US3515358A - Leather disintegrating apparatus - Google Patents

Leather disintegrating apparatus Download PDF

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Publication number
US3515358A
US3515358A US740644A US3515358DA US3515358A US 3515358 A US3515358 A US 3515358A US 740644 A US740644 A US 740644A US 3515358D A US3515358D A US 3515358DA US 3515358 A US3515358 A US 3515358A
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leather
roll
shaped projections
scratch
scratch roll
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US740644A
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Hisao Sato
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B2700/00—Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
    • C14B2700/28—Processes or apparatus for the mechanical treatment of hides or leather not provided for in groups C14B2700/01 - C14B2700/27

Definitions

  • the present invention relates to an apparatus for disintegrating chemically pretreated leather to produce collagen fibers.
  • the respective band portions between the spike shaped projections are wound the full width of the roll with still wire to fasten the steel bands to the scratch roll.
  • a pair of feed rolls is positioned to face the scratch roll, and a push plate, made of a high elasticity material, is disposed immediately below the feed rolls in opposite relationship to the scratch roll.
  • the push plate made of a high elasticity material is effective not only in increasing the efficiency of disintegration by lightly pressing the carded leather further against the spike shaped projections, but also in discharging the disintegrated leather in uniform density.
  • FIG. 1 is a diagrammatic side elevational view of a preferred embodiment of the present invention using two units of the apparatus arranged in series;
  • FIG. 2 is an enlarged sectional view, broken in part, of the apparatus of the present invention.
  • FIG. 3 is an enlarged section along the lines III-Ill of FIG. 2, broken in part, showing the spike shaped projections on the scratch roll.
  • a scratch roll 1 is provided at its periphery with steel bands 18, eachband having spike shaped projections 17 set therein.
  • the respective band portions between the spike shaped projections 17 are firmly wound the full width with. wire 19 to fasten the steel bands 18 to the roll 1.
  • the plurality of steel bands 18 disposed on the surface of the scratch roll 1 is arranged preferably parallel to the axis of the roll 1, as indicated in FIG. 2, each band extending across the width of the roll 1 and having the spaced projections 17 thereon. At least one steel Wire 19 is Wound circumferentially on the portions of the bands 18 between the adjacent pairs of projections 17, across the entire Width of the scratch roll 1 to hold the bands 18 to the surface of the scratch roll.
  • a pair of feed rolls 2 are urged toward each other and are positioned to face the scratch roll 1. immediately beneath the feed rolls 2, there is mounted an elastic push plate 3 formed preferably of synthetic resin or steel.
  • the leather, disintegrated by the spike shaped projections 17, is further pressed lightly by the push plate 3 made of a high elasticity material against the spike shaped projections 17, and gradually turns into a fibrous form.
  • the fibrous mass and the broken pieces of leather are released from the push plate 3 and drop down onto a guide plate 9, as indicated by the downwardly curved arrow at the right hand portion of FIG. 1.
  • the leather substances which are light in weight are thrown by the force of rotation of the scratch roll 1 onto a feed lattice 5, as indicated by the curved arrow pointing to feed lattice 5 at the right hand portion of FIG. 1, and are subsequently fed by another pair of feed rolls 11 to another scratch roll 10.
  • the scratch roll 10 has the same construction as the scratch roll 1, with the exception that the former has a smaller diameter and smaller spike shaped projections than the latter.
  • the broken pieces of leather are partially unravelled collagen fiber mass which are conveyed from the feed lattice 5 are pressed by the feed rolls 11 against the scratch roll 10, and are then further pressed lightly against the scratch roll 10 by an elastic push plate 12, and are thereby converted into a fibrous form.
  • the fibrous mass or broken pieces of leather released from the push plate 12 are screened by a screening plate 15, and only those which are completely in the form of collagen fibers are sent to a feed lattice 14 and from there delivered as products by a toothed guide 16 to a predetermined position.
  • the fibers which pass through the screening plate 15 average about 0.05 mm. in thickness and about 25 mm. in length.
  • the yield thereof is about of the leather fed.
  • the pieces of leather which remain on the guide plate 9, without being thrown onto the feed lattice 5, and the pieces of leather which do not pass through the screening plate 15 are returned by a return lattice 6, and lattices 7 and 8, respectively, and are fed again to the scratch roll 1 together with fresh leather.
  • Feed I'OHCI'SA and 13 are provided, as indicated in FIG. 1.
  • a cycle of operation described above, is repeated. Because steel wire 19 is provided circumferentially between the spike shaped projections 17, all of the projections are prevented from piercing the leather fed when the latter is pressed against the former. Consequently, the impulsive force exerted on the spike shaped projections is reduced, thereby preventing the leather from being forcibly disintegrated and preventing the spike shaped projections from being damaged.
  • a cycle of operation described above, is repeated. Because steel wire 19 is provided circumferentially between the spike shaped projections 17, all of the projections are prevented from piercing the leather fed when the latter is pressed against the former. Consequently, the impulsive force exerted on the spike shaped projections is reduced, thereby preventing the leather from being forcibly disintegrated and preventing the spike shaped projections from being damaged.
  • the leather fed in is distintegrated gradually into long ,colagen fibers.
  • the apparatus is designed so that the leather which is not completely disintegrated is circulated and again fed, together with fresh leather to the scratch roll. Accordingly, leather is always fed to the scratch roll in substantially uniform density, and the impulsive force applied to the spike shaped projections is evenly distributed.
  • a push plate of a highly elastic material disposed immediately beneath said pair of feed rolls and disposed adjacent to and in opposed relationship with said scratch roll.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

June 2, 1970 HISAO SATO 3,515,358
LEATHER DISINTEGRATING APPARATUS Filed June 27, 1968 INVENTOR BY W ATTORNEY United States Patent Office 3,515,358 Patented June 2, 1970 3,515,358 LEATHER DISINTEGRATING APPARATUS Hisao Sato, 54-6 Nishigahara 4-cl1ome, Kita-ku,
Tokyo, Japan Filed June 27, 1968, Ser. No. 740,644
Claims priority, application Japan, July 1, 1967,
Int. Cl. B02c 18/22, 18/28 US. Cl. 241-280 1 Claim ABSTRACT OF THE DISCLOSURE The present invention relates to an apparatus for disintegrating chemically pretreated leather to produce collagen fibers.
Leather used as a raw material exists in various forms. Even if chemically treated, the constituent fibers remain firmly bound together. Heretofore, in conventional apparatus for such treatment, it was often observed that when a large piece of leather was fed by feed rolls and pressed against a scratch roll, the spike shaped projections on the scratch roll were immediately subjected to strong impulsive forces, causing damage thereto.
It is an object of the present invention to provide an apparatus for disintegrating leather to produce collagen fibers at high efficiency.
It is another object of the present invention to provide an apparatus for disintegrating leather, the apparatus of this invention comprising a scratch roll which is provided at its outer peripheral surface with steel bands, each band having a plurality of spike shaped projections set therein. The respective band portions between the spike shaped projections are wound the full width of the roll with still wire to fasten the steel bands to the scratch roll. A pair of feed rolls is positioned to face the scratch roll, and a push plate, made of a high elasticity material, is disposed immediately below the feed rolls in opposite relationship to the scratch roll.
It is another object of the present invention to provide an apparatus for disintegrating leather using two units of the apparatus, the leather fed into the system being disintegrated and carded by the pointed ends of the spike shaped projections and, when undue force is exerted thereon, the leather enters the space between the spike shaped projections and is thereby prevented from being forcibly broken into small pieces. Simultaneously, the pieces of leather which are not completely disintegrated, are permitted to circulate, making it possible to produce long collagen fibers with high efficiency.
Further, the push plate made of a high elasticity material, is effective not only in increasing the efficiency of disintegration by lightly pressing the carded leather further against the spike shaped projections, but also in discharging the disintegrated leather in uniform density.
With the above and other objects in view which will become apparent in the following detailed description, the present invention will be clearly understood in connection with the accompanying drawing, in which:
FIG. 1 is a diagrammatic side elevational view of a preferred embodiment of the present invention using two units of the apparatus arranged in series;
FIG. 2 is an enlarged sectional view, broken in part, of the apparatus of the present invention; and
FIG. 3 is an enlarged section along the lines III-Ill of FIG. 2, broken in part, showing the spike shaped projections on the scratch roll.
Referring now to the drawing, a scratch roll 1 is provided at its periphery with steel bands 18, eachband having spike shaped projections 17 set therein. The respective band portions between the spike shaped projections 17 are firmly wound the full width with. wire 19 to fasten the steel bands 18 to the roll 1.
The plurality of steel bands 18 disposed on the surface of the scratch roll 1 is arranged preferably parallel to the axis of the roll 1, as indicated in FIG. 2, each band extending across the width of the roll 1 and having the spaced projections 17 thereon. At least one steel Wire 19 is Wound circumferentially on the portions of the bands 18 between the adjacent pairs of projections 17, across the entire Width of the scratch roll 1 to hold the bands 18 to the surface of the scratch roll.
A pair of feed rolls 2 are urged toward each other and are positioned to face the scratch roll 1. immediately beneath the feed rolls 2, there is mounted an elastic push plate 3 formed preferably of synthetic resin or steel.
In the leather disintegrating apparatus above described, when chemically pretreated leather, for example, chrome leather, is fed through a hopper 20, and the leather is caught between the feed rolls 2. and pressed against the spike shaped projections 17 on the scratch roll 1, the leather to the most extent is disintegrated, but does not yet achieve a fibrous condition.
The leather, disintegrated by the spike shaped projections 17, is further pressed lightly by the push plate 3 made of a high elasticity material against the spike shaped projections 17, and gradually turns into a fibrous form.
The fibrous mass and the broken pieces of leather are released from the push plate 3 and drop down onto a guide plate 9, as indicated by the downwardly curved arrow at the right hand portion of FIG. 1. The leather substances which are light in weight are thrown by the force of rotation of the scratch roll 1 onto a feed lattice 5, as indicated by the curved arrow pointing to feed lattice 5 at the right hand portion of FIG. 1, and are subsequently fed by another pair of feed rolls 11 to another scratch roll 10.
The scratch roll 10 has the same construction as the scratch roll 1, with the exception that the former has a smaller diameter and smaller spike shaped projections than the latter.
The broken pieces of leather are partially unravelled collagen fiber mass which are conveyed from the feed lattice 5 are pressed by the feed rolls 11 against the scratch roll 10, and are then further pressed lightly against the scratch roll 10 by an elastic push plate 12, and are thereby converted into a fibrous form.
The fibrous mass or broken pieces of leather released from the push plate 12 are screened by a screening plate 15, and only those which are completely in the form of collagen fibers are sent to a feed lattice 14 and from there delivered as products by a toothed guide 16 to a predetermined position.
The fibers which pass through the screening plate 15 average about 0.05 mm. in thickness and about 25 mm. in length. The yield thereof is about of the leather fed.
On the other hand, the pieces of leather which remain on the guide plate 9, without being thrown onto the feed lattice 5, and the pieces of leather which do not pass through the screening plate 15 are returned by a return lattice 6, and lattices 7 and 8, respectively, and are fed again to the scratch roll 1 together with fresh leather.
Feed I'OHCI'SA and 13 are provided, as indicated in FIG. 1. In the apparatus of the present invention, a cycle of operation, described above, is repeated. Because steel wire 19 is provided circumferentially between the spike shaped projections 17, all of the projections are prevented from piercing the leather fed when the latter is pressed against the former. Consequently, the impulsive force exerted on the spike shaped projections is reduced, thereby preventing the leather from being forcibly disintegrated and preventing the spike shaped projections from being damaged. As mentioned above in the illustrated embodiment of the present invention, by using two units of the apparatus,
the leather fed in, is distintegrated gradually into long ,colagen fibers. Further, the apparatus is designed so that the leather which is not completely disintegrated is circulated and again fed, together with fresh leather to the scratch roll. Accordingly, leather is always fed to the scratch roll in substantially uniform density, and the impulsive force applied to the spike shaped projections is evenly distributed.
Although an embodiment using two units of the appara- .tus arranged in series has been described, by way of exaplurality of spike shaped projections secured to said steel band-s spaced apart from each other,
steel wire disposed between said spaced projections on the portions of said steel bands therebetween and wound around said scratch roll the entire width of the latter fastening said plurality of bands,
a pair of feed rolls adjacent said scratch roll urged toward each other, and
a push plate of a highly elastic material disposed immediately beneath said pair of feed rolls and disposed adjacent to and in opposed relationship with said scratch roll.
References Cited UNITED STATES PATENTS 1,700,621 1/1929 Allen 1997 1,851,390 3/1932 Kehoe 241-280 X 2,589,603 3/1952 Cohen 2 41102 2,700,189 1/1955 Mick 241-294 X 3,411,187 11/1968 Groce 19105 3,443,286 5/1969 Groce 19-105 FOREIGN PATENTS 1,129,070 9/1956 France.
ROBERT C. RIORDON, Primary Examiner D. G. KELLY, Assistant Examiner US. Cl. X.R.
US740644A 1967-07-01 1968-06-27 Leather disintegrating apparatus Expired - Lifetime US3515358A (en)

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JP1967056662U JPS4519048Y1 (en) 1967-07-01 1967-07-01

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JP (1) JPS4519048Y1 (en)
BE (1) BE717421A (en)
DE (1) DE1760756A1 (en)
FR (1) FR1571166A (en)
GB (1) GB1193410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5143311A (en) * 1990-05-17 1992-09-01 Newman Machine Company, Inc. Wood shavings forming apparatus and cutting roll adapted for use therewith

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5352712A (en) * 1976-10-20 1978-05-13 Mitsui Mining & Smelting Eng Process for regenerating proteinous fibers

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1700621A (en) * 1927-10-27 1929-01-29 Proctor & Schwartz Inc Means for attaching garnett teeth to cylinders
US1851390A (en) * 1932-03-29 Eeust kqete-kt
US2589603A (en) * 1949-04-26 1952-03-18 Cohen Herman Crushing machine
US2700189A (en) * 1951-12-05 1955-01-25 Mick William Picker bar and tooth assembly
FR1129070A (en) * 1955-06-09 1957-01-15 Sarl Rougier & Fils Machine for transforming wood waste or sheet and sheet materials into chips
US3411187A (en) * 1967-02-23 1968-11-19 Wellman Ind Feed roller arrangement to card licker-in
US3443286A (en) * 1966-09-07 1969-05-13 Wellman Ind Textile card and lap feeding means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1851390A (en) * 1932-03-29 Eeust kqete-kt
US1700621A (en) * 1927-10-27 1929-01-29 Proctor & Schwartz Inc Means for attaching garnett teeth to cylinders
US2589603A (en) * 1949-04-26 1952-03-18 Cohen Herman Crushing machine
US2700189A (en) * 1951-12-05 1955-01-25 Mick William Picker bar and tooth assembly
FR1129070A (en) * 1955-06-09 1957-01-15 Sarl Rougier & Fils Machine for transforming wood waste or sheet and sheet materials into chips
US3443286A (en) * 1966-09-07 1969-05-13 Wellman Ind Textile card and lap feeding means
US3411187A (en) * 1967-02-23 1968-11-19 Wellman Ind Feed roller arrangement to card licker-in

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5143311A (en) * 1990-05-17 1992-09-01 Newman Machine Company, Inc. Wood shavings forming apparatus and cutting roll adapted for use therewith

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JPS4519048Y1 (en) 1970-08-03
DE1760756A1 (en) 1972-01-05
BE717421A (en) 1968-12-16
GB1193410A (en) 1970-06-03
FR1571166A (en) 1969-06-13

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