US4221302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door construction for folding container
Assignee: CONTAINER SYSTEMS CORP
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Filing: 1977-08-12
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Granted: 1980-09-09
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Expires: 1997-08-12
Abstract
Abstract An improved door construction for collapsible reusable shipping containers and the like incorporating provision for maintaining the strength and integrity of the container against the hydraulic action of flowable contents when loaded. The container includes a plurality of interlocking flange elements capable of relative sliding movement in a vertical direction, but resisting movement in a horizontal plane.
Inventors
- 👤 Julius B. Kupersmit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:46
CPC Classifications
B; B65; B65D; B65D19/00; B65D19/02; B65D19/06; B65D19/08; B65D19/12; B65D19/20; B65D2519/00; B65D2519/00004; B65D2519/00258; B65D2519/00492; B65D2519/00497; B65D2519/00547; B65D2519/00577; B65D2519/00582; B65D2519/00636; B65D2519/00641; B65D2519/00736; B65D2519/00805; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
310 words
In a collapsable shipping container construction having a relatively rigid pallet, a plurality of interconnected side walls secured to said pallet, there being an opening for loading and unloading in the plane of one of said side walls, and a slidably mounted door selectively closing said opening, the improvement comprising: said container including first and second oppositely disposed side walls, and a third wall permanently interconnecting each of said first and second side walls, and disposed at a mutual right angle relative to each said wall; said first and second side walls having first and second free edges, respectively, bordering said loading opening; first and second elongated flange elements defining first channels therein fixedly secured to said first and second edges, respectively; each of said first and second flange elements being of generally E-shaped cross-section and defining a pair of parallel axially disposed channels therein, one of said channels engaging one of said first and second free edges, the other of said channels having an axially extending opening facing the interior of said container; said door extending substantially over the entire area of one side of said container, and having third and fourth free side edges overlying said first and second edges; third and fourth flange elements fixedly secured to said third and fourth edges, respectively, of said door, said third and fourth flange elements each defining an elongated U-shaped flange slidably engaged within one of the other of said channels in said first and second flange elements, whereby outward movement of said door relative to said container is prevented; said first and second flange elements each having a planar outwardly disposed surface slidably engaging a corresponding inwardly disposed surface on one of said third and fourth flange elements for preventing inward movement of said door relative to said container, and providing a substantial bearing surface for guiding sliding movement.
Claim 2
Dependent Claim
310 words
In a collapsable shipping container construction having a relatively rigid pallet, a plurality of interconnected side walls secured to said pallet, there being an opening for loading and unloading in the plane of one of said side walls, and a slidably mounted door selectively closing said opening, the improvement comprising: said container including first and second oppositely disposed side walls, and a third wall permanently interconnecting each of said first and second side walls, and disposed at a mutual right angle relative to each said wall; said first and second side walls having first and second free edges, respectively, bordering said loading opening; first and second elongated flange elements defining first channels therein fixedly secured to said first and second edges, respectively; each of said first and second flange elements being of generally E-shaped cross-section and defining a pair of parallel axially disposed channels therein, one of said channels engaging one of said first and second free edges, the other of said channels having an axially extending opening facing the interior of said container; said door extending substantially over the entire area of one side of said container, and having third and fourth free side edges overlying said first and second edges; third and fourth flange elements fixedly secured to said third and fourth edges, respectively, of said door, said third and fourth flange elements each defining an elongated U-shaped flange slidably engaged within one of the other of said channels in said first and second flange elements, whereby outward movement of said door relative to said container is prevented; said first and second flange elements each having a planar outwardly disposed surface slidably engaging a corresponding inwardly disposed surface on one of said third and fourth flange elements for preventing inward movement of said door relative to said container, and providing a substantial bearing surface for guiding sliding movement.
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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |