Heating jaw for impulse sealer
Abstract
Abstract THE HEATING JAW FOR A HEAT SEALER OF THE IMPULSE TYPE COMPRISES AN ELONGATED BLOCK OF INSULATING MATERIAL ON THE BOTTOM FACE OF WHICH THERE IS MOUNTED AN ELECTRICAL HEATING ELEMENT COMPRISING A PLURALITY OF RESISTOR STRIPS OF METAL OF HIGH SPECIFIC RESISTANCE ELECTRICALLY CONNECTED IN SERIES BUT PHYSICALLY SPACED APART TO ALLOW FOR EXPANSION AND CONTRACTION OF THE STRIPS WHEN AN IMPULSE OF CURRENT IS PASSED THERETHROUGH. THE BLOCK OF INSULATING MATERIAL HAS A VACUUM CHAMBER EXTENDING ALONG THE LENGHT THEREOF AND COMMUNCIATING WITH THE SPACES BETWEEN THE RESISTOR STRIPS SO THAT A LENGTH OF HEAT-SENSITIVE SPLICING TAPE CAN BE HELD ON THE JAW BY VACUUM WHEN SAID VACUUM CHAMBER IS EVACUATED.
Inventors
- 👤 Ronald E Griffith
- 👤 Hollis T Galley
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |