Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1984-02-24
1986-11-25
Reeves, Robert B.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209587, B07C 5342
Patent
active
046243682
ABSTRACT:
The invention relates to a color sorting apparatus for granular objects in which detecting members (11, 11') for detecting acceptable objects and unacceptable objects respectively include light emitting members (9, 9; 9', 9') to send light to a sorting path (A), background light members (10; 10') to provide a reference amount of light, and light receiving members (8; 8') for receiving light coming from the objects in the sorting path and from the background light members; a valve actuating member (40) is responsive to the light receiving members for producing an ejection signal for unacceptable objects; ejection members (12, 13) are responsive to the valve actuating members for ejecting unacceptable objects; and adjusting members (19, 19) are responsive to the light receiving members for automatically adjusting the amount of light emitted from the background light members. The background light members (10, 10') include light sources (31, 31') which are adjusted by the adjusting members (19, 19) such that there is substantially no difference between the amount of light received by the light receiving members in the case where no objects exist in the sorting path and the amount of light in the case where acceptable objects exist therein even where the color tone of the acceptable objects is varied while in operation.
REFERENCES:
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patent: 4252240 (1981-02-01), Satake
patent: 4371081 (1983-02-01), Satake
patent: 4454029 (1984-06-01), Codding
Reeves Robert B.
Satake Engineering Co. Ltd.
Wacyra Edward M.
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