Classifying – separating – and assorting solids – Sifting – Elements
Patent
1997-06-17
1999-12-28
Bollinger, David H.
Classifying, separating, and assorting solids
Sifting
Elements
209399, 209405, 209412, B07B 149
Patent
active
060069236
ABSTRACT:
This improved screening apparatus for sorting various size aggregates utilizes a screen made of polyurethane having two sets of perpendicular evenly spaced parallel webs each of which enclose a wire provided for reinforcement. If desired, the reinforcing wires can be single or multiple through either one or through both sets of webs. Web segments extend between web intersections. Areas enclosed by opposed adjacent web segments provide for the screen openings. This area can contain either a single hole or a plurality of holes to provide a number of different screen sizes. The holes increase in cross-section from the screen aggregate input side to the output side to eliminate or greatly minimize particles wedging within the holes. Backing bucker bars of various widths attached to the lower side of the screen provide a predetermined screen cross-section when their lower edges are supported horizontally. Hooks attached to opposite sides of the screen by bolts, arranged to engage mating mounting brackets, permit applying varying tension to the screen by tightening nuts which secure the bolts.
REFERENCES:
patent: 5104521 (1992-04-01), Rutherford
patent: 5248043 (1993-09-01), Dorn
Helmy Nashat N.
Young Lonn M.
Bollinger David H.
Tandem Products, Inc.
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