Photographic film

Details Photographic film Photographic film

1995-10-13

1997-03-04

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Structurally defined

430501, 352241, G03C 1765

Patent

active

056078234

ABSTRACT:
A photo film includes first and second edges (2a) extended in a length direction (X), and perforations (3) formed between at least the first edge and an effective frame region (2b) and arranged in the length direction at a regular pitch. The perforations (3) respectively include first to fourth corners (3a, 3b). The first and second corners (3b) are located close to the effective frame region (2b). The third and fourth corners (3a) are located close to the first edge (2a). At least the first corner (3b) of the perforations is curved at a radius (Ri) of curvature of 0.03 mm or less. The first corner is torn when tensile force applied to the perforations comes up to a critical value, and induces cutting of the effective frame region crosswise to the length direction.

REFERENCES:
patent: 4340663 (1982-07-01), Mikawa et al.
patent: 5338650 (1994-08-01), Iwagaki

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