Moisture and gas-tight package that can be sealed by a film of t

Details Moisture and gas-tight package that can be sealed by a film of t Moisture and gas-tight package that can be sealed by a film of t

1986-02-04

1988-02-02

Marcus, Stephen

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

220405, 220410, 220462, 229169, 229172, 229 31, B65D 556

Patent

active

047224746

ABSTRACT:
A moisture-resistant package of the type which is in the form of a tray, constituted of a semirigid material such as corrugated cardboard, and including a bottom (10) and side walls (14, 16) articulated by fold lines to the bottom, and at least two horizontal flange members (24) articulated by fold lines along the upper edges of at least two of the side walls and extending toward the interior of the package in parallel with the bottom. The package includes an impermeable internal lining (28) constituted of a film of thermoplastic material which is applied by thermal molding against the interior faces of the bottom and side walls and which extends without discontinuity against the under face of the flange members (24) and folds over to apply against the upper face of the flange member.

REFERENCES:
patent: 2660362 (1953-11-01), Schilling
patent: 2688430 (1954-09-01), Brock
patent: 2737336 (1956-03-01), Moore
patent: 3430803 (1969-03-01), Nelson
patent: 3514012 (1970-05-01), Martin
patent: 3526186 (1970-09-01), Cornelius
patent: 3866816 (1975-02-01), Bemiss
patent: 3927821 (1975-12-01), Dunning
patent: 4056221 (1977-11-01), Piltz et al.
patent: 4202465 (1980-05-01), McLaren
patent: 4469258 (1984-09-01), Wright et al.

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