Patent US3141804A successfully refreshed from Google Patents.
US3141804A
Expired / Lapsed
US
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Dielectric heat sealing
Assignee: Foils Packaging Corp
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Filing: 1961-07-18
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Granted: 1964-07-21
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Expires: 1981-07-18
Abstract
No abstract record available.
Inventors
- 👤 Don B Kauffeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; B65B51/22; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C66/00; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/135; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72321; B29C66/72327; B29C66/72328; B29C66/80; B29C66/81; B29C66/818; B29C66/8187; B29C66/81871; B29C66/71; B29C66/83; B29C66/832; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1064; Y10T156/1082; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF MAKING A DIELECTRIC-HEAT-SEALED CONTAINER PART FROM A SINGLE FOIL-CLAD PAPERBOARD TANK INCLUDING THE FOLLOWING STEPS: CUTTING A SERIES OF PARALLEL NARROW SLITS THROUGH THE FOIL BETWEEN PORTIONS OF THE BLANK TO BE SEALED TOGETHER; COATING THE SURFCES OF THE BLANK WITH HEAT-SEALABLE PLASTIC; BRINGING TOGETHER THE SAID PORTIONS OF THE BLANK; APPLYING PRESSURE THEREACROSS; AND COUPLING RATIO FREQUENTLY TO THE FOILS LOCATED ON OPPOSITE SIDES OF SAID SERIES OF SLITS TO ESTABLISH AN ELECTRIC FIELD THEREBETWEEN TO FUSE TOGETHER THE PLASTIC ON ABUTTING SURFACES WITHIN SAID FIELD.
Claim 2
Independent Claim
90 words
THE METHOD OF MAKING A DIELECTRIC-HEAT-SEALED CONTAINER PART FROM A SINGLE FOIL-CLAD PAPERBOARD TANK INCLUDING THE FOLLOWING STEPS: CUTTING A SERIES OF PARALLEL NARROW SLITS THROUGH THE FOIL BETWEEN PORTIONS OF THE BLANK TO BE SEALED TOGETHER; COATING THE SURFCES OF THE BLANK WITH HEAT-SEALABLE PLASTIC; BRINGING TOGETHER THE SAID PORTIONS OF THE BLANK; APPLYING PRESSURE THEREACROSS; AND COUPLING RATIO FREQUENTLY TO THE FOILS LOCATED ON OPPOSITE SIDES OF SAID SERIES OF SLITS TO ESTABLISH AN ELECTRIC FIELD THEREBETWEEN TO FUSE TOGETHER THE PLASTIC ON ABUTTING SURFACES WITHIN SAID FIELD.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |