Easily openable package of photographic photosensitive materials

Details Easily openable package of photographic photosensitive materials Easily openable package of photographic photosensitive materials

1992-06-26

1996-07-02

Robinson, Ellis P.

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

428 353, 428 76, 428124, 428194, 428200, 428212, 206455, 2064842, 383205, 383 88, B65D 8500, B32B 704, B32B 714

Patent

active

055320287

ABSTRACT:
An easily openable package of photographic photosensitive materials which comprises one or a plurality of photographic photosensitive materials and a light-shielding bag having a heat-sealed portion formed on the periphery and packaging the photographic photosensitive materials. The heat-sealed portion comprises a strongly joined portion and a weakly joined portion, the part surrounded by the strongly joined portion being larger than the photographic photosensitive materials being placed therein with a space, and the light-shielding bag being turned over at least at the edge of the photographic photosensitive materials on the opening side. The package is very easily openable and can ensure sealability, heat sealing properties and physical strength sufficiently.

REFERENCES:
patent: 4252846 (1981-02-01), Romesberg et al.
patent: 4337862 (1982-07-01), Suter
patent: 4407872 (1983-10-01), Horii
patent: 4574104 (1986-03-01), Aishima et al.
patent: 4708896 (1987-11-01), Akao
patent: 4780357 (1988-10-01), Akao
patent: 4876125 (1989-10-01), Akao et al.
patent: 4894264 (1990-01-01), Akao et al.
patent: 5026600 (1991-06-01), Akao
patent: 5141795 (1992-08-01), Kai et al.

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