US3587958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the tracking of continuous sheets of film
Assignee: WR Grace and Co
•
Filing: 1969-04-08
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Granted: 1971-06-28
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Expires: 1989-04-08
Abstract
Abstract A METHOD AND APPARATUS FOR CONTROLLING THE TRACKING OF A CONTINUOUS SHEET OF FILM WHOSE EDGES ARE TAUT COMPRISING MONITORING THE POSITION OF THE FILM EDGES AND PASSING THE FILM EDGES BETWEEN PAIRS OF OPPOSED ROLLERS SET AT A PREDETERMINED ANGLE SO THAT WHEN A ROLLER PAIR IS CLOSED IN RESPONSE TO THE EDGE MONITORING THE FILM MOVES IN THE DIRECTION OF THE CLOSED ROLLER PAIR.
Inventors
- 👤 Monroe F Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:27
CPC Classifications
B; B65; B65B; B65B41/00; B65B41/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |