US3623929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing spiral wound container
Assignee: International Paper Co
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Filing: 1968-12-19
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Granted: 1971-11-30
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Expires: 1988-12-19
Abstract
Abstract A METHOD AND APPARATUS FOR PRODUCING SPIRAL WOUND CONTAINERS IN WHICH A PLURALITY OF PLIES, COATED ON AT LEAST ONE SURFACE WHICH A THERMOPLASTIC COATING WITH THE INNER PLY COATED ON ITS INNER SURFACE WITH A SLIP OR SANITARY COATING, ARE OVERLAPPED ALONG ADJOINING EDGES AND SPIRALLY WOUND ONTO A MANDREL HEATED AND ADHESIVELY SECURED WITH A THERMOPLASTIC COATING TO FORM A MULTI-PLY SPIRALLY WOUND TUBE AND THE SPIRALLY WOUND TUBE IS CUT INTO CAN LENGTH UNITS, THE ENDS OF THE UNITS ARE FLARED AND CAN ENDS ARE ATTACHED.
Inventors
- 👤 Thomas M Wannamaker
- 👤 Charles I Carter
- 👤 Rupert O Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:33
CPC Classifications
B; B65; B65D; B65D15/00; B65D15/02; B65D15/04; B65D15/06; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C63/00; B29C63/02; B29C63/04; B29C63/08; B29C63/10; B29C63/105; B31; B31C; B31C3/00; B31C3/04; B65D3/00; B65D3/22; B65H; B65H81/00; B65H81/06; B65H81/08; B29C2793/00; B29C2793/009; B29C65/00; B29C65/02; B29C65/10; B29C65/106; B29C66/00; B29C66/40; B29C66/41; B29C66/45; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83415; B29C66/83431; B29C66/83433; B29K; B29K2711/00; B29K2711/12; B29K2711/123
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |