Classifying – separating – and assorting solids – Sifting – Plane sifters
Patent
1975-03-10
1976-07-27
Halper, Robert
Classifying, separating, and assorting solids
Sifting
Plane sifters
209396, B07B 128
Patent
active
039717151
ABSTRACT:
A device for sieving, sorting, filtering and the like, comprising two frame systems movable relatively to each other, each frame system comprising a number of carriers extending in the sieving direction and moving parallel to one another, said frame systems interengaging in such a way that one carrier of one system is always adjacent within a certain distance to one carrier of the other system. Due to the fact that on each pair of adjacent carriers of the two systems there is attached a pair of flexible material mats, said pair of mats consisting of one perforated and one unperforated mat, and that said carriers are moved successively towards and away from each other by the relative motion of said frame systems, there are formed zones of continously changing width at an alternately deep sag of the bottom mats of said mat pairs and at a simultaneously differently large arching of the top mats of said mat pairs, as well as with the top and bottom mats of said mat pairs extending in a tensioned, momentarily overstretched position parallel to each other, which results in the formation of hose- or channel-shaped sorting decks, said sorting decks exerting, owing to their continuously changing cross-section, a pressure or suction effect on the goods to be sieved, sorted or filtered. In spite of the fact that the carriers perform a swinging motion transversal to their longitudinal stretch, a surprising effect of the device according to the invention lies in the fact that the sieving, sorting or filtering goods fed into the hose- or channel-shaped sorting zones of the inclined mounted device are transported in the direction of the longitudinal stretch.
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