US3930036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edible collagen sausage casing and method of preparing same
Assignee: Continental Group Inc
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Filing: 1974-07-12
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Granted: 1975-12-30
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Expires: 1994-07-12
Abstract
Abstract In the manufacture of an edible collagen casing, hide collagen is formed into a slurry, swollen with acid, and extruded as a thin-walled hollow tube into a coagulation bath. The extruded casing is subsequently tanned or hardened in an aluminum sulfate tanning bath followed by treatment with a dilute solution of glutaraldehyde. The casing is washed, plasticized and dried. A substantial improvement in the shirring of the casing is obtained when the gel casing is treated with an aqueous solution containing at least 0.002% (and preferably 0.05 - 0.15%) sodium dihydrogen phosphate, neutralized to pH 6.0 - 8.0, subsequent to the glutaraldehyde treatment and prior to drying of the casing.
Inventors
- 👤 Noel I Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:57
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
IN A METHOD OF PREPARING EDIBLE TUBULAR COLLAGEN SAUSAGE CASINGS WHICH COMPRISES: A. GRINDING ANIMAL HIDE COLLAGEN TO FORM AN AQUEOUS SLURRY, B. TREATING THE SLURRY WITH ACID AT A PH OF 2.5 - 3.7 TO SWELL THE COLLAGEN, C. EXTUDING THE SLURRY AT A COLLAGEN CONTENT OF 2 - 8% THROUGH AN ANNULAR DIE INTO A COAGULATION BATH TO FORM A TUBULAR GEL COLLAGEN CASING, D. TANNING THE GEL CASING IN TWO STEPS FIRST IN A TANNING BATH OF AN ALUMINUM SALT SOLUTION AND THEN IN A DILUTE SOLUTION OF GLUTARALDEHYDE, AND E. WASHING, PLASTICIZING, AND DRYING THE CASING TO PRODUCE A TRANSLUCENT NON-FIBROUS EDIBLE PRODUCT, THE IMPROVEMENT WHICH COMPRISES: TREATING THE GEL COLLAGEN CASING WITH A DILUTE SOLUTION OF AN ACID ORTHOPHOSPHATE SALT AT PH 6 - 8 AFTER THE FINAL TANNING STEP AND PRIOR TO DRYING, WHEREBY THE FREE ALUMINUM IN THE GEL CASING IS CONVERTED TO AN INSOLUBLE ALUMINUM PHOSPHATE.
Claim 2
Dependent Claim
154 words
IN A METHOD OF PREPARING EDIBLE TUBULAR COLLAGEN SAUSAGE CASINGS WHICH COMPRISES: A. GRINDING ANIMAL HIDE COLLAGEN TO FORM AN AQUEOUS SLURRY, B. TREATING THE SLURRY WITH ACID AT A PH OF 2.5 - 3.7 TO SWELL THE COLLAGEN, C. EXTUDING THE SLURRY AT A COLLAGEN CONTENT OF 2 - 8% THROUGH AN ANNULAR DIE INTO A COAGULATION BATH TO FORM A TUBULAR GEL COLLAGEN CASING, D. TANNING THE GEL CASING IN TWO STEPS FIRST IN A TANNING BATH OF AN ALUMINUM SALT SOLUTION AND THEN IN A DILUTE SOLUTION OF GLUTARALDEHYDE, AND E. WASHING, PLASTICIZING, AND DRYING THE CASING TO PRODUCE A TRANSLUCENT NON-FIBROUS EDIBLE PRODUCT, THE IMPROVEMENT WHICH COMPRISES: TREATING THE GEL COLLAGEN CASING WITH A DILUTE SOLUTION OF AN ACID ORTHOPHOSPHATE SALT AT PH 6 - 8 AFTER THE FINAL TANNING STEP AND PRIOR TO DRYING, WHEREBY THE FREE ALUMINUM IN THE GEL CASING IS CONVERTED TO AN INSOLUBLE ALUMINUM PHOSPHATE.
Claim 3
Dependent Claim
16 words
A method in accordance with claim 1 in which the collagen is from unlimed animal hides.
Claim 4
Dependent Claim
18 words
A method in accordance with claim 1 in which the collagen is from limed and acid-delimed animal hides.
Claim 5
Dependent Claim
59 words
A method in accordance with claim 1 in which the first tanning bath comprises a solution of an aluminum salt complexed with an organic acid and rendered partially basic by treatment with alkaline material, said tanning bath having a pH in excess of 3.0 and said second named tanning bath comprises an aqueous solution containing 0.001 - 5.0% glutaraldehyde.
Claim 6
Dependent Claim
49 words
A method in accordance with claim 1 in which the first tanning bath comprises a solution of 5 - 20% aluminum sulfate, Al2(SO4)3.18H2O, 3 - 7% sodium citrate, and 3 - 7% sodium carbonate, formulated to produce a one-third to two-thirds basic aluminum sulfate salt complexed with sodium citrate.
Claim 7
Dependent Claim
22 words
A method in accordance with claim 1 in which the phosphate salt is a mixture of alkali metal mono- and dihydrogen phosphates.
Claim 8
Dependent Claim
53 words
A method in accordance with claim 1 in which the gel casing contains about 0.2 - 5% aluminum and is treated with a solution containing at least 0.002% of said acid phosphate salt and not substantially in excess of the stoichoimetric amount required to react with all of the aluminum in said casing.
Claim 9
Dependent Claim
24 words
A method in accordance with claim 1 in which said phosphate salt is added in the plasticizing bath just prior to drying said casing.
Claim 10
Dependent Claim
12 words
An edible sausage casing of collagen produced in accordance with claim 1.
References Cited (Backward Citations)
US3425847A
Cited
US3533809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |