US3924796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging containers
Assignee: Tetra Pak AB
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Filing: 1972-06-27
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Granted: 1975-12-09
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Expires: 1992-06-27
Abstract
Abstract A packaging container and method of making same in which the finished container has a sealing fin extending upwardly from the top of the container and transversely of the container, said fin comprising two sections of the container blank which are heat sealed together by the use of a layer of thermoplastic material on the sections said layer being molecularly oriented in the longitudinal direction of the fin so that opening of the package may be facilitated.
Inventors
- 👤 Gad Anders Rausing
- 👤 Sven Olof Soren Stark
- 👤 Sven Gosta Uno Sevrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:36
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B29; B29C; B29C48/00; B32B27/30; B32B27/302; B32B5/00; B32B5/18; B65; B65D; B65D5/00; B65D5/02; B65D5/06; B65D5/067; B65D5/068; B65D5/42; B65D5/56; B65D5/563; B29C48/03; B29C48/07; B29C48/08; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2307/00; B32B2307/50; B32B2307/514; B32B2325/00; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/249992; Y10T428/249993
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
IN A PACKAGING CONTAINER FORMED FROM A FLAT BLANK OF A POLYSTYRENE FOAM PACKAGING MATERIAL HAVING AT LAST ONE LAYER OF AT LEAST ONE HOMOGENEOUS THEREMOPLASTIC MATERIAL THEREON, THE CONTAINER HAVING, AT THE TOP THEREOF, A SEALING FIN EXTENDING UPWARDLY FROM THE TOP OF THE PACKAGE AND TRANSVERSELY THEREACROSS, SAID FIN BEING FORMED BY HEAT SEALING TOGETHER TWO SECTIONS OF THE BLACK, THE IMPROVEMENT WHEREIN THE AT LEAST ONE LAYER OF AT LEAST ONE HOMOGENEOUS THERMOPLASTIC MATERIAL IN THE LONGITUDINAL DIRECTION OF THE SEALING FIN ACROSS THE TOP OF THE CONTAINER, TO FACILITATE TEARING SAID FIN TO OPEN THE OF THE CONTAINER, TO FACILITATE TEARING SAID FIN TO OPEN THE CONTAINER.
Claim 2
Dependent Claim
111 words
IN A PACKAGING CONTAINER FORMED FROM A FLAT BLANK OF A POLYSTYRENE FOAM PACKAGING MATERIAL HAVING AT LAST ONE LAYER OF AT LEAST ONE HOMOGENEOUS THEREMOPLASTIC MATERIAL THEREON, THE CONTAINER HAVING, AT THE TOP THEREOF, A SEALING FIN EXTENDING UPWARDLY FROM THE TOP OF THE PACKAGE AND TRANSVERSELY THEREACROSS, SAID FIN BEING FORMED BY HEAT SEALING TOGETHER TWO SECTIONS OF THE BLACK, THE IMPROVEMENT WHEREIN THE AT LEAST ONE LAYER OF AT LEAST ONE HOMOGENEOUS THERMOPLASTIC MATERIAL IN THE LONGITUDINAL DIRECTION OF THE SEALING FIN ACROSS THE TOP OF THE CONTAINER, TO FACILITATE TEARING SAID FIN TO OPEN THE OF THE CONTAINER, TO FACILITATE TEARING SAID FIN TO OPEN THE CONTAINER.
Claim 3
Dependent Claim
27 words
A packaging container as claimed in claim 1 wherein the at least one homogeneous thermoplastic material is selected from the group consisting of polystyrene, polyethylene and polypropylene.
Claim 4
Dependent Claim
18 words
A packaging container as claimed in claim 1 wherein the at least one homogeneous thermoplastic material is polystyrene.
References Cited (Backward Citations)
US1157462A
Cited
US3175250A
Cited
US3203614A
Cited
US3386876A
Cited
US3383261A
Cited
US3688934A
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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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |