Classifying – separating – and assorting solids – Sifting – Plane sifters
Patent
1990-06-29
1991-08-06
Huppert, Michael S.
Classifying, separating, and assorting solids
Sifting
Plane sifters
209325, 209326, 209327, 209329, 209331, 209332, 2093654, 2093665, B07B 136, B07B 142, B07B 149
Patent
active
050375350
ABSTRACT:
In a screening machine comprising two screening frames (13 and 31) each having mutual oppositely located feed and discharge ends on which there is arranged an elastic screening lining (54) and which are caused to oscillate by independent oscillating drives wherein the two screening frames (13 and 31) are associated with each other at different heights in such a way that the lower region of the upper screening frame (31) and the upper region of the lower screening frame (13) lie in a common plane, that the elastic screening lining (54) is secured to the two screening frame (13, 31) in the common plane thereof and that the upper screening frame (31) is independently driven in a circular configuration at the feed end and the lower screening frame (13) is indepndently driven in a circular configuration at the discharge end.
REFERENCES:
patent: 3378142 (1968-04-01), Wehner
patent: 3647068 (1972-03-01), Wehner
patent: 3954604 (1976-05-01), Krause et al.
patent: 3971715 (1976-07-01), Wehner
patent: 4188288 (1980-02-01), Wehner
patent: 4287056 (1981-09-01), Dumbaugh et al.
Huppert Michael S.
Wacyra Edward M.
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