US3673041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealer
Assignee: United States Department of the Army
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Filing: 1970-09-08
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Granted: 1972-06-27
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Expires: 1990-09-08
Abstract
Abstract HEAT SEALING OPPOSED THERMOPLASTIC SURFACES OF OPEN ENDED POUCHES, WHOSE SEALING SURFACES ARE LIKELY TO BE CONTAMINATED WITH LIQUIDS OR FATTY SUBSTANCES IS ACCOMPLISHED BY FORCING A TRANSVERSELY RADIUSED, HEATED SEALING BAR AGAINST THE OPPOSED UNSEALED SHEETS OF THE POUCH WHICH ARE SUPPORTED BY A RESILIENT ANVIL, THEREBY SQUEEZING THE CONTAMINANTS OUT OF THE SEALING AREA BEFORE THE SHEETS FUSE TOGETHER AND IN THOSE CASES WHERE SOLID PAR- TICULATE CONTAMINANTS ARE FOUND IN THE SEALING AREA UTILIZING STEAM FLUSHING TO CLEAN THE SEALING SURFACES PRIOR TO SEALING.
Inventors
- 👤 Gerald L Schulz
- 👤 Raymond T Mansur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:31
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/70; B29C66/73; B29C66/737; B29C66/7373; B29C66/80; B29C66/81; B29C66/812; B29C66/8126; B29C66/81264; B29C66/814; B29C66/8141; B29C66/81427; B29C66/8145; B29C66/81457; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/84; B29C66/849; B29C66/8491; B65; B65B; B65B51/00; B65B51/10; B65B51/14; B29C66/71; B29C66/81411; B29C66/81421; B29C66/81422; B29K; B29K2995/00; B29K2995/0037; B29K2995/007; Y; Y10; Y10T; Y10T156/00; Y10T156/14
Claims Analysis
Total Claims: 0
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |