Carton with sift-proof end closure

Details Carton with sift-proof end closure Carton with sift-proof end closure

1977-08-25

1978-04-11

Moorhead, Davis T.

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

229 48T, B65D 502

Patent

active

040834867

ABSTRACT:
A carton end closure in which an inner pair of closure flaps is provided with score lines extending parallel to and in close proximity to the inner edges of the closure flaps, the score lines defining grooves in the outer surfaces of the flaps, the inner flaps also being provided with trough defining debossed areas, preferably of triangular configuration, extending from the outer ends of the score lines to the inner corner edges of the inner flaps, a full width intermediate closure flap adapted to overlie the innermost flaps, the intermediate flap having score lines formed therein positioned to mate with the score lines in the inner flaps, so that when the flaps are infolded with a thin layer of adhesive interposed between the inner and intermediate flaps and sealing pressure applied, increments of adhesive will be forced into the troughs to form plugs which close and seal the corner edges of the end closure.

REFERENCES:
patent: 2322654 (1943-06-01), Moore
patent: 2596224 (1952-05-01), Eaton et al.
patent: 3191847 (1965-06-01), Moore
patent: 3746244 (1973-07-01), Bergstein
patent: 3981432 (1976-09-01), Bergstein et al.

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