Patent US3135448A successfully refreshed from Google Patents.
US3135448A
Expired / Lapsed
US
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Apparatus for transversely tautening a length of web material
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-01-08
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Granted: 1964-06-02
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Expires: 1982-01-08
Abstract
No abstract record available.
Inventors
- 👤 Wilson Aubrcy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:15
CPC Classifications
B; B29; B29D; B29D7/00; B29C; B29C71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
APPARATUS FOR REDUCING SAG IN A LENGTH OF SHEET MATERIAL BY TRANSVERSELY TAUTENING THE SAME COMPRISING A PAIR OF NIP ROLLERS WITH THEIR PERIPHERAL SURFACES IN CONTACT WITH EACH OTHER ALONG A NIP LINE, THE SHAPE OF SAID PERIPHERAL SURFACES AND THE RELATIVE POSITIONS OF SAID ROLLERS BEING SUCH THAT THE PERIPHERAL SPEED AT THE NIP LINE IS GREATER AT THE ENDS OF SAID PERIPHERAL SURFACES THAN AT THEIR CENTERS WHEREBY SHEET MATERIAL PASSING BETWEEN SAID ROLLERS IS TRANSVERSELY TAUTENED, ONE OF SAID NIP ROLLERS BEING CONSTRUCTED FROM A NON-YIELDING MATERIAL AND HAVING A CONCAVE PROFILE THEREBY HAVING A LARGER DIAMETER AT ITS ENDS THAN AT THE CENTRE AND THE OTHER NIP ROLLER BEING CONSTRUCTED SO THAT IT HAS AT LEAST AN OUTER PORTION OF AN ELASTICALLY YIELDABLE MATERIAL AND IS SHAPED TO HAVE A CONVEX PROFILE WHICH MATES WITH THE CONCAVE PROFILE OF THE SAID ONE ROLLER.
Claim 2
Dependent Claim
148 words
APPARATUS FOR REDUCING SAG IN A LENGTH OF SHEET MATERIAL BY TRANSVERSELY TAUTENING THE SAME COMPRISING A PAIR OF NIP ROLLERS WITH THEIR PERIPHERAL SURFACES IN CONTACT WITH EACH OTHER ALONG A NIP LINE, THE SHAPE OF SAID PERIPHERAL SURFACES AND THE RELATIVE POSITIONS OF SAID ROLLERS BEING SUCH THAT THE PERIPHERAL SPEED AT THE NIP LINE IS GREATER AT THE ENDS OF SAID PERIPHERAL SURFACES THAN AT THEIR CENTERS WHEREBY SHEET MATERIAL PASSING BETWEEN SAID ROLLERS IS TRANSVERSELY TAUTENED, ONE OF SAID NIP ROLLERS BEING CONSTRUCTED FROM A NON-YIELDING MATERIAL AND HAVING A CONCAVE PROFILE THEREBY HAVING A LARGER DIAMETER AT ITS ENDS THAN AT THE CENTRE AND THE OTHER NIP ROLLER BEING CONSTRUCTED SO THAT IT HAS AT LEAST AN OUTER PORTION OF AN ELASTICALLY YIELDABLE MATERIAL AND IS SHAPED TO HAVE A CONVEX PROFILE WHICH MATES WITH THE CONCAVE PROFILE OF THE SAID ONE ROLLER.
References Cited (Backward Citations)
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US2246004A
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US2517067A
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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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |