Envelopes – wrappers – and paperboard boxes – Paperboard box – Collapsible along supplemental fold line
Patent
1991-06-17
1992-02-25
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Collapsible along supplemental fold line
220416, 229 23A, 22911705, 22912539, B65D 8822, B65D 8852
Patent
active
050906143
ABSTRACT:
A collapsible shipping container with integral folding slip sheet. Foldable interior walls provide double wall thickness at two of four oppositely disposed side walls, the double wall thickness also serving to reinforce the container against compressive forces at each of four corners. A flap-type lower wall is provided with a permanently attached foldable slip sheet to facilitate fork lift engagement. In a first embodiment, a lid or cover is also formed integrally and foldably attached to an upper peripheral edge along one rectilinear segment thereof. In another embodiment, hook and pile fasteners interconnect the flaps and slip sheet forming the lower wall to maintain the container in erected condition.
REFERENCES:
patent: 2226050 (1940-12-01), Chanbliss et al.
patent: 2678766 (1954-05-01), Leukoff
patent: 3007622 (1961-11-01), George
patent: 3565325 (1971-02-01), Pugsley
patent: 3642192 (1972-02-01), Wilcox, Jr. et al.
patent: 4138053 (1979-02-01), Gardner
patent: 4333602 (1982-06-01), Geschwender
patent: 4411373 (1983-10-01), Kupersmit
patent: 4595137 (1986-06-01), Kupersmit
patent: 4709852 (1987-12-01), Stoll
Elkins Gary E.
Temko Charles E.
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