Heat-sealable package blank for a video tape cassette

Details Heat-sealable package blank for a video tape cassette Heat-sealable package blank for a video tape cassette

1982-12-15

1985-06-04

Lowrance, George L.

Special receptacle or package

For holding a machine readable recording medium

For holding a tape cassette

220 76, 229 31, 229 33, 229 48T, B65D 85672

Patent

active

045209278

ABSTRACT:
A package blank is made from a single sheet having at least surface layers of heat-sealable material. The blank sheet comprises first and second rectangular panels foldably formed on opposite sides of a backstrip. The first and second panels have first and second pairs of foldable side flaps, respectively, extending from their opposite sides, and the backstrip has a pair of foldable back flaps extending from its opposite ends. The first side flap pair and the back flap pair have sloping edges located adjacent each other for forming at least partly overlapping seams when the blank is folded up into a generally boxlike, open-front package. The overlapping seams serve to prevent the intrusion into the package of heated air used for fusing the second side flap pair onto the first side flap pair and the back flap pair. At least either of the first side flap pair and the back flap pair is at least partly reduced in thickness to minimize the thickness of the overlapping seams and hence to avoid the surface irregularities of the overlying second side flap pair.

REFERENCES:
patent: 1319161 (1919-10-01), Miller
patent: 1470397 (1923-10-01), Smith
patent: 3108734 (1963-10-01), Hewko
patent: 3125280 (1964-03-01), Henry
patent: 3361325 (1968-01-01), Hakansson et al.
patent: 3610114 (1971-10-01), Kaminsky

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