Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1988-05-19
1990-04-10
Focarino, Margaret A.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
250339, 250341, B07C 5342
Patent
active
049158279
ABSTRACT:
Method and apparatus for sorting desired pieces of material from undesired material present in mixtures thereof. A piece of material from a mixture of pieces of desired and undesired materials is irradiated with a plurality of wavelengths of near-infrared radiation. The absorptions by the irradiated piece of near-infrared radiation energy is measured at a plurality of wavelengths. The measured absorptions are sequentially compared to a successive series of predetermined different absorption criteria in a predetermined order, which criteria distinguish the desired material from undesired material. If the piece fails any one criterion, it is rejected, whereas if the piece passes all criteria, it is accepted as a desired piece.
REFERENCES:
patent: 3747755 (1973-07-01), Senturia et al.
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patent: 4286327 (1981-08-01), Rosenthal et al.
patent: 4466076 (1984-08-01), Rosenthal
patent: 4627008 (1986-12-01), Rosenthal
Focarino Margaret A.
Trebor Industries, Inc.
Wacyra Edward M.
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