Low stress flat end closure arrangement for thermoplastic coated

Details Low stress flat end closure arrangement for thermoplastic coated Low stress flat end closure arrangement for thermoplastic coated

1987-12-07

1988-11-22

Marcus, Stephen

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

229 31, 22912515, 22912517, B65D 506, B65D 508

Patent

active

047859938

ABSTRACT:
A flat end closure arrangement for a paperboard carton which may include an aluminum foil barrier, wherein there are no overstressed folds and a minimum buildup of thickness, to minimize the tendency for fractures of the respective barriers to occur. Two oppositely disposed closure panels include provisions for the edge portions of their center segments to overlap one another, while being covered by the remaining two oppositely disposed closure panels. More specifically, the underlying closure panels each includes score lines which converge toward the respective free edges of the panels, while one includes one horizontal score line connecting two parallel vertical score lines which define the center segment for folding back onto the closure panel beneath the center segment of the other closure panel.

REFERENCES:
patent: 3281048 (1966-10-01), Koltz et al.
patent: 3327920 (1967-06-01), Hynes et al.
patent: 4267957 (1981-05-01), Holmstrom
patent: 4691858 (1987-09-01), Peer, Jr.

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