Method and device for detecting full condition in a receiving ma

Details Method and device for detecting full condition in a receiving ma Method and device for detecting full condition in a receiving ma

1993-03-10

1994-05-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250223R, G01N 2186

Patent

active

053110315

ABSTRACT:
To provide a simple way to control full magazine condition in apparatus where films driven to the receiving magazine rest therein one on the other, the method provides for the following steps: sending an IR light signal toward the films in the magazine; letting the signal be reflected by the last arrived film; collecting the reflected signal with a photosensor; having the photosensor emit an alarm signal when the intensity of the light collected thereby is greater than threshold value of the photosensor itself, thereby showing that the last arrived film is too near to the photosensor, because the magazine is full; repeating the above steps every time a film is fed. This method allows also film jammed detection out side the magazine.

REFERENCES:
patent: 3278754 (1966-10-01), Wallace
patent: 3902713 (1975-09-01), Von Luhmann et al.
patent: 4652742 (1987-03-01), Wauer et al.
patent: 4978845 (1990-12-01), Hill
patent: 5225689 (1993-07-01), Buckle et al.

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