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Патент USA US3051488

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Aug. 2.8, 1962
O. L. GORE
SHEET HANDLING APPARATUS
Filed May 23, 1958
3,051,479
United States Patent
dce
3,151,479
Patented Aug'. 28, 1962
1
2
3,051,479
other in an orderly pile for further handling thereof.
Conveyor 10 comprises a plurality of transversely spaced
and parallel endless belts 12 the rear ends of which pass
SHEET HANDLING APPARATUS
Owen L. Gore, Hillsdale, NJ., assigner to Miehle-Goss
Dexter, Incorporated, Chicago, Ill., a corporation of
Delaware
Filed May 23, 1958, Ser. No. 737,307
11 Claims. (Cl. 271-68)
This invention relates to sheet handling apparatus, and
around a suitable roller or rollers (not shown) located
adjacent the discharge end of the sheet turnover mecha
nism. The front ends of belts 12 pass around a plu
rality of rollers 13 which are fixed in spaced relation
on a transversely extending shaft 114. This shaft is jour
nalled at its opposite ends in suitable bearings provided
more particularly to a method and an apparatus for re
in transversely spaced rear uprights 16. Uprights 16 form
part of the pile delivery frame which includes two trans
material as the same are discharged from various process
. versely spaced similar front uprights 17, said uprights
ing machines.
being bolted to the machine foundation and connected
One object of the present invention is to provide a
together by side members 18. The front uprights 17 are
novel method of and an improved sheet piling apparatus 15 connected together at the tops thereof by a stay shaft 20,
ceiving and piling sheets of tin plate and other metallic
of novel, simple and durable construction that will re
ceive and evenly pile a successive series of rapidly moving
sheets of metallic material without scratching their sur
faces or otherwise injuring the same.
Another object is to provide an improved sheet piling
apparatus wherein the successive sheets are temporarily
and magnetically suspended and caused to move on a sub
the rear uprights 16 are connected together at the tops
thereof by a stay shaft 21, and at vertically spaced points
below the belt roller shaft 14 by cross members 22 and 23.
The belts 12 are continuously driven to advance the
sheets of tin plate at a high rate of speed in a continu
ously moving procession from the baking oven and turn
over unit to the pile delivery 11, and said operation may
stantially horizontal plane and simultaneously magneti
be efïected, as desired, directly from said unit or from a
cally causing the forward speed thereof to be decelerated
until they are completely over piling position whereupon
ried by the pile delivery frame and connected by suitable
said sheets will bodily fall flatwise one on top of the other
known means with the belt roller shaft 14.
to form an even pile.
A still further object is to provide an improved sheet
piling apparatus having novelly arranged sheet slow-down
separate source of power, such as an electric motor car
If desired, advancing rollers and cooperating pressure
rollers may be located at the discharge end of conveyor
10 in the same manner as disclosed in United States Patent
means and magnetic means for attracting and temporarily 30 No. 2,626,800, granted J an. 27, 1953 to George A. Martin,
holding each sheet in contact with the sheet slow-down
to further advance and guide the sheet `as it leaves the
means wherein the successive sheets are caused to move
endless conveyor.
and be decelerated on a substantially horizontal plane
In accordance with one aspect of the present invention,
until they are completely over piling position whereupon
sheet slow-down and magnetic supporting means of novel
said sheets will fall ilatwise one on top of the other to
construction are provided in the space over the piling po
form an even pile.
sition for the creating of magnetic fields to cause the
The above and further objects and novel features of
sheet as it leaves the endless conveyor at a high rate of
the present invention will more fully appear from the
speed to be decelerated and at the same time to move
following detail description when the same is read in
forward in a substantially horizontal plane into space
connection with the accompanying drawings. It is to be 40 until approximately the entire sheet is disposed over the
expressly understood, however, that the drawings are for
piling position. In this manner, the successive sheets are
the purpose of illustration only, and are not intended as
advanced under positive control to piling position, each
a delinition of the limits of the invention.
succeeding `sheet is decelerated, supported and suspended
In the drawings, wherein like reference characters refer
in space and is prevented from dragging along and mar
to like parts throughout the several views,
ring the upper surfaces of a preceding delivered and piled
FIG. 1 is a vertical longitudinal sectional view of a sheet
sheet, and upon reaching piling position the successive
delivery embodying the present invention; and
sheets will bodily yfall ñatwise one on top of the other
FIG. 2. is an enlarged bottom View of the sheet slow
in an accumulated pile thereof.
down and magnetic supporting means taken on line ‘2--2
As shown in FIG. l of the drawings, the sheet slow
of FIG. l with the sheet broken away for purposes of 50 down and supporting means comprises a plurality of
clearer illustration.
transversely spaced and parallel endless belts 24 and a
Referring to the drawings, there is shown one form
plurality of permanent horseshoe or U-shaped magnets
of a high speed sheet delivery apparatus embodying the
'25, 26 mounted in the space above the pile support and
present invention which is particularly adapted for slow
over a portion of the horizontal path of movement of
ing down and piling sheets of tin plate as the same are 55 said sheets in said space. Each belt 24 is mounted for
delivered to said apparatus at a speed of approximately
movement on a pair of spaced apart rolls 27. Rolls 2.7
1Z0-150 sheets per minute from a combined drying or
are slidably mounted on parallel shafts 28, 29‘ which are
baking oven and sheet turnover unit employed in the proc
secured at their opposite ends to side members 30 of
essing or making of metal articles or containers. It
the delivery frame. The rolls 27 and belts 24 carried
will be understood, however, that the high speed sheet 60 thereby are therefore adjustable horizontally from side
delivery apparatus disclosed herein may be advantageously
to side along shafts 28, 29‘ to accommodate a variety of
and effectively employed in connection with other ma
chines for slowing down and piling sheets of tin plate or
sheet widths and may be secured in any desired position
of adjustment thereon by set screws 321. The lower
other metal sheets of a magnetic character as the same
reaches of endless belts 24 are adapted to be contacted
are discharged from said machines.
65 by portions of the upper surface of the sheets and to
enable the forward speed `of each sheet to be slowed down
In the illustrated embodiment, the sheets of tin plate
pass in rapid succession from the baking oven and turn
by such contact said belts are driven continuously and
over unit with their treated surfaces uppermost onto a
at a sur-face speed slower than the surface speed of belts
horizontally disposed endless conveyor 10 which advances
12. For this purpose the driven belt roller Shaft 14 has
said sheets at a high speed away from said unit to a pile 70 fixed thereon adjacent one end thereof a spur gear 32
delivery 11 wherein sheets are piled one on top of the
which meshes with and drives a gear 33 which is larger
3,051,479
4
3
port the entire weight of each sheet against said belts.
than gear 32 and is journalled on `a stud which is secured
in any suitable manner in the upright 16. Gear 33 meshes
with and drives an idler gear 34 that is journalled on a
Magnets 25 and 26 are also positioned a sufficient dis
tance above the lower reaches of belts 24 to prevent the
stud which is secured in any suitable manner on side
sheets from coming into Contact therewith.
plate 30.
Endless belts
Idler gear 3‘4 meshes with »and drives a gear 5 24 are positioned apart from each other a sufficient dis
35 which is fixed on and drives shaft 28. End-less belts
24 are thus driven continuously by shaft 14 in the same
direction as belts 12 and at a slower surface speed than
tance to prevent the central portion of each sheet, as
it is magnetically lifted and held in contact with said
the surface speed of said belts -through gears 33, 34, 25
the magnets. Magnets 25, 26 not only serve to lift the
belts, from being pulled upwardly and into contact with
and spur gear 32. Endless belts 24 are also mounted 10 sheets and hold the same in contact with the endless
belts but the intensity of the magnetic lields 36, 37 and
such that the forward ends thereof are positioned lower
38 of said magnets is great enough to cause the forward
than the rear ends so that the sheet contacting surfaces
speed of each sheet to be decelerated. Thus there are two
of said belts are at a forwardly inclined position to enable
decelerating forces acting upon each sheet. While the
said sheet slow-down and supporting means to more ef
forward movement of each sheet is decelerated as it
fectively receive each sheet as it is fed into said space
moves forward in said space the complete stopping of
from conveyor 12.
the forward movement thereof occurs when the leading
Mounted above endless belts 24 are a plurality of
edge strikes the cushion 72 of the front sheet jogger 60
horseshoe or U-shaped magnet elements and transversely
positioned in relation to said belts such 4that the magnetic
fields therefrom extend generally downwardly between
said belts and into and through the horizontal path of the
whereby the sheet falls flatwise by gravity a short distance
onto a piling platform or skid 58. Endless belts 24, in
addition to the above described operation, may be held
sheet in said space. Each of magnets 25, 26 has a north
stationary or caused to move in a direction opposite from
land south pole, indicated at N and S, with magnetic
fields 36, 38 respectively, extending between said unlike
the direction of belt 12 whereby the decelerating force
acting upon each sheet which is magnetically lifted into
Magnets 25,' 26 are mounted on plate 39 in a 25 contact with said belts may be varied.
In operation, as each sheet enters into the space over
the pile support at a high rate of speed it is subjected to
of each magnet being unlike poles so that a further mag
the following composite forces. Each sheet enters said
netic field 37 is created between said magnets.
poles.
spaced apart position to each other with the adjacent poles
As herein shown, the magnets 25, 26 are supported
space at a high rate of speed and the leading edge there
on an auxiliary frame comprising side members 40 and 30 of tends to drop downwardly the further into said space
front parallel cross members 41, 42. Cross members 41,
42 are secured to brackets 43 (not shown) slidably
that it travels. Centered over the forward portion of said
spiace are endless belts 24 and magnets 25 and 26 hav
ing magnetic fields 36, 37 and 38 ywhich extend down
wardly into and through the normal horizontal path of
also supports sheet joggling devices hereinafter to be
described in detail. The cro-ss members 417 E42 and the 35 movement tof said sheets. As the leading portion of each
sheet enters into said magnetic fields it is lifted upwardly
magnets 25, 26 together with the sheet jogging devices
toward magnets 25 and 26 and into contact with slowly
carried thereby are therefore adjustable rearwardly and
moving endless belts 24 whereby the »forward speed there
forwardly along the side members 40 and may be secured
of is decelerated Iby a combination o-f the frictional con
in any desired position of adjustment thereon by set
screws which are threadedly secured in brackets 43. The 40 tact lwith and the slower speed of said belts and the in
tensity of said magnetic fields. As the leading portion
auxiliary frame is pivotally mounted at the rear thereof,
mounted on the side members 40'.
Cross member 42
of each sheet moves into said magnetic field, as described
as indicated at 45, on upright supports 46 secured to
side members 18 of the auxiliary frame. The auxiliary
above, the trailing portion leaves the conveyor 10 and is
frame is supported at the front thereof by laterally pro
pulled downwardly by gravity. Since the magnets 25
jecting -brackets 47 secured in the front uprights 17. It 45 and 26 cannot support the weight of Ithe entire sheet, it
will be noted that the pivotal mounting of the auxiliary
will be peeled downwardly away from belts 24 and said
frame enables said frame with the front magnets and the
magnets. Each sheet moves forward for a short distance
sheet jogging devices carried thereby to yield upwardly
at a greatly decelerated speed and lin a rearwardly in
in the event the elevator of the pile support mechanism
clined position until it strikes the front sheet joggers 60
to be hereinafter described is accidently raised too high, 50 which stops all forward movement whereby the sheet falls
thus preventing damage to the sheet jogging devices
flatwise by gravity a short distance onto the platform 58.
through engagement of the pile supporting platform
As the «trailing end of each sheet lfalls downwardly, as
therewith. The magnets 25, 26 are supported by a
described above, the leading end of the succeeding sheet
bracket 48 comprising a generally vertically extending
enters into said space and the above described cycle is
portion 49 and a horizontally extending portion 5t). f repeated giving in effect a shingling of successive sheets
Bracket 48 is movably supported on parallel cross mem
in space.
bers 41, 42 »and said bracket together with the magnets
In the piling of lightweight sheets, it may not be neces
25, 26 carried thereby are therefor adjustable horizontally
sary to utilize the belts 24 to assist in the deceleration
from side to side along the cross members 41, 42 and
of each sheet. If desired, the magnets 25 and 26 may
may be secured in any desired position of adjustment 60 be employed alone without the use of endless belts 24.
thereon by the use of suitable setfscrews threadedly en
In such an embodiment the magnets 25, 26 are positioned
gaged throught the upper portion of said bracket and
sufficiently above the path of each sheet into the space
into cross member 41. Magnets 25, 26 with their open
over the pile support so that the magnetic fields 36, 3’7,
ends pointed downwardly are secured «at their top por
38 extend through said path and support each sheet in
tions to a` plate 39 which is suitably secured for example 65 a floating path through said space. The intensity of the
by bolts, to two longitudinally spaced vertically extend
magnetic ñelds is not sufficient to lift the sheet into con
ing bars 51 the upper ends of which are adapted to fit
tact with the magnets but temporarily supports eac-h sheet
into apertures 5-2 in horizontal portion 50' of bracket 48.
in a float-ing and substantially horizontal path of move
Plate 39 has a series of apertures to permit bars 51 to
ment. =In the operation of this embodiment, as the leading
be bolted thereto at several positions on said plate. Bars
portion of each sheet enters into magnetic lields 36, 37
51 are vertically adjustably secured in apertures 52 by
and 38 it is lifted upwardly toward magnets 25 and 26
set screws 53. Magnetic fields 36, 37 and 38 of magnets
but not into contact with them to maintain a floating and
25 and 26 are strong enough to support the leading por
substantially horizontal path of movement. The inten
tion of each sheet and hold the same in contact with
sity of magnetic ñelds 36, 37 and 38 also further serves
the endless beltsbut are not of suñ’icient intensity to sup 75 to decelerate the forward speed of each sheet. As the
3,051,479
5
6
leading por-tion of each sheet moves into the magnetic
fields, as described above, the trailing portion leaves the
conveyor 10- and is pulled downwardly by gravity. Since
tion, mounting and operation, therefore a description of
magnets 25 and 26 cannot support the weight of the en
tire sheet, it will be peeled downwardly away from mag
netic fields 36, l37 and 38. The combined forces acting
on each sheet as it 'falls downwardly is the same as de
one of said front jogging devices and one of said side
magnet devices will be sufficient for an understanding of
the operation and function of all.
As herein shown, the front sheet jogging devices 60 are
supported on the auxiliary frame described above in con
nection with the support for the magnets 2S, 26. In FIG.
1 of the drawings each front sheet jogging device 60 com
scribed earlier as each sheet falls downwardly from the
prises a front plate 62 and a rear plate 63 both of which are
endless belts 24.
As shown in FIG. 1, the platform or skid 5'8 is remov l0 supported by and depend downwardly from `a bifurcated
ably supported on a pile elevator which includes a U
collar 64 which is loosely mounted for pivotal movement
shaped frame or support 59‘ which carries the platform
on the cross member 42. Bifurcated collar 64 has a
downwardly projecting leg 65 and a horizontally project
5S and which is open at the front thereof to receive a
portable track for unloading of said platform and the
pile of sheets thereon from said elevator through the
front of the delivery. The support 59 is lowered step-by
step to maintain the top of the pile of delivered sheets
at a selected minimum distance ibelow magnets 25 and 26,
and this is accomplished by a ratchet 100 drivably con
nected with the elevator and an oscillating pawl 99 en
gaged with said ratchet. The operation of the pawl and
ratchet drive 99, 1001 is controlled by a solenoid 117
which is operatively associa-ted with a pawl controlling
mask 122 to normally hold the pawl 99 out of operative
connection with the ratchet 100. Solenoid 117 is in turn
electrically controlled by `a switch which is `actuated by
ing leg 66 positioned at right angles to leg 65. The upper
end of plate 63 is suitably secured to leg 65. The upper
end of plate 62 is secured to the end of leg 66 by a hinge
67, said hinge permitting plate 62 to pivotally swing from
its normally vertical position toward plate 63. Plates 62,
63 are thus pivotally mounted from their upper ends from
the same support and depend vertically downward and
parallel to each other. Loosely mounted bifurcated col
lar 64 and plates 62, 63 are adjustable along cross member
42 and may be secured in any desired position of adjust
ment thereon by a thumb screw 68 which is threaded into
a collar engaged over said cross member and disposed be
tween the forked arms of collar 6'4. The lower ends of
plates 62 and 63 are resiliently connected by a spring 71.
The vertical dimensions of plates 62, 63 are such that
they extend a short distance below the normal level of the
to the top of the pile of sheets on the elevator. The con
struction and operation of pawl and ratchet drive 99, 100 30 top of the pile of sheets on support 5S. Extending along
the front surface of plate 62 from the lower end to a
is similar to and is described in more detail in the above
point substantially above the horizontal path of movement
mentioned U.S. Pat. No. 2,626,800. When the -top of the
a movable arm 106 having mounted thereon a ls-wingable
lever 107 which lever is disposed in opera-tive relation
pile of sheets on the elevator is at a normal level below
the swingable lever 107, the arm 106 will not actuate the
of a sheet from the conveyor is an energy absorbing cush
the arm 106 is moved to actuate the switch and the sole
noid 117‘ which in turn acts upon the pawl mask 122
to enable engagement of the pawl 99v with the ratchet 100
to rotate the latter and thereby effect downward move
«members 40 until the front surface of cushion 72 touches
pile of sheets resting on platform 58 as front joggers 60
ment of the elevator and the pile thereon until the top
of said pile again reaches the normal level thereof.
being fed and the desired spacing of the joggers along
ion 72 comprising, for example, a pad of ensolite, type
switch and the solenoid 117 and the oscillating pawl 99 35 22226, manufactured by U.S. Rubber Co. and covered
with a sheet of neoprene “Monarch” to protect the en
is held out of engagemen-t with the ratchet 100 by the
solite from being cut. Plate 63 is weighted by a weight
mask 122 and no downward movement will be imparted
73 which is adjustably secured to a pin 74 that is, in turn,
to `said elevator and said pile. As the delivered sheets
secured to the end of plate 63.
d_rop one after another on the pile the latter thereby pro
In the initial operation of the pile delivery, the de
gressively increases, the lever 107 is prevented from pivot 40
scribed front sheet joggers 60 are moved along the side
ally swinging on arm 106 by said piled sheets, whereupon
Disposed slightly forward of rollers 13 and supported
on cross members 22, 23 of the delivery fr-ame by means
of forwardly extending ‘bars 54, is a vertically extending
metal plate 55 against which the successively delivered
sheets are jogged, as hereinafter described, and against
which the rear edge of the pile of delivered sheets bears
during lowering of said pile and the elevator as herein
before described. Suitably secured to the upper end of
plate 55 are three vertically extending »guides 56 having
the inner edges thereof aligned with the inner surface of
the edges of a previously manually stacked and aligned
loosely extend vertically downward. loggers 60 are ad
justed, along cross member 42, for the width of the sheet
that width.
Accordingly, as `each sheet is fed into the »space over the
pile support it is directed, supported and slowed down by
the magnets 25 ‘and 26 and endless belts 24 or by magnets
2S and 26 alone, as hereinbefore described, and the front
edge of sai-d sheet strikes the cushion 72, thus checking
the sheet `against further forward movement. Cushion
72 prevents damage to the front edge of the sheet as it
strikes said joggers. rIhe force of the sheet striking
against cushion 72 will force the lower end of plate 62
to pivotally move forward against the resilient force of
'spring 71 which will become compressed and transmit the
force to the lower end of plate 63 which in turn will piv
said plate and constituting an extension thereof. The
upper ends of guides 56 have inwardly inclined surfaces
57 whereby as the sheets fall downwardly the rear edge
otally move for-ward as it absorbs the force transmitted
thereof is guided into alignment with the inner surfaces
to it. The shock absorbing force of plate 63 can be in
of plate 55 against which they are jogged into an evenly
creased as desired by lmoving weight 73 outwardly along
stacked pile of sheets.
pin 7'4 away from said plate. Compressed sprin-g 71 will
IIn accordance with another aspect of the invention,
sheet jogging devices of novel construction and operation 65 instantly return plate 62 to its vertical position -lwhere it
will receive the impact of the succeeding sheet of a series
are provided to cause the successive sheets upon delivery
being rapidly «fed from conveyor 10. As the sheet is
thereof to the support 59‘ to pile evenly thereon and with
peeled away from the magnetic fields 36, 37 and '38, it
out relative sliding movement. In the illustrated embodi
ment four sheet jogging devices indicated generally at 60 70 will drop flatwise toward the pile along the pile guide 55
are employed at the front of the delivery, and a side mag
onto the pile and to a final position thereon with its rear
net device indicated generally at 61 is employed at each
side of said delivery. The front sheet jogging devices
60 are identical in construction, mounting and operation,
edge engaged with the pile guide 55 and its front edge
aligned with the front edges `of the previously `delivered
and piled sheets. Thus, each sheet is deposited on the
and the side magnet devices 61 are identical in construc
75 ' pile
without sliding forwardly or rearwardly relative to
3,051,479
8
the previously delivered underlyin-g sheet and an even pil
ing of sheets is obtained.
It is to be noted that as plate 62 returns to its vertical
position, the lower end of cushion 72 thereon strikes the
top portion of the previously piled sheets to impart a rear
sheets in said space and adapted to contact the upper sur
face of the forward portion of each sheet as it moves into
said space, magnet means located above the sheet slow
down means having a magnetic ñeld extending down
'ward tap or thrust to said sheets whereby engagement of
the forward portion of the horizontal path of movement
the same `with the guide 55 and an even piling thereof is
of said sheet and adapted to magnetically attract only the
forward portion of each sheet and lift the same so that
its upper surface is in contact with the slow-down means
while at the same time exerting a decelerating force upon
said sheet whereby the sheet is decelerated so that the
pull of gravity on the entire sheet will overcome the
magnetic attraction of said magnet and the sheet will
further assured. This novel construction of front sheet
joggers prevents said joggers from swinging excessively
when struck by a forward moving 'sheet and assures that
they will be returned to the vertical position in time to
absorb the impact of the succeeding sheet.
Referring no-w to FIG. 1 of the drawings, each of the
side magnet devices 61 comprises a vertically extending
permanent magnet 75 lwhich is U-shaped in top plan View
or 4horizontal cross section, thereby forming north and
south poles, indicated at N and S, which are transversely
spaced Áwith `respect to the vertical movement of the pile
of sheets whereby -a »magnetic field horizontally extends
wardly through the slow down means and through only
fall ilatwise onto the pile support.
2. In the combination as set forth in claim 1, wherein
the sheet slow-down means comprises a pair of trans
versely spaced non-magnetic elements adapted to engage
portions of the upper surface of said sheets.
3. In a delivery apparatus comprising a support for a
into the `downward path `of the sheets being delivered to 20 pile of metal sheets, means for conveying sheets one after
another generally horizontally forward into the space
said pile. A vertically extending cover plate 76 having
over said support, magnetic means located above only
an inwardly inclined surface at the upper end thereof is
said pile support and above a portion of the path of
suitably secured across the open end of said magnet. A
each sheet in said space and adapted to temporarily sup~
vertically extending support bar 77 is suitably secured at
its lower end to the rear of magnet 75 and supported and 25 port only a portion of said sheet suspended in said space
and to maintain a generally horizontal path of movement
guided at its upper end for floating movement in vertical
of said sheet through said space but not to support the
and horizontal directions on horizontally disposed bracket
entire weight of each sheet and to decrease the forward
1 78. Bracket 78 is adjustably secured to cross member
speed thereof, a stop means adapted to limit the forward
41, by bolts for example, whereby each side jogger may
be adjusted for the width of the sheet being piled. A U 30 movement of said sheet when the leading edge of said
sheet is in vertical alignment with the forward edge
shaped plate 86 is bolted to the side of bracket 78 to
of said pile support, whereupon the sheet will fall flatwise
provide a suitable slot 81 to slidably receive the upper
downwardly and onto said pile support.
end of magnet support bar 77. A series of apertures 82
4. A delivery apparatus comprising a support for a pile
in bracket 78 permits plate S0 to be bolted thereto at
of metal sheets, means for conveying sheets one after
various places whereby forward and rearward adjustment
another generally horizontally forward into the space
of the support bar 77 on said bracket is possible. A
pin 83 at the upper end of bar 77 limits its downward
movement in slot 81. It will thus be noted that the
floating .mounting of bars 77 enables the magnet 75 to
over said support, a magnet having a magnetic field ex
tending downwardly into and through only the forward
portion of the path of travel of each sheet into said
freely yield upwardly in the event the elevator is accident 40 space over the support, a slow-down means located be
tween said magnet and said path of a sheet, said magnet
ly raised too high. Side magnet devices 61 magnetically
and said slowdown means being positioned in relation to
attract the outer corners of the leading edge of the sheet
as it falls downwardly past said magnets. In a flexible
sheet, the outer corners of the leading edge thereof will
tend to bend slightly downward in which case these bent
down corners will strike the surface of the preceding piled
sheet and mar it. Side magnets 61, however, =will magnet
ically attract these outer corners and -as the sheet falls
each other and to said path of travel of each sheet so
that only the forward portion of each sheet is magnet
ically attracted and lifted and the upper surface thereof
is temporarily held in contact with said slow-down means,
said magnetic field having an intensity sufficient to sup
port only the forward portion of each sheet whereby
when the entire sheet is in the space over said support
downwardly said outer corners rwill be straightened out,
thus preventing said corners from striking and marring 50 the weight of said sheet will carry the same out of said
magnetic field and the same will fall downwardly onto
the upper surface ‘of the precedingly piled sheet.
said pile support.
While the present invention is herein illustrated and
5. A delivery apparatus as set forth in claim 4, wherein
described in connection with the receiving and piling of
the slow-down means comprises a pair of transversely
metal sheets as the same are discharged from a combined
spaced non-magnetic elements adapted to engage portions
drying over and Isheet turnover unit, it is equally adapted
of the upper surface of said sheets.
(for the receiving and piling of metal sheets discharged
6. A delivery apparatus as set forth in claim 4, where
fro-m various other instrumentalities acting on such sheets.
in the slow-down means comprises a pair of non~magnetic
Moreover, the present invention may be equally adapted
transversely spaced endless belts adapted to engage the
to any other type of apparatus ‘other than a receiving and
piling apparatus which would require metallic sheets to 60 outer longitudinal edge portions of the upper surface of
be suspended in a horizontal path of movement and their
said sheets.
lforward speed simultaneously decelerated.
7. A delivery apparatus as set forth in claim 6, wherein
Various changes may be made in the design and ar
the endless belts are moved in lthe same direction as the
rangement of the parts of -the illustrated embodiment
movement of said sheet'in said space but at a substan
without departing from the spirit and scope of the in 65 tially less rate of speed than the entrance `speed of said
vention as will now be clear to those skilled in the art.
`sheets into said space.
It is therefore to be expressly understood that the present
8. A delivery apparatus as set forth in claim 4, wherein
invention is not limited to the particular embodiment
the magnet is of the permanent type and comprises a plu
thereof herein illustrated and described.
rality of magnets each being U-shaped and having a pair
70
What is claimed is:
of transversely spaced and aligned unlike magnetic poles
1. In the combination of a support for a pile of metal
with a magnetic field between said poles and Where
sheets and means to convey metal sheets one after an
in said magnets are longitudinally spaced along the
other generally horizontally forward into the space over
path 0f movement of said sheets and aligned with
said support, a sheet slow-down means located above only
-a portion of the horizontal path of movement of said 75 each other so that unlike poles of each magnet are ad
3,051,479
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9
wardly as each sheet is decclerated whereby the entire
jacent but spaced from each other thereby creating an
additional magnetic field between adjacent magnets.
sheet will be pulled downwardly by gravity and the for
9. The method of delivering rnetal sheets to a pile
support comprising the steps of feeding sheets one after
another and in non-overlapping relation to each other and
ward end will be removed from engagement from said
fixed support.
11. The method of delivering metal sheets `to a pile
support comprising the steps of feeding sheets one after
another and in non-overlapping relation to each other
and into a generally horizontally extending path in the
space over said support, `temporarily securing only the
into a generally horizontally extending path in the space
over said support, temporarily engaging only the forward
end of each sheet after Vsaid end has passed substantially
into the space over said support and before said forward
end has passed completely `through said space and simul 10 top surface of the forward end of each sheet to a fixed
support after said end has passed substantially into the
taneously with said engaging causing the horizontally
space over said support and simultaneously with said
forward motion of each sheet to be decelerated, causing
securing applying an opposing horizontal force `to said
the rear end of each sheet to fall downwardly as each
top surface to cause the horizontally forward motion of
sheet is decelerated whereby the entire sheet will be pulled
downwardly by gravity and the forward end will be de 15 each sheet to be decelerated, causing the rear end of each
sheet to fall downwardly as each sheet is decelerated
tached from said temporary support.
whereby the entire sheet will be pulled downwardly by
10. The method of delivering metal sheets to a pile
gravity and the forward end will be detached yfrom said
support comprising the steps of feeding sheets one after
fixed support.
another and in non-overlapipng relation to each other and
into a generally horizontally extending path into the space 2O
References Cited in the file of this patent
over said support, causing only the forward end of each
UNITED STATES PATENTS
sheet to engage and to Ábe retained by a fixed support afte_r
said end has passed substantially into the space over said
2,183,798
Theise ______________ __ Dec. 19, 1939
support and simultaneously with said engaging causing
the horizontally forward motion of each sheet to be de
celerated, causing the rear end of each sheet to fall down
25
2,527,911
2,779,594
2,860,874
Buccicone ____________ __ Oct. 3l, 1950
Buccicone ___________ __ Jan. 29, 1957
Gulick ______________ __ Nov. 18, 1958
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