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Патент USA US3032350

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May 1, 1962
1.. |_. LAWRENCE
3,032,340
SHEET HANDLING APPARATUS
Filed May 23, 1958
'
INVENTOR.
74
LOUIS
L.. LAWRENCE
BY
ATTOR EYS
United States Patent 0 ”
2
1
_
3,032,340
3,032,340
Patented May 1, 1962
baking oven and sheet turnover unit employed in the
processing or making of metal articles or containers. It
_
will be understood, however, that the high speed sheet
SHEET HANDLING APPARATUS
Louis L. Lawrence, Newburgh, N.Y., assignor to Miehle
Goss-Dexter, Incorporated, Chicago, Ill., a corporation
delivery apparatus disclosed herein may be advantageous
ly and effectively employed in connection with other ma
chines for slowing down and piling sheets of tin plate
of Delaware
Filed May 23, 1958, Ser. No. 737,366
or other sheets of metal or other materials as the same
9 Claims. (Cl. 271-68)
are discharged from said machines.
In the illustrated embodiment, the sheets of tin plate
This invention relates to sheet handling apparatus, and
more particularly to apparatus for receiving and piling 10 pass in rapid succession from the baking oven and turn
over unit with their treated surfaces uppermost onto a
sheets of tin plate and other materials as the same are
horizontally disposed endless conveyer 10‘ which lad
discharged from various processing machines.
vances said sheets at a high speed away from said unit
to a pile delivery 11 wherein sheets are piled one on
One object of the present invention is to provide an
improved sheet piling apparatus of novel, simple and
durable construction that will receive and evenly pile a 15 top of the other in an orderly pile for further handling
thereof. Conveyor 10 comprises a plurality of trans
successive series of rapidly moving sheets of tin plate
versely spaced and parallel endless belts 12 the rear ends
or other material without scratching their surfaces or
of which pass around a suitable roller or rollers (not
otherwise injuring the same.
shown) located adjacent the discharge end of the sheet
Another object of the invention is to provide an im
proved pile delivery for metal sheets wherein the suc 20 turnover mechanism. The front ends of belts 12 pass
around a plurality of rollers 13 which are ?xed in spaced
cessive sheets are caused to move in a substantially hori
relation on a transversely extending shaft 14. This shaft
zontal path until they are completely over piling posi
is jounalled at its opposite ends in suitable bearings pro
tion, whereupon said sheets will fall ?atwise one on top
vided in rear uprights 16. Uprights 16 form part of the
of the other without relative sliding movement and form
an even pile thereon, and each succeeding sheet will be 25 pile delivery frame which includes two transversely
spaced similar front uprights 17, said uprights being bolt
prevented from dragging along the upper surface of a
ed to the machine foundation and connected together by
preceding delivered and piled sheet.
the side members 18. The front uprights 17 are con
Another object of the invention is to provide in a pile
nected together at the tops thereof by a stay shaft 20,
delivery for metal sheets a novelly arranged stationary
magnet means for receiving, guiding and suspending suc 30 the rear uprights 16 are connected together at the tops
. thereof by a stay shaft 21, and at vertically spaced points
cessive sheets of metal in a substantially horizontal path
below the belt roller shaft 14 by cross members 22 and
of movement into the space over the piling position and
23.
simultaneously causing the forward speed of said sheets
The belts 12 are continuously driven to advance the
to be decelerated whereupon said sheets will fall ?atwise
35 sheets of tin plate at a high rate of speed in a continuous—
one on top of the other.
ly moving procession from the baking over and/or turn
A further object of the invention is to provide in a
over unit to the pile delivery 11, and said operation may
pile delivery for sheets of metal or other material a novel
be effected, as desired, directly from said unit or from
sheet jogging means for limiting the forward movement
a separate source of power, such as an electric motor
of each sheet and accurately aligning the successive sheets
as they are piled so as to form an even pile thereon.
A still further object is to provide in a pile delivery
40
carried by the pile delivery frame and connected by suitable known means with the belt roller shaft 14.
If desired, advancing rollers and cooperating pressure
rollers may be located at the discharge end of conveyor
ging wherein said apparatus is rhythmically returned to
10 in the same manner as disclosed in vUnited States
a starting position after each actuation.
A still further object is to provide in a pile delivery 45 Patent No. 2,626,800, granted Ian. 27, 1953, to George
for sheets of metal or other material a novel sheet jog
for metal sheets a novel magnet means located in the
A. Martin, to further advance and guide the sheet as it
downward path of sheets being delivered to a piling posi
tion to prevent the corner portions of said sheets from
bending downwardly and marring the upper surface of a
preceding delivered and piled sheet.
The above and further objects and novel features of
leaves the endless conveyor.
,
In accordance with one aspect of the present invention,
magnetic slow-down and supporting devices of novel con~
struction are provided in the space over the piling posi-'
tion for the creating of magnetic ?elds to cause the sheet
as it leaves the endless conveyor at a high rate of speed
the present invention will more fully appear from the
to be decelerated and at the same time to move forward
following detail description when the same is read in
in a substantially horizontal plane into space until ap
connection with the accompanying drawings. It is to be
expressly understood, however, that the drawings are not 55 proximately the entire sheet is disposed over the piling
position. In this manner, the successive sheets are ad
intended as a de?nition of the limits of the invention.
vanced under positive control to piling position, each suc
In the drawings, wherein like reference characters
refer to like parts throughout the several views,
ceeding sheet is decelerated, supported and suspended in
FIG. 1 is a vertical logitudinal sectional view of a
space so that all surfaces of each sheet are free from
sheet delivery embodying the present invention and in
cluding a pile elevator, and
FIG. 2 is an enlarged vertical longitudinal sectional
contact with anything and is prevented from dragging
view of one of the front sheet jogging devices and the
slow-down magnets as shown in FIG. 1, certain of the
fall ?atwise on the top of the pile.
along and marring the upper surfaces of a preceding
delivered sheet, and upon reaching the pile will bodily
As shown in the drawings, the magnetic slow-down and
parts having portions broken away for purposes of clearer 65 supporting means comprises a plurality of permanently
magnetized horseshoe-shaped magnets 24, 25 and 26. A
illustration.
lead-in magnet 24 is mounted adjacent the discharge end
Referring to the drawings, there is shown one form
of conveyor 10 and slow-down magnets 25, 26 are
of a high speed sheet delivery apparatus embodying the
mounted forwardly thereof. Magnet 24 with its open
present invention which is particularly adapted for slow
ing down and piling sheets of tin plate as the same are 70 ends pointing downwardly is suitably secured to a ver—
tically extending bracket ‘28 which is mounted at its upper‘
delivered to said apparatus at a speed of approximately
end ‘for vertical adjustment in slot 33 of block 27 and
120450 sheets per minute from a combined drying or
3,032,340
3
4
.
secured in adjusted position by a set screw 31. Block .27
is slidably mounted on parallel shafts 29 and 30 WhlCh
are secured at their opposite ends to the side members
18 of the delivery frame. The block 27 and the magnet
bar 49 in a spaced apart position to each other with the
adjacent poles of each magnet being unlike poles so that
a further magnetic ?eld 55 is created ‘between said mag
nets. Magnetic ?elds 54, 55 and 56 extend downwardly
into and through the horizontal path of movement of
24 carried thereby are therefore adjustable horizontally
from side to side along the shafts 29, 30 and may be
the sheet and present a magnetic?eld of a greater inten
secured in any desired position of adjustment thereon
sity than magnetic ?eld 53.’ Magnetic ?elds 54, 55 and
by set screws 32.
56, however, are not of suf‘?cient intensity to pull the
As herein shown, the slow-down magnets 25, 26 are
sheet into physical contact with said magnets or to hold
supported on an auxiliary frame comprising side mem 10 the entire weight of the sheet against the downward pull
‘bers 34 and front parallel cross members 35, 36. Cross
of gravity. As the trailing edge of the sheet leaves the
members 35, 36 are secured to brackets 37 slidablY
conveyor, the leading edge thereof enters into the mag
mounted on the side members 34. Cross member 36 also
netic ?elds 54, 55 and 56 and is lifted upward and sus
supports sheet jogging devices hereinafter to be described
pended in space by magnets 25, 26 and, at the same time,
in detail. The cross members 35, 36 and the magnets 15 the intensity of these magnetic ?elds will cause its for
25, 26 together with the sheet jogging devices carried
ward horizontal speed to be decreased. As the leading
thereby are therefore adjustable rearwardly and forwardly
portion of the sheet enters the magnetic ?elds 54, 55
along the side members 34 and may be secured in any
and 56, the weight thereof will overcome the magnetic
desired position of adjustment thereon by set screws 38
in?uence of lead-in magnet 24 at the trailing edge there
which are threadedly secured in brackets 37.
The aux
iliary frame is pivotally mounted at the rear thereof, as
indicated at 39. The auxiliary frame is supported at
the front thereof by laterally projecting brackets 41 se
cured in the front uprights 17. It will be noted that the
of causing said trailing edge to be pulled downwardly by
gravity. Since magnetic ?elds 54, 55 and 56 will not
support the entire weight of the sheet, it will be peeled
downwardly away from said magnetic ?elds as the trail
ing edge thereof falls. As the trailing edge of the sheet
pivotal mounting of the auxiliary frame enables said 25 falls downwardly and out of the magnetic ?eld 53, the
frame with the front magnets and the sheet jogging de
leading edge of the succeeding sheet enters into said mag
vices carried thereby to yield upwardly in the event the
netic ?eld and the above described cycle is repeated, giv
elevator of the pile support mechanism, to be hereinafter
ing in effect a shingling of successive sheets in space. The
described, is accidently raised too high, thus preventing
entire forward speed of the sheet'is not absorbed by the
damage to the sheet jogging devices through engagement 30 magnetic ?elds 54, 55 and 56 with the result that each
of the pile supporting platform therewith. The front mag
sheet continues to travel forward for a relatively short
nets 25, 26 are supported by a bracket 42 comprising a
distance at the same time that it is being peeled away
vertically extending portion 43 and a horizontally extend
from said magnetic ?elds until the leading edge thereof
ing portion 44. Bracket 42 is movably supported on
strikes the front sheet joggers 60. As each sheet is fed
parallel cross members 35, 36 and said bracket together 35 into the space over the piled sheets at a high rate of
with the magnets 25, 26 carried thereby are therefore ad
speed, it is ‘directed by and subjected to the following com
justable horizontally from side to side along the cross
posite forces. First, the leading edge of the sheet is
members 35, 36 and may be secured in any desired posi
pulled upwardly 1by the magnetic ‘force of lead-in mag
tion of adjustment thereon by the use of suitable set
net 24 which redirects the sheet into a substantially hori
screws threadedly engaged through the upper portion of 40 zontal and suspended path of movement. As the lead
said bracket and into cross member 35. Magnets 25, 26
ing edge of the sheet horizontally moves into the magnetic
with their open ends pointed downwardly are secured at
?elds of magnets 25, 26, the'sheet is temporarily sup
their top portions to a bar 49 which is suitably secured
ported and suspended in space and is decelerated by said’
for example ‘by ‘bolts, to two longitudinally spaced ver
magnetic ?elds. Simultaneously with the action of mag
tically extending ‘bars 50 the upper ends of which are
nets 25, 26 on the leading portion of the sheet, its trailing
adapted to ?t into apertures 51 in horizontal portion 44
edge has started to drop downward away from magnet
of bracket 42. Bar 49 has a series of horizontal aper
tures to permit bars 50 to be bolted thereto at several
24 so that the sheet moves forward for a relatively short
distance at an inclined angle which further tends to de
horizontally adjusted positions on said plate. Bars 50
celerate the sheet 'by air friction on the underside of said
are vertically adjustably secured in apertures 51 by set
sheet and a slight compression of air beneath said sheet.
screws 52‘. Additionally, a series of vertically extending 50 The forward movement of said sheet is not completely
apertures in bar 49 permit the magnets 25, 26 to be
decelerated as the leading edge of the sheet strikes the
mounted on bar 49 at a variety of positions in relation
front sheet joggers 60 which causes the forward movement
to each other.
to stop whereby the sheet falls ?atwise ‘by gravity a short
distance onto a pile.
"‘
Suitable shields 88, 89 are placed over the open ends
of magnets 24, 25 and 26 to redirect a sheet should it 55
As shown in FIG. 1, the pile of delivered sheets is re
accidently be misdirected out of its‘ normal horizontal
movably supported on a pile elevator of the type dis
path of movement.
'
closed in the above-mentioned US. Pat. No. 2,626,800.
As the sheet leaves the conveyor 11}, it travelsforward
The pile is lowered stepaby-step to maintain the top there
into space and its leading edge would normally tend to
of at a selected minimum distance below magnets 24, 25
dip downwardly as shown by C in FIG. 1. Lead-in 60 and 26, and this is accomplished by a ratchet 1th) driv
magnet 24 is mounted adjacent the end of the conveyor
ably connected with the elevator and an oscillating pawl
10 and slightly above the horizontal path of movement
99 engaged with said ratchet. The operation of thepawl
of the sheet and has a magnetic ?eld 53 which extends
and ratchet drive 99, 100 is controlled by a solenoid 117
downwardly and through said path. As the leading edge
which is operatively associated with a pawl cont-rolling
of the sheet enters into said magnetic ?eld the lead-in 65 mask 122 to normally hold the pawl 99 out‘ of opera
magnet will attract said sheet and lift it su?iciently against
tive connection with the ratchet 106. Solenoid 117 is, in
the pull of gravity to keep it in a substantially horizontal
turn, oper'atively controlled by a switch which, in turn‘,
and suspended path of movement. However, the magnet
is controlled by a movable arm 196 having mounted
is so spaced that its magnetic ?eld 53 is not strong enough
thereon a swingable lever 107 which lever is disposed
to lift the sheet any more than to keep it in a straight 70 inoperative relation to the top of the pile of sheets‘ on
horizontal path. Each of slow-down magnets 25, 26 like
the elevator. The construction and operation of pawl
magnet 24- are horseshoe or U-shaped in cross section
and ratchet drive 99, 100 is similar'to and is described
and each has a north and south pole, indicated at N and
in more detail in the above-mentioned US. Pat. No.
S with magnetic fields 54, 56, respectively, extending be
2,626,800. When the top of the pile of sheets is at
tween said unlike poles. Said magnets are mounted'on
a normal level below the‘ swingable lever 107, the arm
‘3,032,340
a:
U
106 will not actuate solenoid 117 and the oscillating pawl
99 is held out of engagement with the ratchet 106 by
‘the mask 122 and no downward movement will be im
ported to said pile. As the delivered sheets drop one
after ‘another on the pile, the latter thereby progressively
increases and the lever 107 is prevented from pivotally
swinging on arm 106 by said piled sheets, whereupon
6
cut. Plate 63 is weighted by a weight 73 which is ad
justably secured to a pin 74 that is, in turn, secured to
the end of plate 63.
In the initial operation of the pile delivery, the de
scribed front sheet joggers 6f! are allowed to freely ex
tend vertically downward and are moved along the side
members 34 until the front surface of cushion 72 is
spaced
‘from plate 46 a distance equal to the length of
the arm 106 is moved to actuate the switch and the sole
a sheet to be piled. Joggers 60 are adjusted, along
noid 117. The actuated solenoid in turn acts upon the
pawl mask 122 to enable engagement of the pawl 99 10 cross member 34, ‘for the width of the sheet being fed
and the desired spacing of the joggers along that width.
with the ratchet 100 to rotate the latter and thereby
Accordingly, as each sheet is fed into the space over
effect downward movement of the pile thereon until the
the pile support it is directed, supported and slowed
top of said pile again reaches a level below lever 107.
down by the magnets 24, 25 and 26 as hereinbefore de
Disposed slightly forward of rollers 13 and supported
scribed, and the front edge of said sheet strikes the
15
on cross members 22, 23 of the delivery frame by means
cushion 72, thus checking the sheet against further for
of forwardly extending bars 45, is a vertically extending
ward movement. Cushion 72 prevents damage to the
metal plate 46 against which the successively delivered
front edge of the sheet as it strikes said joggers. The
sheets are jogged as hereinafter described, and against
force of the sheet striking against cushion 72 will force
which the rear edge of the pile of delivered sheets bears
the lower end of plate 62 to pivotally move forward
during lowering of said pile and the elevator as herein
against the resilient force of spring 71 which will be come
before described. Suitably secured to the upper end of
compressed and transmit the force to the lower end of
plate 46 are three vertically extending guides 47 having
plate 63 which, in turn, will pivotally move forward as
the inner edges thereof aligned with the inner surface
it absorbs the force transmitted to it. The shock ab
of said plate and constituting an extension thereof. The
sorbing force of plate 63 can be increased as desired
upper ends of guides 47 have inwardly inclined surfaces
by moving weight 73 outwardly along pin 74 away from
48 whereby as the sheets fall downwardly the rear edge
said plate. The ‘force of the sheet striking jogger 60
thereof is guided into alignment with the inner surfaces
is thus absorbed by plates 62, 63 with a minimum of
of plate 46 against which they are jogged into ‘an evenly
movement of said plates and the compressed spring 71
stacked pile of sheets.
will return plate 62 to its vertical position where it will
‘In accordance with another aspect of the invention,
receive the impact of a succeeding sheet of a series being
sheet jogging devices of novel construction and opera
rapidly fed from conveyor 10. As the sheet is peeled
tion are provided to cause the successive sheets upon de
away from the magnetic ?elds of slow-down magnets 25,
livery thereof to the previously piled sheets to pile evenly
26, it will drop ?atwise toward the pile along the pile
thereon without relative sliding movement. In the illus
guide 46 onto the pile and to a ?nal position thereon
trated embodiment four sheet jogging devices, indicated 35 with its rear edge engaged with the pile guide 46 and its
generally at 60, are employed at the front of the delivery
front edge alinged with the front edges of the previ
and are identical in construction, mounting and oper
ously delivered and piled sheets. Thus, each sheet is de
ation, therefore a description of one of said front jogging
posited on the pile without sliding forwardly or rear
devices will be sufficient for an understanding of the
wardly relative to the previously delivered underlying
operation and function of all.
sheet and an even piling of sheets is obtained.
As herein shown, the front sheet jogging devices 60
A plurality of front joggers 60, each freely and inde
are supported on the auxiliary frame described above in
pendently mounted, are used with four having been found
connection with the support for the slow-down magnets
to work satisfactorily at the high speed operation of this
25, 26. In FIGS. 1 and 2 of the drawings, each front
embodiment, although more or fewer joggers may be
sheet jogging device 60 comprises a front plate 62 and a
satisfactorily used with higher or lower speeds and/or
rear plate 63 both of which are supported by and depend 45 with differing sizes of sheets to be piled. In the use of
downwardly from a bifurcated collar 64 which is loosely
four front joggers a satisfactory operation is obtained by
mounted for pivotal movement on the cross member 36.
positioning two joggers side by side on each side of the
Bifurcated collar 64 has a downwardly projecting leg 65
leading edge of a sheet. In the operation of said jogger
and a horizontally projecting leg 66 positioned at right
arrangement, the two inside joggers swing in unison and
angles to leg 65. The upper end of plate 63 is suitably
the
two outside joggers swing in unison which is out of
secured to leg 65. The upper end of plate 62 is secured
phase
with the motion of the ?rst set of joggers. Conse
to the end of leg 66 by a hinge 67, said hinge permitting
quently, as one set of joggers is moving away from the
plate 62 to pivotally swing from its normally vertically
pile of sheets and absorbing the impact of a delivered
position toward plate 63. Plates 62, 63 are thus pivot
sheet, the other set is moving back to substantially ver
ally mounted from their upper ends from the same sup
tical position in which position it is ready to absorb the
port and when at rest depend substantially vertically
downward and parallel to each other. Loosely mounted
bifurcated collar 64 and plates 62, 63 are adjustable along
impact of the next succeeding delivered sheet. Thus,
there is a rhythmic operation of the front joggers whereby
at least one jogger on each side of the sheet is in a sub—
cross member 36 and may be secured in any desired posi—
tion of adjustment thereon by a thumb screw 68 which 60 stantially vertical position to absorb the impact of each
successively rapidly fed sheet. As each jogger returns to
is threaded into a collar 69 engaged over said cross
its
vertical position under the force of compressed spring
member and disposed between the forked arms of collar
71, the cushion 72 will strike the leading edge of a sheet
64. Collar 64 is provided with a pin 70 adapted to en
which is falling in space and before that sheet reaches the
gage leg 66 as and for a purpose to be hereinaf‘er de
scribed. The lower ends of plates 62 and 63 are resilient 65 pile, thus effecting a jogging of each sheet in space and
against the pile guide 46. It is also to be noted that as
ly connected by a spring 71. The vertical dimensions
plate 62 returns to its vertical position the lower end of
of plates 62, 63 are such that they extend a short dis
cushion 72 thereon strikes the top portion of the pre
tance below the normal level of the top of the pile
viously piled sheets to impart a rearward tap or thrust
of sheets. Extending along the front surface of plate
62 from the lower end to a point substantially above 70 to said sheets whereby engagement of the same with the
guide 46 and an even piling thereof is further assured.
the horizontal path of movement of a sheet from the
This novel construction and arrangement of front sheet
conveyor is an energy absorbing cushion 72 comprising,
joggers prevents said joggers from swinging excessively
for example, a pad of ensolite, type 22226, manufactured
when struck by a forward moving sheet and assures that
by U.S. Rubber Company and covered with a sheet of
neoprene “Monarch” is protect the ensolite from being 75 they will be returned to the vertical position in time to
3,082,340
7
8
absorb the impact of a succeeding sheet and also assures
that a jogger Will be in proper position to absorb the im
While the present invention is herein illustrated. and
described in connection with the receiving and piling of
pact from a series of successively fed sheets.
metal sheets as the same are discharged from a combined
When replacing a full load with a new pile support, it
is necessary to move front sheet joggers 60 forwardly and
upwardly to obtain the proper clearance. To enable all
drying oven and sheet turnover unit, it is equally adapted
for the receiving and piling of metal sheets discharged
from various other instrumentalities acting on such sheets.
of sheet joggers 60 to be moved simultaneously, a lever
arm 84 is ?xedly secured to cross member 36. As the
Moreover, the sheet jogging means is equally adaptable
suitably mounted on the same side of arm 84 as plate 85
tion as will now be clear to those skilled in the art.
for the limiting of the forward movement and piling of
lever arm is lifted upwardly, the cross member 36 and
sheets of non-magnetic character, such as cardboard and
adjustably secured collar 69 are rotated causing pins 70 10 other sheets of similar relatively stiff non-metallic mate
to engage and move leg 66 of bifurcated collars 64, thus
rial which are fed substantially horizontally forward into
causing all of the joggers 60v to be simultaneously moved
the space above the piling position.
forwardly and upwardly. A plate 85 having a notch 85
Various changes may be made in the design and ar
at its lower front surface is ?xedly mounted adjacent the
rangement of the parts of the illustrated embodiment
upper end of lever arm 84. A spring biased pin 87 is 15 without departing from the spirit and scope of the inven
with said pin resiliently urged against the lower surface
It is
therefore to be expressly understood that the present in
of the plate. Thus, as lever arm 84 is pivoted upwardly,
vention is not limited to the particular embodiment there
pin 87 will be forced into engagement with notch 86
of herein illustrated and described.
thereby locking arm 84 and joggers 68 in said upward 20
What is claimed is:
position. Pin 87 may be manually retracted from notch
1. The method of delivering metal sheets to a pile
86, thus allowing joggers 60 to return to the operative
support comprising the steps of feeding sheets one after
position.
another generally horizontally into the space over said
In accordance with another aspect of this invention,
support, redirecting the leading edge of each sheet as
side magnet devices of novel construction are provided to
it enters into said space into a generally horizontal path,
prevent the corners of the leading edge of each sheet from
temporarily supporting the forward portion of each sheet
bending downwardly as each sheet is delivered to the pile
in said space to maintain each sheet in a freely ?oating
of sheets. In the illustrated embodiment two side magnet
and generally horizontal path of movement and simul
devices are employed, one on each side of the sheet.
taneously with said supporting causing the forward speed
Since both side magnet devices are identical in construc 30 of each sheet to be decelerated, causing the rear portion
tion, mounting and operation, a description of one will be
of each sheet to fall downwardly as it is fed into said
suf?cent for an understanding of the operation and func
space whereby the entire sheet will be pulled downwardly
tion of both. Referring now to FIG. 1 of the drawings,
by gravity, completely stopping all forward motion of
each of the side magnet devices 62 comprises a vertically
each sheet when the same is completely over the pile
extending permanent magnet 75 which is U-shaped in 35 support whereby each sheet will fall downwardly to a
top plan view or horizontal cross section, thereby form
ing north and south poles which are transversely spaced
piling position, and ‘feeding a succeeding sheet into said
with respect to the vertical movement of ‘the pile of sheets
whereby a magnetic ?eld horizontally extends into the
is pulled downwardly by gravity to thereby effect a
space as soon as the rear portion of the preceding sheet
shingling of sheets in space with the surfaces of each
downward path of the sheets being delivered to said pile. 40 sheet free of contact with anything until it reaches the
A vertically extending cover plate 76 having an inwardly
piling position.
inclined surface at the upper end and sides thereof is
suitably secured across the open end of said magnet. A
2. In a sheet delivery apparatus the combination of
vertically extending support bar 77 is suitably secured at
a support for a pile of metal sheets, means to- convey
metal sheets one after another into the space over said
its lower end to the rear of magnet 75 and supported and
guided at its upper end for ?oating movement in vertical
support, a ?rst magnet positioned adjacent said conveyor
means and having a magnetic ?eld extending down
and horizontal directions on horizontally disposed bracket
78. Bracket 78 is adjustably secured to cross member 35
by bolts 79 whereby each side magnet device may be ad
justed for the width of the sheet being piled. A U-shaped .
plate 80 is bolted to the side of bracket 78 to provide a
suitable slot 81 to slidably receive the upper end of mag
not support bar 77. A series of apertures 82 in bracket
78 permits plate 86 to be bolted thereto at various places
whereby forward and rearward adjustment of the sup
port bar 77 on said bracket is possible. A pin 83 at the
upper end ‘of bar '77 limits its downward movement in slot
81. A plurality of apertures in support bar 77 permits
pin 83 to hold said magnets at any desired vertical posi
tion. Side magnet devices 61 magnetically attract the
outer corners of. the leading edge of the sheet as it falls
downwardly'past said magnets. In a ?exible 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 sheet and mar it.
Side magnet devices 61, however, will magnetically attract
these outer corners and as‘ the sheet falls downwardly
said outer corners will‘be straightened out thus prevent~
ing said corners from striking and marring the upper sur
face of the preceding sheet. The side magnet devices can 70
be mounted on or be used in cooperation with sheet side
joggers of the type disclosed in the above-mentioned
US. Patent No. 2,626,800 or with other types of sheet
side joggers, or they can be. mounted independently as
shown in the embodiment.
wardly into and through the sheet path to lift the lead
ing edge of each sheet but not to support the entire
weight thereof against the pull of gravity and to direct
it into a generally horizontal path of movement in said
space, a second magnet positioned forwardly of said
?rst magnet and having a magnetic field of greater in
tensity than said ?rst magnet extending downwardly into
and through the path of each sheet in said path. and
adapted to temporarily suspend the leading portion of
each sheet but not to support the entire weight of each
sheet and to decelerate the forward speed thereof, where
by each sheet will be pulled downwardly by gravity and
fall ?atwise on said pile support.
3. In a sheet delivery apparatus as de?ned in claim 2
comprising means located adjacent the downward path
of movement of the sheet to prevent the corners of the
leading edge of each sheet from drooping as each sheet
moves downwardly to the delivered position on said
pile support.
.
4. A sheet delivery. apparatus comprising a support
for a pile of metal sheets, means to convey a plurality
of metal sheets in succession into the space over said
support, a first magnet positioned adjacent the entry of
each sheet into said space and having a magnetic ?eld
extending downwardly into and through the entrance
path of said sheet and having an intensity su?icient to
lift the leading edge but not to support the entire weight
of each sheet thereby redirecting each sheet into a gen
75 erally horizontal and freely ?oating path of movement,
3,032,340
a second magnet positioned forwardly of said ?rst magnet
and having a magnetic ?eld extending downwardly into
and through the path of forward movement of each
sheet, said second magnet having a greater intensity than
said ?rst magnet and adapted to temporarily suspend
the leading portion of each sheet in said freely ?oating
path but not to support the entire weight of the sheet
and to decelerate the forward speed of each sheet.
5. A sheet delivery apparatus comprising a support
10
into the sheet path whereby as each sheet falls down
wardly past said magnets the downward movement of
the outer edges thereof is retarded to straighten out the
sheet as it is falling.
8. A sheet delivery apparatus comprising a support for
a pile of sheets, means adjacent said pile support to con
vey a plurality of ‘sheets one after another into the
space over said support, a ?rst means providing a vertical
supporting force on the leading portion of each sheet
for a pile ‘of metal sheets, means to convey a plurality 10 and positioned adjacent said conveyor means and above
the path of sheets into said space and extending down
of metal sheets in succession into the space over said
wardly into and through said sheet path, said ?rst means
support, a ?rst means providing an attractive force ex
counterbalancing the pull of gravity ‘on the leading por
tending downwardly into and through said sheet path
tion of each sheet as it enters into said space and direct
and located adjacent said conveyor means and above
ing each sheet into a generally horizontal and freely
said space, said ?rst means counterbalancing the pull
suspended path through said space, a second means
of gravity on the leading portion of each sheet as it
spaced from said ?rst means, said second means posi
enters into said space and directing each sheet into a
tioned above said sheet path and providing a vertical sup
generally horizontal and freely suspended path through
porting ‘and lateral braking force on each sheet and ex
said space, a second means providing an attractive force
of greater intensity than said ?rst means and extending 20 tending downwardly into and through said sheet path and
operable only on the leading portion of each sheet as
downwardly into and through said sheet path and coun
the same moves into the forward portion of said space
terbalancing the pull of gravity on only the leading por
whereby as each sheet moves into said space the forward
tion of each sheet as it freely moves into said space to
speed thereof is decelerated and the pull of gravity on the
cause the forward speed of each sheet to be decelerated
whereby as each sheet moves into said space the hori 25 entire sheet overcomes said ?rst and second means and
zontal speed thereof is decelerated and the pull of grav
ity 0n the entire sheet overcomes said ?rst and second
means.
the sheet falls downwardly onto said pile support.
9. A delivery apparatus comprising a support for a
pile of metal sheets, means for carrying sheets one after
6. A sheet delivery apparatus comprising a support
another generally horizontally forward into the space
tending into and through said sheet path and located
adjacent said conveyor means, said ?rst means counter
tending downwardly into and through the path of said
sheet for temporarily supporting and decelerating the
each sheet as it enters into said space and directing each
tion ‘free from contact with any object whereby the pull
sheet into a generally horizontal and freely suspended
of gravity will cause the rear portion of each sheet to
path through said space, a second means spaced from
said ?rst means and providing a magnetic supporting
fall downwardly toward said pile support.
for a pile of sheets, means to convey a plurality of 30 over said support, magnetic means located above said pile
support and above the forward portion of the path of
sheets in succession into the space over said support, a
each sheet in said space and having a magnetic ?eld ex
?rst means providing a magnetic supporting force ex
balancing the pull of gravity on the leading portion of 35 leading portion of each sheet while maintaining said por
force extending into and through said sheet path and
counterbalancing the pull of gravity on only the leading
portion of each sheet as it freely moves into said space
and to cause the forward speed of each sheet to be de
celerated whereby as each sheet moves into said space
the horizontal speed thereof is decelerated and the pull 45
of gravity on the entire sheet overcomes said ?rst and
second means.
7. In a sheet delivery apparatus as set forth in claim 3,
wherein said last-mentioned means comprises a magnet
element on each side of said path and each of said ele 50
ments having a magnetic ?eld extending horizontally
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,261,972
2,332,863
2,374,174
2,517,388
2,566,240
2,596,448
2,626,800
2,733,064
Matthews __________ __ Nov. 11, 1941
Luehrs ______________ __ Oct. 26, 1943
Buccicone __________ __ Apr. 24,
Daves _______________ __ Aug. 1,
Mursch _____________ __ Aug. 28,
Toronto ______________ _ May 13,
1945
1950
1951
1952
Martin _____________ __ Jan. 27, 1953
Martin _____________ _... Jan. 31, 1956
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