US4078715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing container
Assignee: Tetra Pak AB
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Filing: 1974-04-15
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Granted: 1978-03-14
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Expires: 1994-04-15
Abstract
Abstract A packing container formed from a blank of thermo-plastic coated paper or cardboard erected into a rectangular body and provided with a top closure established by a bellows folding technique which terminates in a folded-down fin that is held in place against the adjacent container wall.
Inventors
- 👤 Goran Larsson
- 👤 Lars Carlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:44
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/02; B65D5/06; B65D5/061; B65D5/062; B65D5/064; B65D5/065; Y; Y10; Y10S; Y10S229/00; Y10S229/915
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
In a rectangular package composed of a packaging material coated on both sides with at least one layer of a thermoplastic coating material, said package being of the type having a top closure including a fin formed by a face to face seal of the outer portions of two opposed top closure flaps of opposed walls and triangular folds of the two closure flaps of the other opposed walls, said top closure being capable under a load to lie flat in a substantially plane end face, the improvement comprising crease lines between the outer portions of the two opposed top closure flaps of the opposed walls which form the fin and the inner portions of said flaps, one of said crease lines having a harder crease than the other of said crease lines so that said sealed fin will normally lean at an acute angle to the vertical in a direction toward the harder crease line so as to facilitate forming the substantially plane end face when subjected to a load.
Claim 2
Dependent Claim
171 words
In a rectangular package composed of a packaging material coated on both sides with at least one layer of a thermoplastic coating material, said package being of the type having a top closure including a fin formed by a face to face seal of the outer portions of two opposed top closure flaps of opposed walls and triangular folds of the two closure flaps of the other opposed walls, said top closure being capable under a load to lie flat in a substantially plane end face, the improvement comprising crease lines between the outer portions of the two opposed top closure flaps of the opposed walls which form the fin and the inner portions of said flaps, one of said crease lines having a harder crease than the other of said crease lines so that said sealed fin will normally lean at an acute angle to the vertical in a direction toward the harder crease line so as to facilitate forming the substantially plane end face when subjected to a load.
Claim 3
Dependent Claim
59 words
In a package as claimed in claim 1 wherein the two opposed top closure flaps which form the fin have a depth substantially equal to the width of said other opposed walls of the package so that when folded down the flap having the crease line of lesser crease will extend over the entire top closure of said package.
References Cited (Backward Citations)
US1288132A
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US2523246A
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US2959336A
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US3122300A
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FR1247747A
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US3083890A
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US3232514A
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US3549080A
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US3498524A
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US3797726A
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US3795359A
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US3869078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |