Method of separating articles having different specific gravitie

Details Method of separating articles having different specific gravitie Method of separating articles having different specific gravitie

1975-11-21

1976-11-16

Lutter, Frank W.

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Sorting special items or sorting by methods and apparatus...

209 10, 209172, 204 1T, B03B 100

Patent

active

039922880

ABSTRACT:
Articles having a first specific gravity may be separated from articles having a second specific gravity by placing said articles in an environment having a specific gravity between the specific gravities of the articles to be separated and thereafter subjecting the articles to pressure waves preferably of an ultrasonic frequency and having an intensity sufficient to initiate movement of said articles in the environment. The articles with the high specific gravity migrate downwardly while the lower specific gravity articles migrate upwardly to the surface where they may be removed.

REFERENCES:
patent: 2150917 (1939-03-01), Foulke et al.
patent: 2896922 (1959-07-01), Pohlman
patent: 3347370 (1967-10-01), Rampacek et al.
patent: 3379625 (1968-04-01), Csabi
patent: 3384279 (1968-05-01), Grechus
patent: 3543393 (1970-12-01), Cosper et al.
patent: 3710932 (1973-01-01), Bodine

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