US2999042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing plastic seam
Assignee: Bagcraft Corp of America
•
Filing: 1956-10-01
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Granted: 1961-09-05
•
Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Albert A Meister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:20
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/20; B29C66/21; B29C65/00; B29C65/02; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/305; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/432; B29C66/4322; B65; B65D; B65D88/00; B65D88/16; B65D88/1612; B29C66/49; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF HEAT SEALING TOGETHER TWO OVERLAPPED THICKNESSES OF FILM-LIKE THERMOPLASTIC PACKAGING MATERIAL, COMPRISING: MAINTAINING A FIRST HEAT AND PRESSURE APPLICATOR AT A TEMPERATURE SLIGHTLY ABOVE THAT NEEDED TO PRODUCE THERMOPLASTIC BONDING OF THE MATERIAL, MAINTAINING A SECOND HEAT AND PRESSURE APPLICATOR AT A TEMPERATURE ABOVE THAT OF THE FIRST APPLICATOR AND BELOW A CRITICAL "BURNING" TEMPERATURE FOR SAID MATERIAL, AND CONSECUTIVELY APPLYING EACH OF SAID APPLICATORS TO THE OVERLAPPED PORTIONS OF SAID MATERIAL IN SUCH A MANNER AS TO DEFINE EFFECTIVELY A SINGLE SEAM, INCREMENTAL PORTIONS OF WHICH HAVE BEEN MADE BY ONLY ONE OF EACH OF SAID APPLICATORS.
Claim 2
Independent Claim
101 words
A METHOD OF HEAT SEALING TOGETHER TWO OVERLAPPED THICKNESSES OF FILM-LIKE THERMOPLASTIC PACKAGING MATERIAL, COMPRISING: MAINTAINING A FIRST HEAT AND PRESSURE APPLICATOR AT A TEMPERATURE SLIGHTLY ABOVE THAT NEEDED TO PRODUCE THERMOPLASTIC BONDING OF THE MATERIAL, MAINTAINING A SECOND HEAT AND PRESSURE APPLICATOR AT A TEMPERATURE ABOVE THAT OF THE FIRST APPLICATOR AND BELOW A CRITICAL "BURNING" TEMPERATURE FOR SAID MATERIAL, AND CONSECUTIVELY APPLYING EACH OF SAID APPLICATORS TO THE OVERLAPPED PORTIONS OF SAID MATERIAL IN SUCH A MANNER AS TO DEFINE EFFECTIVELY A SINGLE SEAM, INCREMENTAL PORTIONS OF WHICH HAVE BEEN MADE BY ONLY ONE OF EACH OF SAID APPLICATORS.
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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) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |