Patent US3154608A successfully refreshed from Google Patents.
US3154608A
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Method and apparatus for providing optimum optical properties of polyolefins by controlling the extrusion of the material
Assignee: Fort James Corp
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Filing: 1961-06-20
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Granted: 1964-10-27
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Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Arthur N Aronsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:24
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/915; B29C48/916; B29C48/03; B29C48/07; B29C48/08; B29C48/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
THE METHOD OF CONTROLLING THE OPTICAL PROPERTIES OF POLYOLEFIN FILM WHILE IT IS CONTINOUSLY BEING FORMED BY CONTINUOUS DEPOSIT OF MOLTEN POLYOLEFIN FROM AN EXTRUSION DEVICE ON TO A CONTINOUSLY MOVING CASTING SURFACE WHICH IS SPACED FROM THE DEVICE WHEREBY A CONTINOUSLY MOVING SECTION OF THE POLYOLEFIN EXISTS IN SUCH SPACE BETWEEN THE CASTING SURFACE AND THE DEVICE, AND WHEREBY AFTER DEPOSITF ON SUCH SURFACE THE FILM SETS ALONG A FROST LINE EXTENDING TRANSVERSELY OF THE DIRECTION OF MOVEMENT OF THE FILM; WHICH COMPRISES EFFECTING SAID DEPOSIT OF THE POLOLEFIN ONTO SAID CASTING SURFACE WHILE THE POLYOLEFIN IS IN SUBSTANTIALLY AMORPHOUS CONDITION AND SIMULTANEOUSLY SUBJECTING THE LEADING AND TRAILING FACES OF SAID SECTION TO A DIFFERENTIALL PRESSURE WITH THE LESSER PRESSURE AT THE TRAILING FACE, PROVIDING MEANS FOR ADJUSTMENT OF THE AMOUNT OF SAID DIFFERENTIAL PRESSURE, PROVIDING MEANS FOR ADJUSTMENT OF THE SPEED OF MOVEMENT OF SAID CASTING SURFACE, AND CORRELATING SUCH ADJUSTMENTS TO CONTROL THE CHARACTER OF SAID FROST LINE FOR PROVIDING OPTIMUM OPTICAL PROPERTIES IN SAID FILM.
Claim 2
Independent Claim
169 words
THE METHOD OF CONTROLLING THE OPTICAL PROPERTIES OF POLYOLEFIN FILM WHILE IT IS CONTINOUSLY BEING FORMED BY CONTINUOUS DEPOSIT OF MOLTEN POLYOLEFIN FROM AN EXTRUSION DEVICE ON TO A CONTINOUSLY MOVING CASTING SURFACE WHICH IS SPACED FROM THE DEVICE WHEREBY A CONTINOUSLY MOVING SECTION OF THE POLYOLEFIN EXISTS IN SUCH SPACE BETWEEN THE CASTING SURFACE AND THE DEVICE, AND WHEREBY AFTER DEPOSITF ON SUCH SURFACE THE FILM SETS ALONG A FROST LINE EXTENDING TRANSVERSELY OF THE DIRECTION OF MOVEMENT OF THE FILM; WHICH COMPRISES EFFECTING SAID DEPOSIT OF THE POLOLEFIN ONTO SAID CASTING SURFACE WHILE THE POLYOLEFIN IS IN SUBSTANTIALLY AMORPHOUS CONDITION AND SIMULTANEOUSLY SUBJECTING THE LEADING AND TRAILING FACES OF SAID SECTION TO A DIFFERENTIALL PRESSURE WITH THE LESSER PRESSURE AT THE TRAILING FACE, PROVIDING MEANS FOR ADJUSTMENT OF THE AMOUNT OF SAID DIFFERENTIAL PRESSURE, PROVIDING MEANS FOR ADJUSTMENT OF THE SPEED OF MOVEMENT OF SAID CASTING SURFACE, AND CORRELATING SUCH ADJUSTMENTS TO CONTROL THE CHARACTER OF SAID FROST LINE FOR PROVIDING OPTIMUM OPTICAL PROPERTIES IN SAID FILM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |