Camera with film feed correction

Details Camera with film feed correction Camera with film feed correction

1995-04-10

1996-07-02

Gray, David M.

3541731, G03B 1736

Patent

active

055327753

ABSTRACT:
A camera in which data, such as the date of photography, is recorded on film simultaneously with a film feed operation. A film feed control unit controls the feeding of film, and a data recording unit records data on the film. A pulse generator outputs a single train of pulse signals in synchronism with the film feeding action and these signals are used to control recording of data on the film, and to detect the end of film feed action for one frame of film. The camera also detects errors in the amount of film feed due to overrunning in the feeding of one frame. An overrun detection unit detects an amount of overrun based on the pulse signals, and compensates for the overrun during feeding of the next frame of film by subtracting the overrun amount from a standard feed amount. By subtracting the overrun amount from a normal feed amount for each film frame advance, errors in the amount of film feed due to the amount of overrunning are not accumulated.

REFERENCES:
patent: 4482227 (1984-11-01), Shiozawa et al.
Patent Abstracts of Japan, vol. 14, No. 66 (P-1003) 7 Feb. 1990 & JP-A-01 287 649 (Minolta) 20 Nov. 1989.
Patent Abstracts of Japan, vol. 4, No. 100 (P-19) 18 Jul. 1980 & JP-A-55 057 836 (Canon) 30 Apr. 1980.

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