Locking carton bottom

Details Locking carton bottom Locking carton bottom

1988-02-24

1989-04-18

Marcus, Stephen

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

229156, B65D 510

Patent

active

048219495

ABSTRACT:
A paperboard carton having a self-locking bottom for holding heavy produce and the like which may be made with minimum waste and cutout material. The minor or width flaps have an inwardly folding flap locking segment which, then folded, defines a generally rectangular opening centrally located along the outer edge of the minor flaps. The major or width flaps have a flap locking slit formed therein. An assembly flap hingedly formed in the major flap may be folded inwardly to create an assembly slot along a portion of the flap locking slit. Locking edges of the rectangular opening in the minor flaps engage a locking edge of the slits in the major flap to securely form the carton bottom

REFERENCES:
patent: 526782 (1894-10-01), Howe et al.
patent: 1997667 (1935-04-01), Woerner, Jr.
patent: 2053857 (1936-09-01), Weiss
patent: 2339224 (1944-01-01), Shina
patent: 2361603 (1944-10-01), Cohen et al.
patent: 2990993 (1961-07-01), Buttery
patent: 3539090 (1970-11-01), Blasdell
patent: 4279377 (1981-07-01), Peeples et al.
patent: 4367840 (1983-01-01), McFadden
patent: 4650112 (1987-03-01), Booth
patent: 4702408 (1987-10-01), Powlenko
"Exhibits B & C" by Crown Zellerbach Corp., 9-12-83, 8-8-84.

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