fixed to said L-shaped lever and adapted
arm and a leverage system operatively engaging
to be moveably engaged by and on pivotal movement of
said hook arm for pivotal movement about said pivoting
said support arm whereby said L-shaped lever will be
means whereby said hook arm may be selectively engaged
pivoted, said guide arm moves generally lengthwise and
or disengaged with said follower arm.
said clamp arm thereby axially rotated on movement of 15
said support arm, spring means tensioning said L~shaped
References Cited in the file of this patent
lever toward a preselected position, a rigid air tube having
a suction cup pick-up element at one end extending
normal to and fixed to said clamp arm whereby said
Bulluck _____________ __ Apr. 24, 1900
suction cup will describe an arc on rotation of said 20
clamp arm, means for applying a vacuum through said
suction cup including a vacuum pump, an air tube inter
connected between said rigid air tube and a valve mecha
nism, said valve mechanism adapted to maintain said
vacuum on said suction cup as said support arm pivots
from a forward position to a rearward position, and
Anderson et al. ________ __ Feb. 8,
Roden ________________ _- Jan. 8,
Albrecht _____________ _.. Feb. 22,
Leach ______________ __. Apr. 19,
Spiess ______________ ..._ June 29,
Plastaras ______________ .__ Jan. 5,
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