Classifying – separating – and assorting solids – Sifting – With weighting
Patent
1992-01-08
1993-06-29
Skaggs, H. Grant
Classifying, separating, and assorting solids
Sifting
With weighting
209260, 209315, 209317, 209390, B07B 1300
Patent
active
052226050
ABSTRACT:
The size ranges of particles separated on a stack of sieves of different mesh sizes is measured automatically. The stack is clamped together and shaken as a unit to separate the respective fractions, following which the sieves are sequentially separated from the stack and inverted one at a time to dump the fraction retained on each, onto a scale. Each fraction is weighed separately and their relative proportions can be calculated automatically. In a preferred embodiment the sieves are individually cantilevered from a vertical conveyor. The sieves are inverted one by one to dump their contents by advancing them around a horizontal roll at a lower end of the conveyor.
REFERENCES:
patent: 2773599 (1956-12-01), Litus et al.
patent: 3098037 (1963-07-01), Tonjes et al.
patent: 3439800 (1969-04-01), Tonjes
patent: 4487323 (1984-12-01), Marrs
patent: 5059310 (1991-10-01), Fisher et al.
Seishin I-Robot Sifter RPS-85-Seishin Enterprise Co., Ltd.
Seishin II-Robot Sifter RPS-85EX-Seishin Enterprise Co., Ltd.
Tyler I-Operation, Maintenance and Parts Manual-Ro-Tap Testing Sieve Shaker-W. S. Tyler, Inc.
Tyler II-Specification Tables For Industrial Wire Cloth and Woven Wire Screens-Cat. No. 74, 1981 Ed., W. S. Tyler, Inc.
Rotex, Inc.
Skaggs H. Grant
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