Classifying – separating – and assorting solids – Sifting – Elements
Patent
1978-11-02
1981-01-27
Halper, Robert
Classifying, separating, and assorting solids
Sifting
Elements
209400, B07B 146
Patent
active
042470072
ABSTRACT:
A net or screen formed of crossing strands of an abrasion-resisting organic element and a sieve constructed with such netting or screening. The strands may be either cored or coreless. Where a core is provided it may consist of some type of metallic wire, inorganic fibre or organic polimerized elongationless strands, either solid or formed of monofilament or twisted strands. The net or screen is formed by arranging one set of strands in a plane parallel to each other and spaced apart by predetermined distances and placing a second set of strands, spaced at the same or other predetermined distances parallel to each other, transverse to and on the first set of strands. The two sets of strands are caused to adhere to predetermined points of contact by heating to a temperature at which the contacting elastomers fuse to each other. Netting or screening so formed may be employed to construct screening, such as may be employed in sieves, particularly for sifting out finer materials from coarser materials. Such sieve construction may be accomplished by inserting the ends of one set of strands of the netting in clamping plates and drawing said plates apart from each other by tightening them against walls spaced from each other.
REFERENCES:
patent: 31981 (1861-04-01), Hunter
patent: 2016972 (1935-10-01), Schieferstein
patent: 2274700 (1942-03-01), Jenks
patent: 2723032 (1955-11-01), Gisler
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