Classifying – separating – and assorting solids – Adhesion – Coated surface or mass
Patent
1977-06-03
1978-10-17
Rolla, Joseph J.
Classifying, separating, and assorting solids
Adhesion
Coated surface or mass
209580, 209587, 250226, 250339, 356178, B07C 5342
Patent
active
041204026
ABSTRACT:
A produce sorter is described for removing culls, for example green tomatoes from red tomatoes and for removing foreign objects such as dirt and debris. An image of the produce and the foreign objects passing a station is formed on a light diffusing plate. Light from the diffusing plate impinges upon two pair of phototransducers. The transducers are each preceded by a color filter. The color filters are selected so that one pair of transducers produces electrical signals corresponding to two colors or wavelengths and the other pair produce electrical signals corresponding to two different wavelengths. The filters for one pair of transducers are selected to pass red and green. When the red/green signals have a predetermined relationship a reject signal is generated to reject culls. Additionally, when the signals from the other pair of transducers have a predetermined relationship a reject signal is generated to reject foreign objects.
REFERENCES:
patent: 3435950 (1969-04-01), Suverkrop
patent: 3781554 (1973-12-01), Krivoshiev et al.
patent: 3821550 (1974-06-01), Priest
patent: 3980181 (1976-09-01), Hoover et al.
patent: 3981590 (1976-09-01), Perkins
Acurex Corporation
Rolla Joseph J.
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