Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1978-05-05
1980-06-17
Rolla, Joseph J.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209582, 209587, 250226, 356407, B07C 5342
Patent
active
042079853
ABSTRACT:
Apparatus for sorting articles is characterized by a circuit arrangement responsive to first and second electrical signals representative of the light reflected from the same portion of the article to be sorted as detected against a first and a second background, the first background having a reflectivity characteristic greater than the reflectivity characteristic of the second background, to generate an electrical signal representation of the portion of the viewing zone occupied by the article. This signal is used to scale both the first and second signals to provide an electrical signal representation of the reflectivity of the article at the first and second color wavelengths. The apparatus is further characterized by an article classifier which classifies the article on the basis of the intensity of light reflected at the first and second color wavelengths, the classifier including a memory element having a plurality of storage locations therein which are utilized to define a profile of acceptable articles and to generate an article-reject signal if the reflected intensities of the first and second colors define a point outside of the profile. An ejector is responsive to an ejector dwell control arrangement which initiates operation thereof to apply an ejecting force toward the same predetermined portion of each article being ejected without regard to the presence of the predetermined physical characteristics on the portion of the article toward which the ejecting force is directed.
REFERENCES:
patent: 3012666 (1961-12-01), Cox
patent: 3242342 (1966-03-01), Gabar
patent: 3305089 (1967-02-01), Fraenkel
patent: 3975261 (1976-08-01), Beck
patent: 4134498 (1979-01-01), Jones et al.
patent: 4143770 (1979-03-01), Grimmell et al.
Braham Richard R. M.
Lockett James F.
Mehrkam Thomas O.
Geosource Inc.
Rolla Joseph J.
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