Patent US2711780A successfully refreshed from Google Patents.
US2711780A
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Method and apparatus for butt welding thermoplastic material
Assignee: General Mills Inc
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Filing: 1950-04-24
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Granted: 1955-06-28
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Expires: 1970-04-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond I Hakomaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/87; B29C66/872; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/74; B29C65/743; B29C65/7439; B29C65/749; B29C66/01; B29C66/03; B29C66/034; B29C66/0342; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/133; B29C66/137; B29C66/32; B29C66/326; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/435; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/82; B29C66/822; B29C66/8221; B29C66/83; B29C66/832; B29C66/8324; B29C66/836; B29C66/8362; B29C66/84; B29C66/865; B29C66/8652; B29C66/86521; B29C66/86531; B29C66/86533; B29L; B29L2022/00; B29L2022/02; B29L2022/022; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
THE METHOD OF WELDING RELATIVELY THIN LAYERS OF THERMOPLASTIC SHEET MATERIAL WHICH COMPRISES SUPERIMPOSING THE FREE EDGE PORTIONS OF THE LAYERS WITH THE EDGES PROJECTING IN THE SAME DIRECTION, MELTING THE SUPERIMPOSED EDGE PORTIONS ALONG THE LINE OF THE DESIRED WELD TO FORM A SEAM BETWEEN THE LAYERS AT A POINT SPACED INWARDLY OF THE EDGES THEREBY SEVERING THE UNDESIRED EXCESS MATERIAL AT SAID EDGES, POSITIONING THE SEAM AND THE PORTIONS OF THE WELDED LAYERS AT EACH SIDE OF THE SEAM IN SUBSTANTIALLY COPLANAR RELATION WITH THE LAYERS EXTENDING FROM THE SEAM IN OPPOSITE DIRECTIONS, AND COOLING THE MELTED MATERIAL TO STIFFEN THE SEAM WHILE SAID PORTIONS ARE HELD IN COPLANAR POSITION.
References Cited (Backward Citations)
US1899067A
Cited
US2220545A
Cited
US2232640A
Cited
US2289618A
Cited
US2360950A
Cited
US2467385A
Cited
US2509439A
Cited
US2535029A
Cited
US2495680A
Cited
US2556476A
Cited
US2524584A
Cited
US2627213A
Cited
US2546164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |