Classifying – separating – and assorting solids – Sifting – Elements
Patent
1977-09-14
1980-08-26
Halper, Robert
Classifying, separating, and assorting solids
Sifting
Elements
209408, B07B 146
Patent
active
042194121
ABSTRACT:
Screening apparatus for aggregates or the like has a sieve screen comprising a plurality of sieve elements secured to a support frame of moulded synthetic plastics material, each element having a lug formed by an undercut peripheral depending skirt engaging a corresponding recessed sidewall of a groove in the frame. A support frame for such a sieve screen may be in the form of a lattice moulded from synthetic plastics material, preferably have cross members so spaced that each aperture of lattice will be obscured by a different one of the plurality of sieve elements. The frame may have a plurality of attachment bars projecting at intervals from the undersurface thereof and be supported in the apparatus by a plurality of spaced support bars, each bar having, at intervals along its length corresponding to the spacing of the attachment bars, apertures of a shape to receive said bars.
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Drucker William A.
Halper Robert
N. Greening Limited
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