Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1984-01-27
1986-09-02
Reese, Randolph A.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
198453, 198493, 209639, 209905, 209906, 271309, B07C 5342
Patent
active
046091084
ABSTRACT:
Method of and apparatus for sorting tobacco into two groups: a group of satisfactory leaves and a group of unsatisfactory leaves. Tobacco leaves, spaced so that they pass one by one along a conveyor, travel through a zone illuminated by pulsed polychromatic light and an optical sensor receiving light reflected from the tobacco leaves. In a manner which is synchronous with the pulsations of light there is measured the quantity of the light reflected by each of the leaves in the green, orange, red, and infrared areas of the spectrum. Sums are formed from the values corresponding to the reflected light in such areas of the spectrum and relations are obtained between sums corresponding to the green and orange as well as to the red and infrared ranges, of time in which the value of the reflected light in the infrared area is greater than a value preliminarily preset by the operator. When in such time a number of measurements greater than the preset value is reached or when the relations of the sums are outside preset limits, a decision is made to eliminate the leaves which give rise to such measurements. The apparatus eliminates all but a single layer of longitudinally spaced tobacco leaves thereon, and removes the leaves from the conveyor and blows them in virtually free travel through the air to a sorter in the form of a pneumatic unit.
REFERENCES:
patent: 3770112 (1976-11-01), Asfour
patent: 3854586 (1974-12-01), Perkins, III
patent: 3939983 (1976-02-01), Asfour
patent: 4308959 (1982-01-01), Hoover et al.
Hristozov Vladislav N.
Marchev Zdravko B.
Markov Spas N.
Ribarov Hristo M.
Valev Atanas A.
Hajec Donald T.
Institute po Technicheska Kibernetika i Robotika
Reese Randolph A.
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