Folding box package of a liquid-tight, heat sealably coated comp

Details Folding box package of a liquid-tight, heat sealably coated comp Folding box package of a liquid-tight, heat sealably coated comp

1991-12-10

1992-09-01

Elkins, Gary E.

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

229 31, 229137, 229134, 493133, 493326, 493327, B65D 540

Patent

active

051432811

ABSTRACT:
The invention relates to a folding box of composite cardboard material coated heat sealably at least on the inside, which has a flat bottom to which two pairs of opposite triangular folding pockets are sealed lying flat. To prevent bubble formation on the inside of the package, more particularly those areas of the triangular folding pockets which are to be sealed to one another over their complete surface, due to steam forming in the composite cardboard material during the heat activation of the areas, the heat sealable coating is perforated right into the cardboard in the areas.

REFERENCES:
patent: 1698699 (1929-01-01), Andrews
patent: 3120335 (1964-02-01), Egleston et al.
patent: 3194474 (1965-07-01), Rumberger
patent: 3326708 (1967-06-01), Hawkins
patent: 3367556 (1968-02-01), Whitby
patent: 3388639 (1968-06-01), Rumberger
patent: 4508226 (1985-04-01), Davis et al.
patent: 4684058 (1987-08-01), Weber
patent: 4828539 (1989-05-01), Jonsson et al.

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