Photo film take-up spool and shaft

Details Photo film take-up spool and shaft Photo film take-up spool and shaft

1997-09-22

1998-11-17

Lee, Eddie C.

Photography

Disposable or recyclable camera

396388, 396411, 396429, 396538, G03B 1702

Patent

active

058389989

ABSTRACT:
A take-up shaft is adapted to taking up photo film from a photo film cassette having the photo film, and particularly used in a lens-fitted photo film unit. The photo film cassette includes a cassette spool on which the photo film is wound in a roll form. A cassette shell contains the cassette spool in rotatable fashion. The take-up shaft has a shaft body (46, 53, 72, 81) having a substantially cylindrical shape. A nip device (47, 52, 73) is disposed inside the shaft body, and nips a leader (26b) in removable fashion. The shaft body is rotated with the leader, to wind the photo film in a roll form (26a). At least one curved face (46c, 53c, 57b, 62b, 64c, 72a, 81a) is formed between the inside of the shaft body and a cylindrical face of the shaft body and at a radius of curvature 0.4-0.85 time as long as a radius of the shaft body, and prevents the leader secured to the shaft body from being sharply bent.

REFERENCES:
patent: 649694 (1900-05-01), Hunter
patent: 1141441 (1915-06-01), Campbell
patent: 3420154 (1969-01-01), Lieser et al.
patent: 4161298 (1979-07-01), Davis
patent: 4531684 (1985-07-01), Mills
patent: 4832275 (1989-05-01), Robertson
patent: 4884087 (1989-11-01), Mochida et al.
patent: 4954857 (1990-09-01), Mochida et al.
patent: 4984751 (1991-01-01), Hoffacker et al.
patent: 5353079 (1994-10-01), Sakai et al.
patent: 5487513 (1996-01-01), Takahashi et al.

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