Patent US3471743A successfully refreshed from Google Patents.
US3138513A
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Apparatus for sealing sheets having curved edges
Assignee: General Mills Inc
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Filing: 1961-01-27
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Granted: 1964-06-23
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Expires: 1981-01-27
Abstract
No abstract record available.
Inventors
- 👤 Robert H Duncanson
- 👤 Leroy E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:25
CPC Classifications
B; B31; B31F; B31F5/00; B31F5/06; B31F5/08; B31F5/085; B29; B29C; B29C63/00; B29C63/0026; B29C63/0034; B29C63/0039; B29C63/02; B29C63/024; B29C65/00; B29C65/02; B29C65/10; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/50; B29C65/5042; B29C65/5064; B29C65/5071; B29C65/5092; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/24; B29C66/244; B29C66/2442; B29C66/40; B29C66/41; B29C66/43; B29C66/80; B29C66/81; B29C66/816; B29C66/8161; B29C66/82; B29C66/822; B29C66/8221; B29C66/83; B29C66/836; B29C66/8362; B29C66/84; B29C66/865; B29C66/8652; B29C66/86521; B29C66/86531; B29C66/86533; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91231; B29C66/914; B29C66/9141; B29C66/91421; B29C66/9161; B29C66/92; B29C66/922; B29C66/9221; B29C66/924; B29C66/9241; B29C66/93; B29C66/934; B29C66/95; B29C66/70; B29C66/71; B29C66/91651; B29C66/91655; B29C66/93431; B29L; B29L2022/00; B29L2022/02; B29L2022/022; B29L2022/025; B29L2031/00; B29L2031/751
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A HEAT SEALING APPARATUS FOR SEALING TOGETHER THE EDGES OF TWO SHEETS OF PLASTIC MATERIAL WITH A FLEXIBLE TAPE COMPRISING MOVABLE SUPPORT MEANS, MEANS FOR GUIDING SAID SUPPORT MEANS ALONG SAID EDGES, MEANS FOR APPLYING THE TAPE IN A FOLDED CONDITION OVER SAID EDGES AS SAID SUPPORT MEANS MOVES ALONG THE EDGES, A SOURCE OF GASEOUS MEDIUM, MEANS FOR HEATING SAID GASEOUS MEDIUM, AND NOZZLE MEANS CARRIED BY SAID MOVABLE SUPPORT MEANS FOR DIRECTING HEATED GAS TO THE ENTIRE EXPOSED OUTER SURFACE OF SAID TAPE TO PRESS THE TAPE FIRMLY AGAINSST THE SHEETS AND THEREBY ADHERE SAID TAPE TO SAID EDGES.
Claim 2
Dependent Claim
101 words
A HEAT SEALING APPARATUS FOR SEALING TOGETHER THE EDGES OF TWO SHEETS OF PLASTIC MATERIAL WITH A FLEXIBLE TAPE COMPRISING MOVABLE SUPPORT MEANS, MEANS FOR GUIDING SAID SUPPORT MEANS ALONG SAID EDGES, MEANS FOR APPLYING THE TAPE IN A FOLDED CONDITION OVER SAID EDGES AS SAID SUPPORT MEANS MOVES ALONG THE EDGES, A SOURCE OF GASEOUS MEDIUM, MEANS FOR HEATING SAID GASEOUS MEDIUM, AND NOZZLE MEANS CARRIED BY SAID MOVABLE SUPPORT MEANS FOR DIRECTING HEATED GAS TO THE ENTIRE EXPOSED OUTER SURFACE OF SAID TAPE TO PRESS THE TAPE FIRMLY AGAINSST THE SHEETS AND THEREBY ADHERE SAID TAPE TO SAID EDGES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |