Photographic film cassette

Details Photographic film cassette Photographic film cassette

1991-06-27

1993-07-13

Stodola, Daniel P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 718, G03B 1726

Patent

active

052266133

ABSTRACT:
A pair of flanges are rotatably and pivotably support on a spool of a film cassette near its two ends for defining positions of both lateral edges of photographic film. Each flange consists of a disk and a circumferential lip. A pair of lips are formed on the disks in the flanges along peripheries thereof and project face to face with each other for contact with edges of an outermost turn of the film. The film is prevented from loosening by the lips. Ridges inside a cassette shell force the flanges to pivot, with respect to the axis of rotation of the spool, against the film wound in a roll. Both side faces of the film wound in a roll are partly clamped in a state with the flanges out of the vertical relative to the spool. Both lateral sides of a leading end portion of the film are cut off. An interval between the lateral edges of the film is smaller than a minimum interval between opposing circumferential edges of the lips. In a preferred embodiment, a pair of projections are formed on an inside of the cassette shell near the film passageway for projecting to be in contact with the circumferential edges of the lips, and keep the flanges out of the vertical in addition to the ridges.

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