US4280648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded paper pulp container
Assignee: Keyes Fibre Corp
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Filing: 1979-11-13
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Granted: 1981-07-28
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Expires: 1999-11-13
Abstract
Abstract A molded paper pulp container comprising a pocketed section mutually hinged to a flat bottom cover section, both said sections comprising tapered walls bordering on said hinge, the external surfaces of said tapered walls bordering on said hinge comprising projecting abutting elements cooperating together to limit the inverted folding around said hinge. The molded paper pulp containers, mainly egg cartons, may be stacked in their flat open condition with the bottoms of the cover sections of a number of stacked containers maintained parallel thus allowing easy unstacking by mechanical devices such as suction-cups equipped unstackers.
Inventors
- 👤 Leon Boursier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:47
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/30; B65D85/32; B65D85/324
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A molded pulp container comprising a pocketed bottom section mutually hinged to a flat bottom cover section, both said sections comprising tapered walls bordering on said hinge, the external surfaces of said tapered walls bordering on said hinge having projecting abutting elements which cooperate together to limit inverted folding around said hinge.
Claim 2
Dependent Claim
52 words
A molded pulp container comprising a pocketed bottom section mutually hinged to a flat bottom cover section, both said sections comprising tapered walls bordering on said hinge, the external surfaces of said tapered walls bordering on said hinge having projecting abutting elements which cooperate together to limit inverted folding around said hinge.
Claim 3
Dependent Claim
39 words
A molded pulp container according to claim 1 in which windows are formed in the tapered walls bordering on said hinge, and the abutting elements are provided around at least a part of the windows bordering on the hinge.
Claim 4
Dependent Claim
49 words
A molded pulp container according to claim 1 in which at least one supplementary abutting element is formed in the external surface of the tapered wall of the cover section opposite to the hinge, this abutting element cooperating with the cover section of the underlying container in the stack.
Claim 5
Dependent Claim
43 words
A molded pulp container according to claim 3 in which the abutting elements are formed by an increased deposit of pulp in the area under the lower part of the windows provided in the edge of the tapered walls of the cover section.
Claim 6
Dependent Claim
43 words
A molded pulp container according to claim 3 in which the supplementary abutting element is formed by an increased deposit of pulp between the edge of the tapered wall of the cover section and openings provided in said wall for receiving closure hooks.
References Cited (Backward Citations)
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Cited
US4127189A
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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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |