Reflectance ratio sorting apparatus

Details Reflectance ratio sorting apparatus Reflectance ratio sorting apparatus

1981-09-14

1983-01-25

Reeves, Robert B.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Condition responsive means controls separating means

209580, 209582, 209587, 250341, 356 72, 356418, B07C 5342

Patent

active

043698867

ABSTRACT:
An infrared light generator directs a flashing band of light across a conveyor belt carrying randomly spaced materials having differing properties. The frequency of the flashing band sequentially alternates between two infrared frequencies chosen for their peculiar reflectivity characteristics. Infrared light sensitive cells detect energy reflected from the passing materials as they are exposed to the infrared light. Comparator circuitry examines the detected information, determining the size and material nature of the passing pieces. Powered paddles act at the direction of the comparator, physically separating variously sized inorganic from organic materials, or ripe from unripe comestibles, to cite examples.

REFERENCES:
patent: 2678725 (1954-05-01), Jacobson
patent: 3675769 (1972-07-01), Story
patent: 3776381 (1973-12-01), Wood
patent: 4081362 (1978-03-01), Chamberlin et al.
patent: 4095696 (1978-06-01), Sherwood
patent: 4120402 (1978-10-01), Swanson
patent: 4134498 (1979-01-01), Jones et al.
patent: 4186836 (1980-02-01), Wassmer et al.

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