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Патент USA US3079159

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Feb. 26, 1963
vF'iled March 18, 1960
4 Sheets-Sheet 2
‘3%), r'élilzlamiy
Feb. 26, 1963
Filed March 18, 1960
4' Sheets-Sheet 3
Feb. 26, 1963
Filed March 18, 1960
4 Sheets-Sheet 4
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JO/M/ 1”. 10/752
United States Patent 0
Patented Feb. 26, 1963
John P. Lopez, West?eld, N..l., assignor to Universal
Corrugated Box Machinery Corporation, a corporation
of New Jersey
Filed Mar. 18, 1960, Ser. No. 16,005
3 Claims. (Cl. 271—69)
tinuously driven endless belt conveyor 11 on which the
sheets, which may be of corrugated paper board, are dis
charged to be advanced thereby. The conveyor 11 has
an associated gate 12 extending transversely thereacross
and an intermittently driven transfer conveyor 13 lies in
a horizontal plane below that of the upper run 14 of con
veyor 11 and is designed to advance the sheets discharged
thereon in direction at right angles to the direction of feed
of the conveyor 11.
This invention relates to the art of sheet conveying, 10
The conveyor 11 will receive the sheets from any suita
stacking and delivering equipment, and more particularly
ble source which, when the sheets are in the form of
to an equipment for forming uniform stacks from substan
folded box blanks, could be a folding machine, and will
tially rigid sheets successively discharged onto an inter
mittently driven conveyor.
discharge them onto the conveyor 13 to form a stack con
taining a preselected number of sheets and the stack will
As conducive to an understanding of the invention, it 15 then
be moved by the conveyor 13 to a take-off point.
is noted that where an equipment is provided such as of
shown in FIG. 1, the conveyor 13 desirably com
the type shown in Patent No. 2,506,550, in which sheets
prises a substantially rectangular frame, which has parallel
are successively discharged from a feeding conveyor onto
side and end beams 16 and 17. Rotatably mounted be
a transfer conveyor and thereupon advanced by said trans
fer conveyor in direction at right angles to the direction 20 tween the side beams 16 are a plurality of spaced parallel
rollers 18, which may be driven in the same direction in
of discharge thereon, in order for the sheets to be dis
any suitable manner such as shown in said Patent No.
charged onto the transfer conveyor without jamming it is
necessary that the backstop against which the sheets abut
A?ixed to the side beam 16 adjacent the outlet end of
as they are discharged be sufficiently spaced from the
conveyor 11, and rising therefrom, is a vertical backing
discharge end of the feeding conveyor.
25 plate 19, which extends longitudinally of said conveyor 13
If the distance between the backstop and such dis
and the upper edge 21 of which is in a plane below the
charge end is too small, then the sheets will jam, and if
plane of the upper run 14 of conveyor 11. The lower
the distance is too great the resultant stack built up will
edge of the backing plate 19 is desirably notched as at 20
be irregular, with the result that when the stack is sub
to accommodate the rollers 18.
sequently advanced by the transfer conveyor it will be 30
Desirably, an idler roller 22 is positioned between the
dit?cult for a workman to handle the same. This is
discharge end of conveyor 11 and the upper edge 21 of
especially so if the stack is to be tied up into bundles, for
backing plate 19, and rising slightly above said upper edge
if one or more of the sheets should jut out from the main
21, to insure that the sheets discharged from conveyor
body of the stack, the stack must either be reassembled,
11 will not jam against the backing plate.
with attendant loss of time, or if the irregular stack is 35
According to the invention, an oscillating backstop
merely tied, the jutting sheets may be broken.
assembly 23 is associated with the conveyor 13. Referring
It is accordingly among the objects of the invention to
to FIGS. 1 and 6, the backstop assembly 23 comprises a
provide a backstop for a transfer conveyor of the above
pair of upstanding standards 24 straddling the end beams
type, which is relatively simple in construction and not
17 of the frame.
likely to become deranged even with long use, and may 40
Secured to the inner surface of each of the standards is
readily be adjusted depending upon the dimensions of the
a bracket 25 which has an inwardly extending horizontal
sheets to be stacked, and which will provide adequate
ledge 26 at its upper end. Secured to the ledges 26 are
space with respect to the discharge end of the feeding
the respective ends of a Z-shapcd beam 27 which extends
conveyor so that sheets may be discharged onto the trans
fer conveyor without likelihood of jamming, yet will 45 transversely over the rollers 18. A second L-shaped beam
28 positioned beneath beam 27 also extends transversely
form even and uniform stacks of sheets on such transfer
over the rollers 18, being secured at its ends to the
standards 24», said two beams 27 and 28 and said standards
According to the invention, these objects are accom
24 thus forming a rigid assembly.
plished by the arrangement and combination of elements
Means are provided movably to mount the
hereinafter described and more particularly recited in
assembly 23 on the beams 17 so as to be movablebackstop
the claims.
and away from ‘the discharge end of conveyor 11..
In the accompanying drawings in which is shown one
or more of various possible embodiments of the several
features of the invention,
FIG. 1 is a perspective view of the equipment,
FIG. 2 is a sectional view taken along line 2-2 of
FIG. 1,
FIG. 3 is a View taken along line 3—3 of FIG. 2,
FIG. 4 is a view taken along line 4—4 of FIG. 1 with
parts broken away,
FIG. 5 is a sectional view taken along line 6-6 of
FIG. 4,
FIG. 6 is a sectional view taken along line 6—6 of
FIG. 4, and
FIG. 7 is a sectional view taken along line 7-7 of
FIG. 4.
Referring now to the drawings, the backstop is especially
adaptable for use with a conveyor, stacking and deliver
ing equipment of the general type shown and described in
Patent No. 2,506,550 dated May 2, 1950.
As shown in FIG. 1, such equipment comprises a con
a stud shaft 34 and
tatably mounting a stud shaft 35.
Rotatably mounted on the stud shafts 34 and 36 on
the inner side of the associated standard is a roller 37
and a sprocket Wheel 33. The rollers 37 each have a
of end beams 17.
The stud shaft 35 on its inner end mounts a sprocket
wheel 43 and on its outer end mounts a drive sprocket
wheel 44.
Extending longitudinally ‘of each of the end beams #17
‘and secured to the ends thereof is a sprocket chain v45
which, as shown in FIG. 4, rides over sprocket wheels
38 on stud shafts 34 and 36 and under sprocket wheel 43.
Means are provided to effect simultaneous notation of
70 sprocket wheels 44 to effect rotation of sprocket wheels
43 and hence movement of the backstop assembly along
end beams 17.
To this end, each of the standards 24 on its outer
surface mounts a bearing block 47 which notatably
mounts a shaft 48 that extends transversely across the
rollers 18, being supported between its ends on bearings
49 mounted on'brackets 51 depending from'the hori
zontal leg 52 of beam 27. The ends of the shaft'48 each
mount a sprocket wheel 5-4, connected by sprocket chain
55 to the sprocket wheel 44, and one end of the shaft 48
will be formed that may readily be handled by a workman.
As the operation of the equipment may be automati
cally controlled by suitable timing circuits such as shown
in said Patent No. 2,506,550 and which would be readily
apparent to one skilled in the art, and as such circuits
tonrn no part of this invention, they will not be described.
As many changes could be made in the above con
stnuction, and many apparently widely di?erent embodi
ments of this invention could be made without departing
mounts a crank 56 to facilitate rotation of said sh?t.
Desirably, ‘a housing 57 is secured to the outer surface 10 from the scope of the claims, it is intended that ‘all matter
of each of the standards to cover the sprocket wheels 4-4
and 54 and the sprocket chain 55.
A?ixed to each of the ends of the upper beam 27 and
also to substantially the center thereof, and extending
beyond said beam 27 toward the backing plate 19, are
parallel plates 61, 62 and 63, which have associated bear
ings 64 rotatably to mount a horizontal rod 66, said rod
lying in a plane below the plane of the horizontal leg
67 of beam 27. Pivotally mounted on the rod 66 adja
contained in the above description or shown in the ac
companying drawings shall be interpreted as illustrative
and not in a limiting sense.
Having thus described my invention, what I claim as
new and desire to secure by Letters Patent of the United
States is:
1. Equipment for forming stacks of sheet material com
prising a normally stationary transfer conveyor, 21 feed~
ing conveyor having a discharge end, ‘said feeding con
cent each of its ends is an arm 68 and a pair of arms 69 20 veyor extending at right angles to said transfer conveyor
successively to discharge said sheets thereon, means to
‘are pivotally mounted on said rod adjacent the plate 62.
interrupt discharge of sheets from said feeding conveyor
The arms s3 and ‘69 are secured as by welding to the
onto said transfer conveyor, a backing member extending
rear of a substantially rectangular backstop plate 71
which, as shown in FIG. 1, extends parallel to the side
longitudinally of said transferrconveyor adjacent the dis
beams 16 of the frame and has a plurality of notches '72 25 charge end of said feeding conveyor and below the hori
zontal plane of the latter, a backstop extending longitu
in its lower edge to accommodate the rollers 18'.
dinally of said transfer conveyor and transversely spaced
Means are provided to oscillate said backstop plate
from the backing member so that at least the lower edge
71 about said rod 66. To this end, a support plate 75 is
thereof is normallylocated at -a distance ‘from said back
provided secured at one end as by welding to the beam
28 and extending outwardly therefrom in a vertical plane. 30 ing member substantially equal to the width of the stack
to be formed, said sheets being adapted to abut against
Mounted on the plate 75 is an actuator unit, illustra-v
said backstop upon discharge onto said transfer conveyor,
tively an air cylinder 76, the end of the plunger of which
and means when the discharge of sheets onto said first
has pivoted thereto one end of a link 77, the other end
conveyor is interrupted to eifect pivotal movement of said
of which is positioned between the arms 69 and pivoted
35 backstop to move the lower end thereof to :a retracted
thereto as at 78.
With the air cylinder de~energized, ‘the ‘backstop plate
position away from said predetermined position and to
71 will extend in a vertical plane and, as shown in PEG.
effect movement of said transfer conveyor to move the
stack of sheets thereon away from said discharge end in
direction at right angles to the direction of discharge onto
respect to the backing plate 19 so that the distance there
between is but slightly greater than the width of the‘ 40 said transfer conveyor.
2. The combination set vforth in claim 1 in which means
sheets to be discharged onto the conveyor 13.
are provided to e?ect oscillatory movement of said back
' When the air cylinder is energized, the backstop plate
stop in direction at right angles to the direction of move
71 will be oscillated between the forward and retracted
ment of said transfer conveyor and over a relatively small
positions shown in FIG. 2.
As sheets are successively advanced by conveyor 11, 45 range of movement as compared to the normal Spacing
2, is positioned by movement of the assembly 23 with
they will be discharged or ejected past the normally open
gate 12 and their leading edges will abut against the
oscillating backstop plate 71 which will pat the sheets
between said discharge endrand said backstop.
3. The combination set forth in claim 1 in which said
backstop comprises an elongated substantially rectangular
against the backing plate 19, forming an even stack.
plate, means are provided pivotally to mount said plate
When the stack has attained a predetermined height, 50 on an horizontal axis extending parallel to the path of
the gate 112 is closed to stop further discharge of sheets
movement of said transfer conveyor and the means to
onto the conveyor 13, and thereupon the rollers 18 are
effect movement of the backstop to said retracted posi
energized, and at the same time the air cylinder 76 is set
tion is operatively connected to said backstop and extends
to retain the backstop plate 71 in its retracted position
at right angles thereto.
shown in FIG. 2 so that the backstop plate is completely 55
References Cited in the ?le of this patent
spaced‘ from the leading edges L of the stack of sheets.
Due to the energization of the rollers 18 of the transfer
conveyor 13, the stack of sheets will be moved away
Evans et a1. ___________ ._ June 28, 1932
from the discharge end of the feeding conveyor 11' onto
,Morrison ____________ .. Aug. 12, 1952
a suitable receiving conveyor (not shown) from which, 60 2,606,669
Davis ; ______________ __ Nov. 11,_ 1952
by reason of the uniformity of the stack thus formed,
Iunco ______________ __ Nov. 9, 1954
they may readily be removed by a workman for subse
Shields ____________ _,__ Apr. 23, 1957
With the construction above described, sheets may be
Donald 7_____________ __ Dec. 17, 1957
discharged at ‘a relatively high rate of speed onto the
‘transfer conveyor 13, with assurance that a uniform stack
Russell _____________ __ Mar. 4, 1958
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