Photography – With film drive – Mechanical detail
Patent
1995-03-09
1997-04-08
Blankenship, Howard B.
Photography
With film drive
Mechanical detail
396416, G03B 100
Patent
active
056197403
ABSTRACT:
A film loading apparatus for preventing the breakage or enlargement of a film perforation. The apparatus comprises a spool having catches each of which engages a perforation of film, and a film feeding member having a claw which reciprocatingly moves in synchronism with the rotation of the spool. No catch is provided at the portion of the spool which passes a film engaging position at the time of backward movement of the film feeding member and in a predetermined range between that portion and the portion which passes the film engaging position at the time of forward movement of the film feeding member. No catch is engaged with a perforation of the film during or immediately before backward movement of the film feeding portion, thereby preventing the breakage or enlargement of a film perforation. By providing a rib at the portion of the spool where no catch is provided and clamping the film between the rib and a film guide plate provided on the inner surface of back lid of the camera, film can be kept in a take-up waiting state, thereby facilitating the film winding operation.
REFERENCES:
patent: 5136313 (1992-08-01), Muramatsu et al.
English abstract and Figure of Japan 3-200947(A). Sep. 2, 1991.
Onda Kazuhiko
Tanaka Yasuhiko
Blankenship Howard B.
Fuji Photo Optical Co. Ltd
Snider Ronald R.
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