US3695969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics web slitting and sealing
Assignee: British Visqueen Ltd
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Filing: 1970-08-20
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Granted: 1972-10-03
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Expires: 1990-08-20
Abstract
Abstract A METHOD AND DEVICE FOR SLITTING A PLASTICS WEB BY ADVANCING IT CONTINUOUSLY PAST A HOT KNIFE INTERSECTING ITS PATH, TO SLIT THE WEB AND FROM A BEAD SEAL ALONG THE SLIT EDGES, IN WHICH A CURRENT OF AIR IS PASSED CONTINUOUSLY THROUGH THE SLIT IN THE WEB, IN THE VICINITY OF THE KNIFE, TO PREVENT OR REDUCE BUILD UP OF DEPOSITS ON THE KNIFE.
Inventors
- 👤 Peter Edward Highfield
- 👤 Gordon John Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/74; B29C65/743; B29C65/7439; B29C65/02; B29C65/18; B29C66/00; B29C66/80; B29C66/83; B29C66/836; B29C66/01; B29C66/347; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313
Claims Analysis
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |