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Патент USA US3091336

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May 28, 1963
Filed March 23, 19607 1
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Patented May 28, 1963
immediate area to be engaged by the apparatus. A more
complete understanding of the invention may be gained
by reference to the following description and accom
panying drawings, which describe the apparatus as being
Francis G. Conniclr, Downers Grove, John A. Brendle,
La Grange, and Eldon .I. Strandine, Chicago, fit, as
signors to Swift & Company, Chicago, III., a corpora
tion of Illinois
Filed Mar. 23, 1960, Ser. No. 17,196
3 Claims. ((31. 198—180)
utilized in connection with a dehairing device.
In the drawings:
FIGURE 1 is a perspective view of an apparatus em
bodying the features of the present invention;
FIGURE 2 is a sectional elevation taken at 2--2 of
This invention relates to a device for securing in 10 FIG. 1 showing the positions through which the clamp
place ?exible material, and, more particularly, the inven
FIGURE 3 is a schematic side elevational view of a
tion relates to a substantially automatic app aratus especial
ly adapted to grasp, hold and release ?exible sheet ma
terial such as pelts, skins, hides, and leather or the like
while undergoing processing operations.
During the processing of ?exible sheet material it is
often necessary to secure ?exible sheet material to a par
ticular portion of a processing apparatus. ‘It is important
in many processes that the ?exible sheet be ?rmly held
in order to enable a force to be applied to some portion
of it ‘without removing the sheet from the holding means.
dehairing device, such as that of US. Patent No. 2,841,
829, incorporating the invention; and
FIGURE 4 ‘is a side elevation in section of the clamp
closed on a pelt.
In the drawings wherein like characters refer to like
parts throughout, the apparatus comprises a clamp gen
erally 16 having a rectangular recessed member gen
erally-14, comprising a base 16 and four walls 18, 19,
2t}, and 21. Preferably base 16 is provided with an open
ing 17, the purpose of which will later be made clear. At
As an example, it has been extremely di?icult to secure
least one of the longer walls 18 is formed at an acute
hides to a conveying means where the hair is to be re
angle to the base 16 to form a channel 22 as shown in
moved without the hides themselves being loosened or
removed from the conveying means. Various types of 25 FIGURES 2 and 4, for purposes which will later become
clear. The walls 13, 19, 2t) and 21 terminate in out
adhesives have been utilized to secure ?exible sheet ma
wardly bent ?ange members 24, 25, '26, and 27, respec
terial to a conveying means. However, these adhesives
tively, lying in a plane gene-rally parallel to base 16.
are di?icult to work with and many problems are en
Clamp .10 is preferably mounted transversely on a con
‘It is, therefore, an object of this invention to provide 30 veyor belt or Web 28 as shown in FIGURE 1. The clamp
is secured by cutting an opening in the conveyor belt or
an improved apparatus for mechanically securing a ?exi
ble sheet material in place.
It is a further object to provide an improved apparatus
for grasping, holding and releasing a ?exible sheet mate
web, wherein the recessed member 14 is ?tted, and fasten
ing the ?anges 24, .25, 26‘, and 27 to the belt with a plu
rality of rivet-s 36‘ (as illustrated) or other suitable fas
rial in a substantially automatic manner.
35 teners.
A further object is to provide an improved apparatus to
be capable of conveying and to substantially automati
clamp may be secured to a pair of parallel chains by
passing fasteners through the rivet holes of ?anges 25 and
26 and attaching them to the chains.
A toggle member generally 32 is hingeably connected
40 to the recessed member .14 adjacent wall 20 by means of
a pin 33. Toggle 32 comprises a hinge member ‘34 piv
otably mounted on the pin 33, and having an angular
projection 35 at one side of an edge opposite pin 33; and
a plate 36 adjacent the projection pivotably connected to
45 . the same edge of hinge member 34 (opposite pin 33) by
a second hinge pin 37. ‘It is preferred to provide a spring
38 about pin v37 between plate 36 and hinge member 34
thus urging the plate 136 toward the recessed member 14
and thereby assuring that plate 36 Will be in position to
50 engage channel 22. To close the clamp pressure is ap
plied against projection 35 to pivot the toggle 32 on pin
cally grasp, hold and release a ?exible material.
A further object is to provide an improved apparatus
for securing hides to a conveying means.
A still further object is to provide an improved ap
paratus for substantially automatically grasping, holding
and releasing a hide while the hide is on a conveying
means undergoing an unhairing operation.
Additional objects and advantages of this invention
if not speci?cally set forth will become apparent to one
skilled in the art during the course of the following de
The present apparatus comprises a clamp having a
recessed body member mounted on a supporting means,
a hinge member mounted along one side of the recessed
member and a plate pivotally attached to the hinge mem
Where a chain-type conveyor is utilized the
33. ‘If desired, the leading unhinged edge 39 of plate 36
may be serrated or coated with rubber or plastic to im
ber to form a toggle. The apparatus is capable of grip‘
prove gripping action on hides or other ?exible materials
ping the sheet-like material against the recessed mem
55 having a smooth surface.
‘In operation, a preferred embodiment of the appara
One particularly important use for the apparatus is
in connection with the dehairing of hides and skins. For
tus, clamp '10 is mounted, as described, on a conveyor
belt 28. A clamp is opened as illustrated in FIGURE 2,
instance, the present apparatus may be utilized to grip
position A, and a hide ‘40 is placed on the belt 28 with one
"a sheepskin While the wool is being stripped therefrom.
It also ?nds useful application in machinery for removing 60 end extending over ?ange ‘24 into the recessed portion 14.
The conveyor belt 28 is moved in the direction indicated
manure, etc., from pelts and hides. The present ap
by arrow 41 in FIGURE 2, and the toggle 32 will pass
paratus is particularly suitable for use with a dehair
between a closing roll ‘42 and a cooperating backing roll
ing device of the type disclosed in US. Patent No. 2,841,
43 (both journaled in a frame 44). Consequently, the
829 to Strandine et al., which discloses an apparatus in
cluding a belt conveyor on which pelts or skins are 65 closing roll 42 upon engaging projection 35 of toggle 3-2
applies a pressure which forces the toggle downward
placed. The pelts or skins are carried by the belt con
through position B. with the leading edge 39 of plate 36
veyor through a series of rollers which physically pull
The apparatus is most ef
entering over the hide ‘40 and into channel 22 under
fective when used to grip materials of substantially non
?ange 24. ‘It should be noted that in positions A and B
the hair or Wool therefrom.
slippery nature; however, where it is necessary to use a 70 the angle between hinge member 34 and plate 36 is
less than 180°. As conveyor belt 28 continues to move,
depilatory agent, which results in a slippery hide, it is
carrying the hide, closing roll 42 continues to apply pres
preferable to remove a small quantity of hair from the
sure to projection 35' of the toggle, and forces the plate
terial, said apparatus comprising: an endless conveyor belt,
into locked position C, whereby the leading edge 39 of
plate 3'4 is forced ?rmly into channel 22 thereby eifec
tively gripping hide 40. In the locked position, the angle
between hinge member 35 and plate 36 is slightly greater
said belt having an opening therein; a clamp member se
cured to said conveying means, said clamp member hav
ing a recessed base positioned within said opening and
an upstanding wall generally transverse to the direc
tion of motion of said conveying means, said wall being
than 180° and any pulling forces acting on hide 40 will
tend to increase the angle and cause the toggle to grip
at an acute angle to said base and forming a channel
therebetween; toggle means pivotally mounted with re
Rolls 42 and 43 are closely spaced one above the other
spect to said base generally opposite said wall, said to-g- .
and may be provided with suitable meshed gears 45 and 10 gle means having an edge thereof extendable to within
said channel whereby sheet material may be gripped there
46, respectively, causing the two rolls to turn toward one
another on the application of power to either of the gears.
between; closing means associated with said convey—
ing means for pivoting the toggle means toward said
A pulley 47 is ?xedly attached to gear 46 and in turn
base to therebyforce said edge toward said channel; an
connected through a belt 48 to a power source, not
shown, to move rolls'42,‘43 at a linear speed substantially 15 opening means associated with said conveying means
spaced in the direction of motion from said closing means,
equal tothe belt 28, However, r-olls 42 and 43 need
said opening means adapted for pivoting said toggle
not necessarily be supplied with power Since the motion
away from said base thereby removing said edge from
of belt 28 and clamp 10 passing therebetween is suf
?cient to close the clamp and secure a hide therein.
said channel to release the sheet material.
even more ?rmly.
Furthermore, in lieu of backing roll 43, a backing plate 20
or other suitable backing surface may be substituted to
support the conveyor belt and clamp against the pres
sure exerted by closing roll 42.
2., Apparatus for gripping ‘and moving sheet-like ma
terial, said apparatus comprising: an endless conveyor
belt, said belt having ‘an opening formed therein; a
recessed clamp member seated in the opening in said
belt, said recessed member having an open base and up
With one end of a hide secured in the clamp, a rela
tively large force, such as that used in removing wool 25 standing walls on said base, one of said walls transverse
from sheepskins, may be applied to the hide without it
to said conveyor belt being at an acute angle to said base
being pulled from the clamp. The operation of a suit
and forming a channel therebetween; a pivotable mem
ber hinged to said recessed member along a side opposite
able dehairing device is schematically shown in "FiGURE
3. Illustrated in this ?gure are conveyor 28, closing roll
said one wall, saidpivotable member having a projection
42, backing roll 43, a hair loosening roll 49, a pair of 30 extending upwardly at an angle from said pivotable mem
unhairing rolls '50 and 51, clamp opening means 53
ber; a plate pivotally connected to said pivotable mem
ber along an edge opposite said side, said plate extend
(to be described) and various other conveyor operating
elements. The clamp of the present invention may be
ing to within said channel when said pivotable member
placed on the conveyor of such a device substantially as
is turned toward said base whereby to grip the sheet
described. Thus, the hide may be automatically and 35 material between said plate and said channel; closing
quickly secured in the clamp and will be ?rmly held
means adjacent the upper surface of said conveyor co
operable with said projection on said pivotable member
while the unhairing rolls ‘50, 51 remove hair.
Subsequent to the processing steps, the clamp 10 may be
to turn it toward said base; and opening means adjacent
automatically opened, so as to release the hide 40, by ap
the lower surface of said conveyor spaced in the di-v
plying a force against the underside of toggle 32 through 40 rection of conveyor travel from said closing means,
the opening .17 in the base 16 of recessed member 14.
said opening means being extendable through the open
Such a force may be applied by hand against the inside
base of said recessed clamp to turn the pivotable mem
face of toggle .32, thus forcing the toggle upward remov
ber away therefrom whereby to release the sheet mate
ing leading edge 39‘ of plate 36 from channel 22 and re
leasing the hide from the clamp. However, various
3. A gripping device suitable for attachment to con
mechanical opening means generally 53 may be utilized
veyors for securing sheet-like material thereto, said device
for applying a force to the toggle. One such means,
comprising: a recessed clamp member, said recessed
shown in FIGURE 2, is comprised of a plunger 54 posi
member having an open base and upstanding walls on
tioned below the conveyor belt at a convenient location
said base, one of said walls being disposed at an acute
angle to said base forming a channel therebetween; outa
turned ?anges connected to ‘said wallsfor mounting said
beyond, in the direction of conveyor travel, the area at
which the hide is worked upon. Plunger 54 is recip
rocable by a cylinder and piston 56 which'may be ac
tuated by a convenient. sensing means, such as'a photo~
clamp member within an opening in an endless belt; a
pivotable member hinged to said recessed member along
electric cell, not shown, ‘as the clamp passes over the
plunger. ‘Plunger 54 is quickly moved into the opening
a side opposite said one wall, said pivotable member hav
55 ing a projection extending upwardly at an angle from
17 of clamp .10 to apply aforce to the toggle 32 and thus
open the clamp and release the hide. Other means may
said pivotable member; a plate pivotally connected to
said pivotable member along an edge opposite said side,
be used to apply the force against the toggle in an upward
said plate and said pivotable member being of suf?cient
direction with respect to the conveyor 28, to cause the
dimensions. to enable the plate to extend to within said
hinge member 34 and plate ‘36 to pivot with respect to 60 channel when said pivotable member is turned toward
one another thereby reducing the distance between lead
said base by a force on said projection thereby gripping
ing edge 39 and pin 35. For instance, a ?nger may be piv
an end of the sheet-like material between said plate and
otally mounted below the conveyor belt to move gen
said channel.
erally in thedirection of conveyor travel while it passes
References Cited in the ?le of this patent
into the opening of the clamp.
Obviously, many modi?cations and variations of the
invention as hereinbefore set forth may be made with
out departing vfrom the spirit and scope thereof, and
Van Alstyn __________ __ Mar. 5, 1935
therefore ‘only such-limitations should be imposed as are
Wallace ____________ __ Nov. 21, 1950
Wisseman __________ __ Aug. 13, 1957
indicated in the. ‘appended claims.
We claim:
1. Apparatus for gripping and moving sheet-like ma
Strandine et a1. _______ __ July 8, 1958
Weis _______________ __ June 7, 1960
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