Patent Number: 6,254,023

Title: Photo film cassette

Abstract: A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15-0.8 mm in contacting the one of the lateral edges of the photo film.

Inventors: Mochizuki; Tadashi (Kanagawa, JP), Watanabe; Seiichi (Kanagawa, JP), Shigesada; Keiji (Kanagawa, JP), Chino; Naoyoshi (Kanagawa, JP), Enomoto; Masahiro (Kanagawa, JP), Yasui; Mototada (Kanagawa, JP), Tomita; Akira (Kanagawa, JP)

Assignee: Fuji Photo Film Co., Ltd.

International Classification: G03C 3/00 (20060101); G03B 17/30 (20060101); G03B 023/02 ()

Expiration Date: 07/03/2018