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.
An apparatus for screening including a preselectable, tensionable resilient screen to be used in a vibrating sieve, said screen comprising: a first layer of tensionable transverse strands being laid in a plane, each of said transverse strands comprising of an elongated element having at least its outer surface constituted of an abrasion-resisting organic elastomer, said strands being laid parallel to each other and spaced by a first preselectable interval distance from each other; a second of layer of tensionable longitudinal strands being laid upon said first layer of said transverse strands so as to be in a plane and forming mesh openings, said second layer of strands being constituted of longitudinal strands having at least their outer surfaces covered with a layer of abrasion-resisting organic elastomer, said secod layer being fused to said first layer at crossing points by heating said first and second layers to produce a predetermined amount of melting whereby a resilient screen having mesh openings of a preselectable size is provided; and a plurality of bridging strands extending across all corners of said mesh openings from said first strands to said second strands, said bridging strands comprising a elongated element having at least its outer surface constituted of an abrasion resisting organic elastomer.
Claim 2
Independent Claim
207 words
An apparatus for screening including a preselectable, tensionable resilient screen to be used in a vibrating sieve, said screen comprising: a first layer of tensionable transverse strands being laid in a plane, each of said transverse strands comprising of an elongated element having at least its outer surface constituted of an abrasion-resisting organic elastomer, said strands being laid parallel to each other and spaced by a first preselectable interval distance from each other; a second of layer of tensionable longitudinal strands being laid upon said first layer of said transverse strands so as to be in a plane and forming mesh openings, said second layer of strands being constituted of longitudinal strands having at least their outer surfaces covered with a layer of abrasion-resisting organic elastomer, said secod layer being fused to said first layer at crossing points by heating said first and second layers to produce a predetermined amount of melting whereby a resilient screen having mesh openings of a preselectable size is provided; and a plurality of bridging strands extending across all corners of said mesh openings from said first strands to said second strands, said bridging strands comprising a elongated element having at least its outer surface constituted of an abrasion resisting organic elastomer.