Method and apparatus for detecting the positions of articles tra

Details Method and apparatus for detecting the positions of articles tra Method and apparatus for detecting the positions of articles tra

1991-04-15

1992-12-01

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250341, 250223R, 209524, 356385, 378 54, G01N 2100

Patent

active

051681633

ABSTRACT:
The invention is preferably used for detecting the positions of articles made to advance on a belt conveyor or the like. The device comprises a radiation emitter located so that its radiation is propagated through the conveyor belt. The detection is preferably effected by a pair of detectors arranged adjacent each other so as to generate a signal which indicates that two articles are spaced apart only when both of the detectors are struck simultaneously by the radiation generated by the emitter.

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patent: 5044002 (1991-08-01), Stein

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