Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1977-08-31
1981-04-07
Spar, Robert J.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209587, 250223R, 356425, B07C 5342, G01J 346
Patent
active
042600626
ABSTRACT:
A sorting apparatus for sorting articles randomly disposed in an article stream includes a viewer for viewing a predetermined area through which the article stream is passed and for generating an electrical characteristic signal functionally related to the presence of a physical characteristic of the article passing within the viewed area. The electrical characteristic signal is compared to a range of signal values representative of a foreign object. The amount of time during which the characteristic signal falls within the range of signal values during a reference time interval is measured and compared with a time reference standard. An article reject signal is generated if the characteristic signal falls within the predetermined range of signal values for an amount of time exceeding the predetermined time reference standard. The reference time interval is measured from the occurrence of an article-detect signal generated by an article-detect signal generator which signal is representative of the presence of an article within the viewed area. The invention may be implemented in digital or analog format and in a multiplexed or non-multiplexed environment.
REFERENCES:
patent: 3257897 (1966-06-01), Schneider
patent: 3729635 (1973-04-01), Shottenfield et al.
patent: 3867039 (1975-02-01), Nelson
patent: 3980181 (1976-09-01), Hoover et al.
patent: 4011457 (1977-03-01), Wolf
Geosource Inc.
Spar Robert J.
Wacyra Edward M.
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