Self-locking cartons

Details Self-locking cartons Self-locking cartons

1979-06-04

1980-10-28

Moorhead, Davis T.

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

206806, B65D 508, B65D 506

Patent

active

042302595

ABSTRACT:
The disclosed carton has opposite front and back walls, a top or end panel hinged to the front wall, and a flap extending downward from the top panel inside the back wall. A tongue in the back wall is defined by side cuts and an end cut. A hang-up tab extends from the top-panel flap at a reverse bend, extending through said end cut and upward. A locking portion of the hang-up tab is wider than the tongue, thus having locking extremities. When the tab is initially shifted from inside the back wall downward through the end cut, its locking portion is disposed partly outside the tongue but the locking extremities are inside the carton. When the hang-up tab is thereafter forcibly swung outward, the locking portion flexes and its extremities emerge and lock the top panel closed. The top panel additionally has detents at the ends of its closing flap.

REFERENCES:
patent: 1135588 (1915-04-01), Kendrick
patent: 1798333 (1931-03-01), Marlowe et al.
patent: 1801389 (1931-04-01), Rumpel
patent: 2768778 (1956-10-01), Ferguson et al.
patent: 2850160 (1958-09-01), Siebel et al.
patent: 3814303 (1974-06-01), Smith
patent: 3977593 (1976-08-01), Rotman
patent: 4009821 (1977-03-01), Hambleton
patent: 4050625 (1977-09-01), Rice et al.

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