Classifying – separating – and assorting solids – Sifting – Plane sifters
Patent
1977-04-26
1978-08-08
Lutter, Frank W.
Classifying, separating, and assorting solids
Sifting
Plane sifters
209246, 209257, 209420, B07B 900
Patent
active
041055446
ABSTRACT:
A gravel processing system, preferably of the portable type, utilizing a plurality of screens and conveyors wherein the particle sizes of the finished product may be accurately regulated, and readily varied. Two screen boxes are mounted upon a frame, each box including a plurality of screens which are charged at their inner ends by a top-loading hopper having several outlets providing a versatility of screen charging. The vibrating screens discharge at their outer ends, and the conveyors located below the screens convey the fines from both screen boxes to a common discharge point. A chute and bypass system at the discharge end of one screen box permits the screen discharge to be selectively conveyed to one of several conveyors or chutes, for re-processing or re-crushing, and the apparatus of the system provides extraordinary versatility and particle size sorting and classification in a relatively concise apparatus.
REFERENCES:
patent: 1282127 (1918-10-01), Richardson
patent: 2297486 (1942-09-01), Linke et al.
patent: 2628718 (1953-02-01), Dockins
patent: 3016203 (1962-01-01), Sears et al.
patent: 3622089 (1971-11-01), Quinn
patent: 3841570 (1974-10-01), Quinn
Hill Ralph J.
Lutter Frank W.
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