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Патент USA US2406936

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Sept. '3, ‘19.46.
‘2,406,936
A. B. wooDRuFF
SHEET DELIVERY MECHANISM
Filed June 15, 1945
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A. B..'WOODRUFF
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SHEET DELIVERY MECHANISM
Filed June13, 1945
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2,406,936
SHEET DELIVERY MECHANISM
‘Filed June 1:5, 1945
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Arthur B. woodv-wif
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AGENT
Patented Sept. 3, ‘1946
2,406,936
UNITED STATES PATENTOFFICE.
2,406,936
SHEET DELIVERY MECHANISM
Arthur B. Woodruff, Brecksville, Ohio, assignor
to Harris-Seybold Company, a corporation of
Delaware
1
Continuation of application Serial No. 412,390,
September 26, 1941. This application June 13,
1945, Serial No. 599,151
5_ Claims. (Cl. 271-79)
2
In the operation of printing presses equipped
with mechanism for accumulating the sheets in
a pile at the delivery end of the machine, it is
usually necessary to shut the press down while
the platform carrying an accumulated pile of
sheets is removed, an empty platform'is inserted
accumulation of sheets while the main delivery
platform is being removed and replaced.
Another object is to provide an auxiliary sheet
delivery device for a printing press which can
be placed into and out of operation quickly and
efficiently while the press is running.
The invention has been illustrated in connec
tion with a rotary offset lithographic printing
and the automatic piling and platform lowering
devices are adjusted to begin the stacking of a
new pile.
‘
press.
In the ?gures
‘
With the advent of modern high speed rotary 10
Fig. 1 is a side elevation view of a part of a
presses the frequency with which the operation
lithographic ‘press constructed according to the
has to be performed and the loss of production
invention.
for a given length of shut down time has in
Fig. 2 is an enlarged view of a part of Fig. 1
creased. Furthermore when thick stock such as
showing the auxiliary delivery. mechanism in
cardboard is being printed changes are still more 15 greater detail; the parts being in position to cause
frequent and the loss is thus further accentuated.
sheets to be deposited on the auxiliary platform.
Various solutions to this problem have been
Fig. 3 is a view similar to Fig. 2 but showing
proposed. For example, presses have been
the parts in position to permit the sheets to be
equipped with two full sized pile delivery mecha
conveyed to the main delivery platform.
nisms placed in line and equipped with controls 20 Fig. 4 is a plan view of the auxiliary delivery
permitting the depositing of sheets on either plat
mechanism corresponding to Figs. 1 and 2.
form while the other with its pile of sheets is
Referring to the drawings, I0 is the base of a
being removed and replaced by an empty plat
printing press resting on the floor. Side frames
form. - This arrangement is objectionable because
ll, l2, which are secured to base l0 support a
of the large amount of ?oor space required and 25 lithographic printing unit comprising impression
the high cost of constructing what amounts to
cylinder l3, blanket cylinder l4, plate cylinder
l5, form inking rollers 16, and dampening rollers
two complete delivery mechanisms.
In another arrangement a temporary platform
l‘l. Impression cylinder I3 is equipped with sheet
is inserted above the accumulated pile in position
grippers l8 which are arranged and operated to
to receive a relatively small number of sheets 30 open and close at proper times in known manner.
while the main platform is being changed, the
Sheets are fed to impression cylinder l3 by a
temporary platform then being withdrawn leav
transfer cylinder l9 which receives them from
ing its pile of sheets on the main platform. This
any suitable source such as a preceding printing
arrangement has not been satisfactory because
unit if the press is a multicolor press. It is to be
of the difficulty of inserting and removing the 35 understood, however, that the cylinders l3, l4, l5
temporary platform quickly while the machine is
may be the cylinders of a single color press, in
running and because the mechanism required in
which case cylinder l3 would receive sheets from
suitable sheet feeding mechanism.
terferes with convenient operation of the main
pile mechanism.
Frames ll, l2 also support a driven shaft 20
It'is an object of this invention to provide a 40 to which are keyed two sprockets 2|, one at each
side of the press, which drive a sheet delivery
delivery arrangement for a printing press or
conveyor, later described, in the usual manner
other machine which will permit continuous oper
known ‘in printing presses. Driving means of any
ation of the machine and will be free of the above
disadvantages and convenient and e?icient in
operation.
_
known or preferred kind, not shown, are provided
45 for rotating the cylinders in the directions indi
cated and for rotating shaft 26 for driving the
Another object is to provide delivery means for
a printing press which will provide two selectively
operable sheet delivery mechanisms in the same
?oor space as is ordinarily required for a press
having only. one such mechanism.
‘
" Another object is to provide a printing press
wherein the space between the main sheet de
livery and the nearest printing unit is utilized
conveyor.
‘
-
The main pile delivery mechanism is supported
by lower delivery side frames 22, 23, upper de
50
livery side frames 24, 25, and legs 26, 21, all of
which parts are secured to each other and to
cross support members, not shown, in known
manner to form a rigid supporting framework.
This main delivery mechanism is spaced from
both as a working space and as a space for the 55
the printing unit previously mentioned by a dis
2,406,936
3
4
tance suitable to provide the working space which
is required at times by the operator in perform
ing his duties incident to operation of the press,
and to provide space for the auxiliary pile de
livery mechanism subsequently to be described.
Delivery frames 22, 23 are joined to and spaced
properly from press frames II, I2 by coupling
frame members 28, 29 secured to the delivery
frames by bolts 39 and to the press frames by
65. The rear cables 66 extend upward, around
sheaves 19, then toward the press and around
sheaves H and downward to drums 12 keyed to
the automatic power driven pile lowering shaft
13 journaled in frames 22, 23. The front cables
61 extend upward and‘partly around sheaves ‘II
and thence downward and around drums 12.
operator may conveniently reach the parts of
frames, coupling members 28, 29, platform 34,
Known means not shown are provided for auto
matically gradually rotating shaft 13 to cause
10 platform 62 to lower at the proper rate to accom
bolts 3| and tie rod 32.
modate the accumulation of sheets in the pile
Frame members 28, 29 are formed with upward
56. Further description is deemed unnecessary
projections 33 which serve to support a work
since such mechanism is well known in the art.
platform 34 having angle iron cleats 35. The
It is to be noted that the various parts, includ
platform 34 extends across the press between
ing the printing unit, the press frames, delivery
frames and is arranged at such height that the
the printing unit such as the inking mechanism,
the plate cylinder I5, and blanket cylinder I4,
which he must work upon during operation ‘of the
press.
The conveyor by which sheets are conveyed
from impression cylinder I3 to the main pile de
livery mechanism comprises a pair of endless par
allel chains 36, 31, which support at intervals
corresponding to the circumference of cylinder
I3 a plurality of sets of grippers 38 (Fig. 1) for
grasping the forward edges of the sheets. Each
of these sets of grippers comprises a plurality of
and the sheet conveyor supports have been so
arranged as to provide a space below the lower
run of the conveyor and between the press and
delivery frames. In this space an auxiliary de
livery platform 1.4 is provided for receiving sheets
from the conveyor during the time a full main
platform 62 is being removed and replaced by an
empty platform, thus allowing continuous opera
tion of the press.
Auxiliary platform 14 is equipped with four
wheels or casters 15 carried in brackets 16 se
cured to the platform and the casters .15 are
guided between rails 11 bolted to the floor. Plat
?ngers 39 which are supported upon an oscillat
able shaft 49 and a like number of abutments 4I 30 form 14 is provided with side wall members 18,
carried by a ?xed shaft 42. The shafts 49 and
42 are supported at their ends by brackets 43
each of which is supported at two points by the
19 supported on brackets 89, 9I which may be
adjusted to accommodate different widths of
sheets by sliding the same along grooves 82 and
clamping by means of thumb screws 83. Each
corresponding chain 36 or 31. Spring means, not
shown, are provided tending to turn shaft 49 in 35 of the side wall members 18, ‘I9 has adjustably
clamped thereto an end wall member 84 sup
the direction to close ?ngers 39 on their abut
ported by an iron brace 85 one portion of which
.ments. Keyed to shaft 49 is a lever 44 which
slides in a groove 86 in the corresponding side
carries a cam follower roller 45 for the purpose of
wall member 18 or ‘I9. Brace 85 also has integral
opening the gripper ?ngers 39 against the afore
therewith a threaded stud 81 which extends
AH)
mentioned spring means.
through slot 88 and carries a wing nut 89 for
The chains 36, 31 carrying the sets of grippers
tightening the members 84 in various positions
just described travel around sprockets 2|, thence
to accommodate sheets of different lengths.
around sprockets 46, 41 suitably supported by
Platform ‘I4 is arranged to occupy a position
frames 22, 23 thence around sprockets or wheels
adjacent to a vertical plate 99 having cleats 9I
48 which are supported on a shaft 49 ?xed in
whichare fastened at their lower ends to a square
frames 24, 25. In traveling back toward the press
cross bar 92 secured by bolts 93 in frames 22 and
thesechains pass around idler wheels 59 and 5!
23 and at their upper ends to brackets 94 which
which are suitably supported on studs in frames
loosely embrace a shaft .95 rotatably journaled
'22, 23. Along the lower run of chains '38, 31
tracks 52, 53 vare provided along the upper edges 50 in the delivery side frames 22, 23. Plate 99
forms an end wall for the platform 14 when the
'of ‘whichthe chains run. These tracks are se
latter is in operative position and, in conjunction
‘cured to frames II, I2 by brackets 54 and to
with side wall members 18, ‘I9 and end wall
frames .22, 23 by brackets 55. Other tracks, not
members 89, forms a box like structure for re
shown, are ‘provided where needed to support the
ceiving sheets and forming them into a pile as
chains.
they are deposited by the sheet conveyor.
Mechanism of known construction is provided
To selectively control the deposition of sheets
for causing the sheets to be released by the sets
on the platform 14 mechanism is provided which
of grippers 38 and to be deposited in the form
will now be described. Below the delivery con
of a relatively high main pile-of sheets 56. such
mechanism comprises a bracket 51 supported 60 veyor drive shaft 29 is a cross support bar 96
secured by bolts 91 to frames II, I2. This bar
upon tie rod 58 and shaft 49 and carrying‘a grip~
has a pair of brackets 98 secured thereto by bolts
per opening cam 59 located in proper position
99 and these brackets carry a rotatable shaft I99
to engage each of the rollers 45 associated with
and a non-rotatable round bar 'I9'I. On shaft
the traveling sets of grippers. Cam 59 functions
to open gripper ?ngers 39 at the proper time to 65 I99 are keyed two tape drums I92 each carrying
a pin I93 to which one end of a torsion spring
cause the sheets to drop on pile 56. This action
I94 is secured, the other end of the spring being
is facilitated by the usual stripper ?ngers 69 and
secured to a pin I95 in bracket 98. Additional
lend stakes 6I.
tape drums in any desired number are also pro
The pile 58 is formed ‘upon a main delivery
vided, of which one is shown at I96. Springs I94
platform 62 which is provided with legs 93 and
are arranged to tend to turn shaft I99 in ‘the
is supported on cross beams 64 extending across
counter-clockwise direction as viewed in Fig. 1.
the .press and resting at their ends upon lift bars
Each of the drums I92, I96 has secured thereto
65. Each of the latter bars is raisedand lowered
one end ofa tape I91 of suitable length which is
by a pair of cables 66, 61 having .‘hooks 68 at
trained partly aroundlbar iIIl‘I and thence toward
their lowerends for engaging pins 69 in the bars
2,406,936
the delivery platforms to a bodily movable square
cross bar I08 to which it isfastened. by screw
I09. The ends of bar I88 are turned down to
form necks III] which slidably ?t into slots III
in guide bars H2 one of i which is fastened to
chain track 52 and. one to track 53 by bolts II I3.
Near each end of bar I88 is aih‘ole through which
extends a cable II4 having an enlarged end 'I I5
which are illustrated. in the drawings.‘ jThese
?ngers overlie the platform ‘I4 and are arranged
when in operative position to lie abovea sheet
held by the grippers 39 and below the shafts 49
and 42. They are also provided with abutments
I51 against which the sheets may strike when
released from the grippersand before settling
onto platform ‘I4.
‘
.
1
which prevents the cable from passing through
The movement of shaft 95 in the. clockwise
the hole in one direction. These cables extend 10 direction is limited by an adjustable stop com
toward the‘left in the ?gures, pass partly around
prising a screw I58 in stud I59 which is ?xed in
grooved‘idler wheels IIB on shaft 95 and thence
frame 22.
‘aroundgrooved winding drums II‘! to which the
The parts described above are arranged to
ends of the cables are attached.
occupy operative and inoperative positions shown
The drums II‘! are keyed to a shaft H3 which 15 respectively in Figs. 2 and 3.
is rotatably journaled in frames 22, 23 and is
If it is desired to‘ move the parts from operative
held against endwise movement by collar I I9 and
to inoperative position the hand lever I32 is
a small gear I29 keyed to the shaft. The hub of
moved counterclockwise until lever I55 strikes
each of the drums Il‘l carries a pin I22 to which
stop ‘I58. This ‘movement results in a partial ro
is secured one end of atorsion spring. I23 sur
rounding shaft H8, the other end of the spring
20 tation of shaft 535 and a corresponding shorten
ing of lever and link connection #36, i38 ‘suffi
being secured to a pin I24 in the corresponding
cient to raise cam. I49 out of engagement with
frame 22 or 23, The action of the springs I23
any of the rollers 45, thereby permitting the
is to tend to rotate shaft‘ I I8 counterclockwise
sheets to be carried past platform ‘M. This move
as viewed in vFigs. 1 to 3 thus tending to wind 25 ment of hand lever I32 ‘simultaneously causes
cables I I4 around drums II‘I.
partial, rotation of shaft 95 through the link and
Onrthe outside of frame 22 a bracket I25 is
lever connection I52, I55 thereby lowering strip
fastened to the frame by bolts E26. This bracket
per ?ngers I58 below the sheet path. At the
supports a rotatable stub shaft IZ‘I to ‘the inner
same time link i3£l and lever I29 impart a partial
end of which is keyed a large gear I28 whose 30 rotation to large gear I28 which, acting through
teeth mesh with the small gear E28 secured to
small gear I28 and shaft IIB causes counterclock
shaft II8. To the outer end of stub shaft I2‘!
wise rotation of drums II‘I thereby winding up a
is keyed a lever I29 to which is pivotably con
part of the cables H4 and moving bar I98 and
nected one end of a link I30 whose other end
tapes I87 into the dotted line position of Fig. 4
extends through a pin I3I pivotably mounted in 35 where they support the sheets in their travel
hand lever I32, Nuts I33 are provided to ad~
justably secure link I30 to pin I3I and lever I32
is provided with a handle I34.
Lever I32 is keyed to a shaft I35 which is
rotatably journaled in frames 22, 23 and has se
cured thereto a bifurcated lever I 36 which piv
otally carries between its bifurcations on pin I31
a link I38. Lever I33 is formed'with a projecting
over the platform ‘I4. ‘
If it is desired to move ‘the parts from inopera
tive to operative position the ‘hand lever I32 is
moved clockwise until abutment I39 of lever I39
strikes abutment I49 of link I38. This movement
is transmitted in the reverse direction through
the connections just mentioned to cause cam I49
to open grippers 39, stripper ?ngers I56 to strip
abutment 539. which is adapted to engage abut
the sheets from the grippers, and tapes I9‘! to
ment I48 of link'I38 to limit movement of the 45 be withdrawn away from sheet supporting posi
lever I36 and shaft I35 in one direction when
tion, as shown in Figs. 2 and 4. .
‘
lever I36 and link I38 are substantially in align
When it is desired to remove a pile of delivered
ment with each other.
'
sheets from the machine without stopping the
The other end of link I38 is provided with a
latter the operator moves hand lever I32 quickly
rotatable stud I4! having a shoulder portion I42 50 to its Fig. 2 position choosing such a time in the
and a reduced extension I43 which extends
press cycle as is required to cause the cam I49,
through slot I44 in a bracket I45 which is piv
stripper ?ngers I56 and tapes ID‘! to move into
otally mounted On tie rod I48 supported in frames
proper position after the leading edge of one
22, 23, Extension I43 of pin I4! is threaded and
sheet has passed the stripper ?ngers and before
carries a washer I41 and clamping nut I48 by 55 the leading edge of the next sheet reaches these
which bracket I45 is clamped against shoulder
?ngers. Thereafter all subsequent sheets will be
I42 of pin I4I. By means of the slot and clamp
deposited upon the auxiliary platform ‘I4. As
ing arrangement just described the operative po
soon as all sheets not deposited on platform ‘I4
sition of bracket I45 may be adjusted to suit
have been deposited in pile 5B the platform 52
conditions. A cam I49 is secured to bracket I45
60 is lowered to the floor and removed from the
by screws I59 and the parts are so arranged that
press in the usual way. An empty platform is
cam I49 lies in the path of travel of the cam
then placed in the press and the cables 6E, 61 are
rollers 45 by which the gripper ?ngers 39 may be
drawn up to raise the platform into sheet re
opened. As shown in Fig. 2 the cam I49 is in
ceiving position. When the main delivery is thus
operative position and will function to open each 65 made ready for a new pile, the operator moves
set of grippers as it passes the cam.
lever I32 quickly back to its Fig. 3 position again '
Hand lever I32 carries a second stud I5l which
choosing a proper time in the cycle of the ma
pivotally supports one end of a link I52 the other
chine. Platiorm ‘I4 is then withdrawn from the
end of which passes through noddle pin I53 and
machine on its wheels ‘I5, the accumulated sheets
is adjustably clamped thereto by nuts I54. 70 are removed, and the emptied platform replaced
Noddle pin I53 is pivotally held by a lever. I55
in position ready for use the next time a main
which is keyed to shaft 95. Secured on shaft 95
pile is to be removed.
'
at positions corresponding to the spaces between
The main delivery gripper opening cam 59
grippers 39 are stripper ?ngers I56, any desired
preferably remains always in operative position
number of which may be provided, and two of 75 as shown so that whenever a sheet is conveyed to
2,406,936
8
ing to the desire of the press operator, said last
the high level of the conveyor it is deposited on
the main platform. At other times the grippers
~mentioned means comprising a cam for opening
said grippers, ?ngers for stripping sheets from
said grippers, tapes adapted to occupy a position
This application is a continuation of applicant’s
original application, Ser. No. 412,390, ?led Sept. Cl over said second platform to support sheets in
merely open'and close without depositing ‘sheets.
26, 1941.
their passage thereover, and a hand lever opera
tively connected to said cam, ?ngers and tapes
for manually placing the same into and out of
'
The invention is not to be restricted to the de
tails of construction shown but is de?ned by the
position for depositing sheets on said second plat
following claims:
Having thus described my invention, I claim: 10 .form.
4. In a machine of the class described, a sheet
conveyor having upper and lower horizontal paths
of travel, said conveyor comprising a plurality of
grippers, a ?rst delivery platform, means for
sets of sheet grippers, a ?rst delivery platform,
opening said grippers to deposit sheets on said
?rst delivery platform, a second delivery plat 15 means associated with said upper path for open
ing said grippers to deposit sheets on said ?rst
form, and means for depositing sheets on said
delivery platform, a second delivery platform, and
second delivery platform or permitting convey
means associated with said lower path for de
ance of sheets to said ?rst delivery platform ac
positing sheets on said second delivery platform
cording to the desire of the press operator, said
1. In a machine of the class described, a sheet
conveyor comprising ‘a plurality of sets of sheet
last-mentioned means comprising a cam for open
20 or permitting conveyance of sheets to said upper
path according to the desire of the press operator,
ing said grippers, sheet supporting means adapted
to occupy a position over said second platform to
support sheets in their passage thereover, and
connections enabling said cam and sheet support
ing means to be placed into or out of position for
depositing sheets on said second platform.
said last mentioned means comprising a cam for
opening said grippers, ?ngers for stripping sheets
from said grippers, tapes adapted to occupy a
position over said second platform to support
sheets in their passage thereover, and connections
enabling said cam, ?ngers, and tap-es to be placed
2. In a machine of the class described, a sheet
into or out of operative condition simultaneously.
conveyor comprising a plurality of sets of sheet
5. In a machine of the class described, a sheet
grippers, a ?rst delivery platform, means for
conveyor
having upper and lower horizontal paths
‘opening said grippers to deposit sheets on said 30
of travel, said conveyor comprising a plurality of
?rst delivery platform, a second delivery platform,
sets of sheet grippers, a ?rst delivery platform,
and means for depositing sheets on said second
means associated with said upper path for open
delivery platform or permitting conveyance of
ing said grippers to deposit sheets on said ?rst
sheets to said ?rst delivery platform according to
the desire of the press operator, said last-men
35
delivery platform, a second delivery platform, and
tioned means comprising a cam for opening said
means associated with said lower path for de
conveyor comprising a plurality of sets of sheet
grippers, a ?rst delivery platform, means for
opening said grippers to deposit sheets on said
?rst delivery platform, a second ‘delivery‘platform,
sheets in their passage thereover, and a hand
positing sheets on said second delivery platform
grippers, traveling tapes adapted to occupy a
or permitting conveyance of sheets to said upper
position over said second platform to support
path according to the desire of the press operator,
sheets in their passage thereover, and connections
enabling said cam and tapes to be placed into or 40 said last mentioned means comprising a cam for
opening said grippers, ?ngers for stripping sheets
out of operative position for depositing sheets on
from said grippers, tapes adapted to occupy a
said second platform.
position over said second platform to support
3. In a machine of the class described, a sheet
and means for depositing sheets on ‘said second
delivery platform or permitting conveyance of
said sheets to said ?rst delivery platform accord
lever operatively connected to said cam, ?ngers
and tapes for manually placing the same into and
out of position for depositing sheets on said sec
ond platform.
ARTHUR B. WOODRUFF.
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