Patent US1734507A successfully refreshed from Google Patents.
US2728951A
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Process for quenching melt extruded film
Assignee: Imperial Chemical Industries Ltd
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Filing: 1953-01-19
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Granted: 1956-01-03
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Expires: 1973-01-19
Abstract
No abstract record available.
Inventors
- 👤 O'hanlon Aidan Francis
- 👤 Cornforth Jack Witherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:19
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/919; B29C48/03; B29C48/07; B29C48/08; B29C48/911; B29C48/001; B29C48/0018; Y; Y10; Y10S; Y10S264/00; Y10S264/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR QUENCHING A MELT EXTRUDED FILM OF A HIGHLY POLYMERIC SYNTHETIC LINEAR COMPOUND WHICH COMPRISES PASSING THE FILM DOWNWARDS IN ITS MOLTEN STATE INTO A POOL OF LIQUID MAINTAINED IN THE NIP FORMED BETWEEN TWO CONTRA-ROTATING ROLLS, SAID LIQUID BEING MAINTAINED AT A TEMPERATURE CONSIDERABLY BELOW ITS OWN BOILING POINT, BEING OF SUFFICIENT QUANTITY AND DEPT AND BEING SUFFICIENTLY BELOW THE MELTING POINT OF THE POLYMERIC COMPOUND TO BRING ABOUT RAPID CHILLING OF THE FILM TO THE SOLID STATE, THE TWO ROLLS BEING ROTATED AT EQUAL PERIPHERAL SPEED AND EACH ROLLS, AT THE NIP, ROTATING IN THE DIRECTION OF TRAVEL OF THE QUENCHED FILM WHICH PASSES THROUGH THE NIP.
Claim 2
Dependent Claim
111 words
A PROCESS FOR QUENCHING A MELT EXTRUDED FILM OF A HIGHLY POLYMERIC SYNTHETIC LINEAR COMPOUND WHICH COMPRISES PASSING THE FILM DOWNWARDS IN ITS MOLTEN STATE INTO A POOL OF LIQUID MAINTAINED IN THE NIP FORMED BETWEEN TWO CONTRA-ROTATING ROLLS, SAID LIQUID BEING MAINTAINED AT A TEMPERATURE CONSIDERABLY BELOW ITS OWN BOILING POINT, BEING OF SUFFICIENT QUANTITY AND DEPT AND BEING SUFFICIENTLY BELOW THE MELTING POINT OF THE POLYMERIC COMPOUND TO BRING ABOUT RAPID CHILLING OF THE FILM TO THE SOLID STATE, THE TWO ROLLS BEING ROTATED AT EQUAL PERIPHERAL SPEED AND EACH ROLLS, AT THE NIP, ROTATING IN THE DIRECTION OF TRAVEL OF THE QUENCHED FILM WHICH PASSES THROUGH THE NIP.
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |