Patent US2712407A successfully refreshed from Google Patents.
Patent US2754883A successfully refreshed from Google Patents.
US2754883A
Expired / Lapsed
US
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Apparatus for tension-calendering fabric
Assignee: Bridgestone Firestone Inc
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Filing: 1952-12-22
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Granted: 1956-07-17
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Expires: 1972-12-22
Abstract
No abstract record available.
Inventors
- 👤 William J Secrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:33
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/38; B29D30/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A COMBINATION OF PROCESSING SHEET MATERIAL UNDER CONSTANTLY UNIFORM TENSION ALONG ITS ENTIRE LENGTH COMPRISING TWO RUBBER CALENDERS ARRANGED IN TANDEM, A FABRIC TENSIONING DEVICE DISPOSED ON THE DELIVERY SIDE OF EACH CALENDER, EACH SAID TENSIONING DEVICE COMPRISING ROLLS OVER WHICH SAID SHEET MATERIAL PASSES IN FRICTIONAL CONTACT; A DRAG GENERATOR AT EACH TENSIONING DEVICE HAVING A DRIVING CONNECTION WITH ONE OF SAID ROLLS, A PNEUMATIC COMPENSATOR BETWEEN SAID CALENDERS, SAID COMPENSATOR HAVING A ROLL HELD BY PNEUMATIC PRESSURE AGAINST SAID SHEET MATERIAL AND ADAPTED TO APPLY A CONSTANT FORCE NORMAL TO THE PLANE THEREOF, A FIRST RHEOSTAT AND A SECOND
Claim 2
Dependent Claim
101 words
A COMBINATION OF PROCESSING SHEET MATERIAL UNDER CONSTANTLY UNIFORM TENSION ALONG ITS ENTIRE LENGTH COMPRISING TWO RUBBER CALENDERS ARRANGED IN TANDEM, A FABRIC TENSIONING DEVICE DISPOSED ON THE DELIVERY SIDE OF EACH CALENDER, EACH SAID TENSIONING DEVICE COMPRISING ROLLS OVER WHICH SAID SHEET MATERIAL PASSES IN FRICTIONAL CONTACT; A DRAG GENERATOR AT EACH TENSIONING DEVICE HAVING A DRIVING CONNECTION WITH ONE OF SAID ROLLS, A PNEUMATIC COMPENSATOR BETWEEN SAID CALENDERS, SAID COMPENSATOR HAVING A ROLL HELD BY PNEUMATIC PRESSURE AGAINST SAID SHEET MATERIAL AND ADAPTED TO APPLY A CONSTANT FORCE NORMAL TO THE PLANE THEREOF, A FIRST RHEOSTAT AND A SECOND
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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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |