Camera including multiple burst data to identify unexposed frame

Details Camera including multiple burst data to identify unexposed frame Camera including multiple burst data to identify unexposed frame

1994-03-25

1995-12-19

Wintercorn, Richard A.

354207, G03B 1724

Patent

active

054772893

ABSTRACT:
A camera of the prewind or normal wind type that writes data on a roll of film to indicate where specific frames on the roll of film have been exposed and unexposed and detects the presence of that data on the film to determine where additional exposures may be made on the roll of film. The camera writes data on the magnetically sensitive layer of the roll of film in bursts, wherein each burst is separated from each other burst with nonwritten portions of film. BY using one pattern of data and spaces for the marking of exposed frames and another pattern for unexposed frames, prewind and normal wind cameras can interchange partially exposed rolls of film without explicitly decoding magnetic data.

REFERENCES:
patent: 4860037 (1989-08-01), Harvey
patent: 4864332 (1989-09-01), Harvey
patent: 4878075 (1989-10-01), Cannon
patent: 5006873 (1991-04-01), Wash
patent: 5016030 (1991-05-01), Dwyer et al.
patent: 5017326 (1991-05-01), Wash et al.
patent: 5130745 (1992-07-01), Cloutier et al.
patent: 5325138 (1994-06-01), Nagata

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