Patent US3564809A successfully refreshed from Google Patents.
US3564809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic heat seal packaging machine and method
Assignee: Individual
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Filing: 1968-10-08
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Granted: 1971-02-23
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Expires: 1988-10-08
Abstract
Abstract A PACKAGE SEALER HAVING A PAIR OF OPPOSITELY DISPOSED L SHAPED HEAT SEALING-FILM SEVERING BARS FOR PACKAGING ARTICLES IN CENTRE FOLDED, HEAT SEALABLE PLASTIC FILM IS FULLY AUTOMATIC. THE SUCCESSIVE ARTICLES ARE AUTOMATICALLY FED LATERALLY BETWEEN THE PLIES OF THE FILM, THEN MOVED LONGITUDINALLY TO BETWEEN THE HEATING BARS FOR A PREDETERMINED DWELL DURING HEATING AND SEVERING AND THEN MOVED AWAY FROM THE BARS. THE L SHAPED HEATING BARS ARE EACH SUPPORTED AT THREE POINTS ON PISTONS OF AIR CYLINDERS, TO MOVE TOWARD THE CENTRE OF THE HEIGHT OF EACH PACKAGE AND APPLY EQUALIZED HEATING AND SEVERING PRESSURE ON THE FILM AT THAT HEIGHT.
Inventors
- 👤 James G Keramas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:40
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/06
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |