Apparatus for color recognition and defect detection of objects

Classifying – separating – and assorting solids – Adhesion – Coated surface or mass

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209 75, 209 74M, 250223R, 356178, 356237, 198403, B07C 5342

Patent

active

040821889

ABSTRACT:
Method and apparatus for high-speed automatic inspection and processing of large numbers of solid discrete particular objects such as multicolored capsule dose forms in regard to color and/or defect detection, in which virtually all unacceptable material is isolated and an accurate running and total count of acceptable material is provided. The objects are transported in a number of channels past respective optical heads comprising an electro-optics system, the transport mechanism being arranged to provide signals representative of relative object location. One or more rotary transport drums communicating with the front end of the transport mechanism are also provided to enable additional viewing of the capsules in either or both "end-on" orientations, in order to effect a more complete body of information for defect detection. The electro-optics system is comprised operatively of separate color recognition and shape inspection subsystems. The color and shape signature information of an object is obtained by sampling photodetector outputs in dependence on the object position information from the transport mechanism and also the sensed specular peak by a computer-controlled arrangement. The signatures obtained are compared to stored reference signatures for color and shape, and output signals are developed from the comparison which are transmitted to a reject arrangement for isolating the unacceptble material.

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patent: 3616901 (1971-11-01), Groves
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patent: 3737239 (1973-06-01), Adams et al.
patent: 3757943 (1973-09-01), Chae et al.
patent: 3889591 (1975-06-01), Noguchi

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