Printing on cellulose films
Abstract
Abstract IN THE PRINTING OF CLEAR, REGENERATED CELLULOSE OR FIBERREINFORCED REGENERATED CELLULOSE SAUSAGE CASINGS, IMPROVED ADHESION OF THE INK TO THE CASING AND IMPROVED DRYING TIME FOR THE IMPRINT ARE OBTAINED BY PREPARING A CELLULOSE CASING FROM VISCOSE BY EXTRUSION, COAGULATION, WASHING, AND PLASTICIZING, AND THEN, WHILE THE CASING IS IN THE GEL STATE AND PRIOR TO DRYING THEREOF, APPLYING TO THE GEL CASING IN THE AREA TO BE IMPRINTED WITH PRINTING INK A PRIMER COATING OF AN EPOXY-SUBSTITUTED RESIN CONSISTING OF A WATER-SOLUBLE, THERMOSETTING REACTION PRODUCT OF AN EPIHALOHYDRIN AND A POLY SECONDARY AMINE, SAID EPOXY-SUBSTITUTED RESIN HAVING AN EPOXY EQUIVALENT WEIGHT OF AT LEAST ABOUT 100, THEREAFTER DRYING THE PRIMED CASHING, AND THEN IMPRINTING THE PRIMER COATED AREA OF THE DRIED CASING WITH AN OILBASED INK OR A FLEXOGRAPHIC INK.
Inventors
- 👤 H Coleman
Bibliographic Details
Claims Analysis
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |