Patent US3684620A successfully refreshed from Google Patents.
US3684620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heat sealing machine
Assignee: Individual
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Filing: 1968-04-25
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Granted: 1972-08-15
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Expires: 1988-04-25
Abstract
Abstract AN APPARATUS FOR CONNECTION OF PLANE ELEMENTS OF NATURAL OR SYNTHETIC MATERIAL WHICH COMPRISES A HOUSING AND A HEAT SOURCE FOR ACTIVATING OF THE GLUE LAYER ON A WORKPIECE AND SECURED TO THE HOUSING. A HOLDING DOWN MEMBER AND AN ELECTRODE ARE PROVIDED, BOTH BEING MOVABLE PERPEDICULARLY TOWARDS ONE OF SAID WORKPIECE AND WORKPIECE SUPPORT, RESPECTIVELY, AND THE ELECTRODE COOPERATES WITH THE HOLD-DOWN MEMBER. THE ABUTMENT EDGE PORTION OF THE HOLDING-DOWN MEMBER AS WELL AS THE WELDING PART OF THE ELECTRODE ARE SUBSTANTIALLY COMPLEMENTARY TO THE OVERLAPPING EDGE PARTS OF TWO WORKPIECES.
Inventors
- 👤 Richard Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:46
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; A; A43; A43D; A43D11/00; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/118; B29C66/1182; B29C66/40; B29C66/41; B29C66/43; B29C66/80; B29C66/81; B29C66/816; B29C66/8167; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C65/04; B29C65/18; B29C66/112; B29C66/1122; B29L; B29L2031/00; B29L2031/48; B29L2031/50
Claims Analysis
Total Claims: 0
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |