Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1998-04-07
2000-01-11
Walsh, Donald P.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209580, 209587, 209588, 209639, 209938, 250226, 356425, B07C 5342, G01J 350
Patent
active
060138874
ABSTRACT:
A color-sorting machine for granular materials optically detects raw material grains falling along a substantially fixed path and sorts out no-good grains by color. An optical detection unit to this end comprises a condenser lens, a plurality of optical filters and a plurality of light-receiving sensors corresponding to the filters and can detect a plurality of wavelengths. The light-receiving sensors lie side by side on the same plane, are formed in a unit body, require no positioning adjustment among the light-receiving sensors, and make it possible to reduce the size of the optical system. A prism is provided between the condenser lens and the light-receiving sensors. The prism has light path diffraction surfaces of the same number as the light-receiving sensors, so that the light-receiving sensors receive light of the same point of view and can perform color sorting. Detected light partition plates are provided between adjacent light path diffraction surfaces of the prism and between the corresponding adjacent light-receiving sensors to improve the precision of optical detection.
REFERENCES:
patent: 5487472 (1996-01-01), Satake et al.
patent: 5638961 (1997-06-01), Satake et al.
patent: 5773058 (1998-07-01), Satake et al.
Ito Takafumi
Satake Satoru
Martin Brett C.
Satake Corporation
Walsh Donald P.
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