Classifying – separating – and assorting solids – Sifting – Drum sifters
Patent
1995-10-25
1998-03-31
Nguyen, Tuan
Classifying, separating, and assorting solids
Sifting
Drum sifters
209288, 209421, B07B 118
Patent
active
057328277
ABSTRACT:
The invention is a screening apparatus for classifying material of different sizes. A screen is rotatably mounted on a frame for rotation around a first axis which is angled upwardly away from the horizontal, at an angle of from 0 to 30 degrees. The screen is symmetrical about the axis and has an open upper inlet end and a lower outlet end. The screen has a cylindrical portion extending from the inlet end towards the outlet end, having a diameter larger than its length, and a conical portion extending from the cylindrical portion towards the outlet end, tapering inwardly to a central outlet opening, the lowest point of the outlet opening being substantially higher than the lowest point of the screen. The frame is pivotally mounted on a trailer for pivoting about a longitudinal axis near a lower side edge of the trailer. The open inlet end of the screen faces one side of the trailer. A screened discharge conveyor and an oversize conveyor carried the screened and oversized material, respectively, away from the screen.
REFERENCES:
patent: 5002656 (1991-03-01), Johansson
patent: 5301813 (1994-04-01), Schmittjer
patent: 5346071 (1994-09-01), Page et al.
Armstrong R. Craig
Nguyen Tuan
Portec Inc.
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