Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1994-09-01
1997-02-18
Terrell, William E.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209588, 209938, 250226, B07C 5342
Patent
active
056034130
ABSTRACT:
A method of and apparatus for sorting plastic items is disclosed. The method comprises the steps of transmitting polychromatic light from a source through each individual item; detecting the quantity of light of a first color passing through each individual item with a detector opposed to the source as a stream of the items is successively directed past the source and the detector; detecting the quantity of light of a second color passing through each individual item with the detector, wherein the second color is different from the first color; and selectively removing individual items from the stream, the removal being based upon a comparison of the quantity of light of the first color detected and the quantity of light of the second color detected.
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Nguyen Tuan
Terrell William E.
Wellman, Inc.
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