Photography – Exposure data from film container
Patent
1997-07-18
1999-06-29
Lee, Eddie C.
Photography
Exposure data from film container
396408, 396515, 396538, G03B 724
Patent
active
059180803
ABSTRACT:
A photo film cassette contains a photo film, which is exited from a cassette shell when a spool is rotated in an unwinding direction. A data disk is integrally rotatable with the spool. The spool, if the photo film is unexposed, is stopped in an unexposed position with the bar code portion located in a first opening and with the quiet zone located in a second opening. The spool, if the photo film is partially exposed, all exposed or developed, is stopped in one of other predetermined positions. In a camera at first, a spool drive shaft is set in a reference position. To discern a used status of the cassette, after the camera is loaded with the cassette, the spool drive shaft is rotated in reverse to the unwinding. The spool drive shaft is engaged with the spool being in the initial position, to rotate the spool further. While the spool is rotated, the black and white bars and the quiet zone are detected with two photo sensors respectively through the first and second openings. As per a signal from the first photo sensor, it is determined whether the used status of the cassette is an unexposed status of the photo film. If the used status of the cassette is determined different from the unexposed status, then either one is determined between a partially exposed status and an exposed or developed status of the photo film as per a signal from the second photo sensor.
REFERENCES:
patent: 5541681 (1996-07-01), Cocca et al.
patent: 5666572 (1997-09-01), Tsuji et al.
patent: 5687414 (1997-11-01), Haraguchi et al.
patent: 5734939 (1998-03-01), Yamazaki et al.
Fuji Photo Film Co. , Ltd.
Lee Eddie C.
LandOfFree
Camera and method of discerning status of a photo film cassette does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Camera and method of discerning status of a photo film cassette, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Camera and method of discerning status of a photo film cassette will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1385890