Preparation of fibrous reinforced sausage-type casings from melt-extruded polyvinyl alcohol resins
Abstract
Abstract A NOVEL FIBROUS CASING FOR PACKAGING SAUSAGES AND SIMILAR PRODUCTS COMPRISES A SATURATING TISSUE IMPREGNATED WITH A MELT-EXTRUDED FILM OF A POLYVINYL ALCOHOL RESIN. THE CASING IS PREFERABLY PREPARED BY MELT EXTRUDING A PLASTICIZED, FILM-FORMING POLYVINYL ALCOHOL RESIN TO FORM A FILM AND, SIMULTANEOUS WITH OR SUBSEQUENT TO THE EXTRUSION STEP, IMPREGNATING AND COATING A SATURATING TISSUE WITH THE EXTRUDED FILM. THE RESIN FILM THEN MAY BE, AND PREFERABLY IS, REACTED WITH A SUITABLE CROSS-LINKING AGENT, VIZ FORMALDEHYDE, TO RENDER IT LESS SENSITIVE TO WATER AND OTHER SOLVENTS. RESIN IMPREGNATED SATURATING TISSUE MAY BE FORMED DIRECTLY INTO A TUBULAR CASING OR INITIALLY MAY BE PRODUCED AS A SHEET WHICH IS SLIT TO APPROPRIATE WIDTH AND THEN FORMED INTO A TUBULAR CASING IN A SEPARATE SEAMING OPEATION. CASINGS ARE PREFERABLY FORMED USING LONG FIBER HEMP PAPERS AS THE SATURATING TISSUES AND USING FILMFORMING POLYVINYL ALCOHOL RESINS HAVING A HYDROXYL GROUP D.S. OF AT LEAST ABOUT 60%, AND MORE PREFERABLY IN THE RANGE OF FROM ABOUT 95% TO ABOUT 99.99%.
Inventors
- 👤 Seymour Oppenheimer
- 👤 Albin F Turbak
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |