Package with peelable portion for light sensitive materials

Details Package with peelable portion for light sensitive materials Package with peelable portion for light sensitive materials

1989-08-24

1990-09-11

Fidei, David T.

Special receptacle or package

For plate or sheet

Fragile or sensitive

2064842, B65D 6540

Patent

active

049554794

ABSTRACT:
A package comprising first, second and third flexible panels of light-blocking material secured together for holding light sensitive sheet materials therein, with one of the panels being arranged to be completely peeled away and separated from the other panels to provide access to the materials within the package. The package is arranged for insertion into a rigid container where the sheets can be removed for processing. The package comprises a lower panel, a first upper panel, and a second upper panel. Each of the panels is formed of a web of flexible, light-blocking, material, e.g., a laminate of polyester and polyethylene, one or both of which incorporating a light blocking agent. The lower panel has a leading edge, a trailing edge, and a pair of side edges. The first upper panel has a leading edge, a trailing edge, and a pair of side edges. The second upper panel has a leading edge, a trailing edge, and a pair of side edges. The first upper panel is secured to the lower panel by permanent heat seals extending adjacent their respective leading and side edges. The second upper panel is releasably secured to the lower panel by readily peelable seals extending adjacent their respective trailing and side edges, while also being releasably secured to the first upper panel by a readily peelable seal extending adjacent the leading edge of the second upper panel and the trailing edge of the first upper panel.

REFERENCES:
patent: 1536341 (1925-05-01), Hodgson
patent: 2144453 (1939-01-01), Flynn
patent: 2310371 (1943-02-01), Lines et al.
patent: 3443093 (1969-05-01), Lindenmuth et al.
patent: 3779449 (1973-12-01), Membrino
patent: 3958693 (1976-05-01), Greene
patent: 4158409 (1979-06-01), Duinker
patent: 4306656 (1981-12-01), Dahlem
patent: 4363841 (1982-12-01), Snow
patent: 4438164 (1984-03-01), Pfeifer et al.
patent: 4543280 (1985-09-01), Fujita et al.
patent: 4550048 (1985-10-01), Nakagawa
patent: 4784906 (1988-11-01), Akao
patent: 4787506 (1988-11-01), Akao

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