Patent US2522346A successfully refreshed from Google Patents.
US2522346A
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Method of producing tubes from two heat-sealable films
Assignee: Wingfoot Corp
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Filing: 1947-12-27
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Granted: 1950-09-12
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Expires: 1967-12-27
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Carson
- 👤 James E Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C53/00; B29C53/36; B29C65/022; B29C65/026; B29C65/10; B29C65/106; B29C65/18; B29C65/74; B29C66/00; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/137; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/432; B29C66/70; B29C66/73; B29C66/737; B29C66/7371; B29C66/73715; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C66/83221; B29C69/00; B29C69/001; B29C69/002; B29D; B29D22/00; B29D22/003; B31; B31B; B31B70/00; B65; B65D; B65D3/00; B65D3/22; B65D35/00; B29C66/71; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; B31B2155/00; B31B2155/002; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF FORMING TUBES FROM FILMS OF HEAT-SEALABLE MATERIAL WHICH COMPRISES ROLLING UP AT LEAST TWO PLIES OF HEAT-SEALABLE FILM WITH A NON-HEAT-SEALABLE LINER BETWEEN EACH TWO PLIES OF THE HEAT-SEALABLE FILM, WITH THE EDGES OF THE FILM AND LINER MATERIAL IN SUBSTANTIAL ALIGNMENT, HEATING THE EDGES OF THE ROLL SO AS TO UNITE CONTACTING EDGES OF THE FILM, THE PRESENCE OF THE LINER PREVENTING UNION OF THE EDGES OF FILM SEPARATED BY THE LINER, WHEREBY THE EDGES OF EACH TWO PLIES OF THE FILM ARE SEPARATELY UNITED TO FORM A TUBE OF THE FILM MATERIAL.
Claim 2
Independent Claim
97 words
THE METHOD OF FORMING TUBES FROM FILMS OF HEAT-SEALABLE MATERIAL WHICH COMPRISES ROLLING UP AT LEAST TWO PLIES OF HEAT-SEALABLE FILM WITH A NON-HEAT-SEALABLE LINER BETWEEN EACH TWO PLIES OF THE HEAT-SEALABLE FILM, WITH THE EDGES OF THE FILM AND LINER MATERIAL IN SUBSTANTIAL ALIGNMENT, HEATING THE EDGES OF THE ROLL SO AS TO UNITE CONTACTING EDGES OF THE FILM, THE PRESENCE OF THE LINER PREVENTING UNION OF THE EDGES OF FILM SEPARATED BY THE LINER, WHEREBY THE EDGES OF EACH TWO PLIES OF THE FILM ARE SEPARATELY UNITED TO FORM A TUBE OF THE FILM MATERIAL.
References Cited (Backward Citations)
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US2232640A
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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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |