Camera having an upstream read only magnetic sensor to detect ex

Details Camera having an upstream read only magnetic sensor to detect ex Camera having an upstream read only magnetic sensor to detect ex

1996-07-26

1997-10-14

Metjahic, Safet

Photography

With data recording

Magnetically on film or film cassette

396390, 396392, G03B 1724

Patent

active

056780877

ABSTRACT:
In a camera having an exposure film gate and device for advancing a film strip past the gate, the film strip having successive image areas with a magnetic track adjacent to each image area, wherein one or more of the image areas are exposed and have information magnetically recorded in the adjacent magnetic track of an exposed image area, the improvement comprising a thin film read only magnetic sensor located relative to the film gate so as to be upstream of the gate when the means advances the film strip past the gate, the sensor reading each the magnetic track adjacent to an image area to determine whether the image area has been exposed or not so as to detect an unexposed image area before it is advanced to the film gate.

REFERENCES:
patent: 4291351 (1981-09-01), Pennell et al.
patent: 4589041 (1986-05-01), Voegeli
patent: 4965626 (1990-10-01), Robison et al.
patent: 5016030 (1991-05-01), Dwyer et al.
patent: 5229810 (1993-07-01), Cloutier et al.
patent: 5572268 (1996-11-01), Tamamura

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