Heat sealing apparatus and method
Abstract
Abstract Heat sealing apparatus for sealing a closure on the upper end of a thermoplastic container includes a continuously rotating annular heating plate that is continuously heated throughout its angular extent by electrical resistance means. A plurality of container holders are uniformly spaced apart beneath the annular heating plate. Each container is supported on a holder which prevents misalignments thereof and carriers the container along a circular path beneath the annular heating plate. Cam means serve to raise and lower the container holders during revolution of the container holders about the circular path to press each container closure against the heating plate momentarily and effect sealing of the closure member to the container lip. Yielding means in the system for mounting the container holders protect the containers from being damaged as the closures are pressed against the heating plate.
Inventors
- 👤 R Mistarz
- 👤 A Mojonnier
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |