Packaging bag for photosensitive materials and bag-making method

Details Packaging bag for photosensitive materials and bag-making method Packaging bag for photosensitive materials and bag-making method

1988-12-14

1990-05-15

Seidleck, James

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

2065241, 2065242, 383109, 383114, 383 84, 428212, 428515, B65D 3008, B65D 3014, B32B 2708

Patent

active

049257110

ABSTRACT:
A packaging bag for photosensitive materials has an opening and welded fin sides wherein the bag and comprises a folded cylindrical coextruded multilayer inflation film having at least one light-shielding layer containing a light-shielding material, said opening being formed of the uncut ends of the folded inflation film, and said welded fin sides being formed of both cut portions of the inflation film, and a bag-making method thereof.

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