Patent US3922398A successfully refreshed from Google Patents.
US3922398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming fibrous sausage casings
Assignee: Continental Group Inc
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Filing: 1974-05-08
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Granted: 1975-11-25
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Expires: 1994-05-08
Abstract
Abstract This invention relates to an improvement in a process for producing fibrous (reinforced) artificial sausage casings. In the basic process, a porous web is formed into a tube, impregnated with polymeric dope in an impregnation zone vented for removal of accumulated fluids, coagulated, regenerated, and then inflated for drying. The improvement in this basic process resides in the method for venting fluids from the tubular fibrous casing and comprises masking a section of the porous web with a masking agent prior to impregnating said web in said impregnation zone thereby preventing this section from being impregnated with the polymeric dope and then removing said mask after the casing has passed through said impregnating zone. In a preferred embodiment after regeneration and prior to drying, the masked section is coated with a flexible, air impermeable film-forming material.
Inventors
- 👤 Douglas J Bridgeford
- 👤 Frank M Mcneil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:04
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C2013/0066; A22C2013/0069; Y; Y10; Y10S; Y10S53/00; Y10S53/01
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
139 words
IN A METHOD FOR FORMING A TUBULAR FIBROUS SAUSAGE CASING WHICH INCLUDES THE STEPS OF EXTRUDING A POROUS WEB AS A TUBE. IMPREGNATING SAID POROUS WEB WITH A POLYMERIC DOPE IN AN IMPREGNATION ZONE, COAGULATING AND REGENERATING THE POLYMER, VENTING FLUDIS WHICH ACCUMULATE INSIDE SAID TUBULAR CASING DURING COAGULATION AND REGERATION, AND THEN DRYING; THE IMPROVEMENT FOR VENTING FLUIDS FROM SAID TUBULAR CASING WHICH COMPRISES: MASKING A SECTION OF SAID WEB WITH A MASKING AGENT PRIOR TO THE STEP OF IMPREGNATING SAID WEB WITH POLYMERIC DOPE THEREBY PREVENTING SAID SECTION FROM BECOMING IMPREGNATED; AND, THEN, REMOVING SAID MASKING AGENT THEREBY LEAVING AN UNCOATED SECTION AFTER SAID CASING HAS PASSED THROUGH SAID IMPREGNATION ZONE, COATING SAID UNCOATED SECTION OF SAID CASING WITH A FLEXIBLE, FILM-FORMING, AIR-IMPERMEABLE MATERIAL AFTER SAID CASING HAS PASSED THROUGH THE REGENERATING ZONE AND PRIOR TO DRYING.
Claim 2
Dependent Claim
139 words
IN A METHOD FOR FORMING A TUBULAR FIBROUS SAUSAGE CASING WHICH INCLUDES THE STEPS OF EXTRUDING A POROUS WEB AS A TUBE. IMPREGNATING SAID POROUS WEB WITH A POLYMERIC DOPE IN AN IMPREGNATION ZONE, COAGULATING AND REGENERATING THE POLYMER, VENTING FLUDIS WHICH ACCUMULATE INSIDE SAID TUBULAR CASING DURING COAGULATION AND REGERATION, AND THEN DRYING; THE IMPROVEMENT FOR VENTING FLUIDS FROM SAID TUBULAR CASING WHICH COMPRISES: MASKING A SECTION OF SAID WEB WITH A MASKING AGENT PRIOR TO THE STEP OF IMPREGNATING SAID WEB WITH POLYMERIC DOPE THEREBY PREVENTING SAID SECTION FROM BECOMING IMPREGNATED; AND, THEN, REMOVING SAID MASKING AGENT THEREBY LEAVING AN UNCOATED SECTION AFTER SAID CASING HAS PASSED THROUGH SAID IMPREGNATION ZONE, COATING SAID UNCOATED SECTION OF SAID CASING WITH A FLEXIBLE, FILM-FORMING, AIR-IMPERMEABLE MATERIAL AFTER SAID CASING HAS PASSED THROUGH THE REGENERATING ZONE AND PRIOR TO DRYING.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said polymeric dope is viscose.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein said masking agent is removed prior to the steps of coagulating and regenerating.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein said masking agent is tape.
Claim 6
Dependent Claim
22 words
The method of claim 2 wherein said masking agent is selected from the group consisting of liquid polyhydric alcohols and salt solutions.
Claim 7
Dependent Claim
20 words
The method of claim 5 wherein said masking agent is a polyhydric alcohol having from 2 - 6 carbon atoms.
Claim 8
Dependent Claim
11 words
The method of claim 6 wherein said polyhydric alcohol is glycerol.
Claim 9
Dependent Claim
16 words
The method of claim 5 wherein said film-forming, air impermeable material is a polymeric film-forming material.
Claim 10
Dependent Claim
14 words
The method of claim 8 wherein said polymeric film-forming materials are thermoplastic polymer granules.
Claim 11
Dependent Claim
35 words
The method of claim 9 wherein said film-forming material is applied by melting a polyolefin or polyamide polymeric film-forming material, applying this melt to the uncoated section of tubular casing, and then solidifying said melt.
Claim 12
Dependent Claim
13 words
The method of claim 10 wherein said polymeric film-forming material is granulated nylon.
Claim 13
Dependent Claim
22 words
The method of claim 8 wherein said film-forming material is an emulsion of a lower alkyl ester of acrylic or methacrylic acid.
Claim 14
Dependent Claim
15 words
The method of claim 12 wherein said acrylic emulsion is of a self-crosslinking acrylic ester.
Claim 15
Dependent Claim
17 words
The method of claim 8 wherein said polymeric film-forming material is a sOlution of a polyamide resin.
Claim 16
Dependent Claim
17 words
The method of claim 14 wherein said polyamide resin is a dimerized vegetable oil fatty acid amide.
Claim 17
Dependent Claim
13 words
The method of claim 14 wherein said polyamide resin is a hydroxylmethylated nylon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |