Woven wire screening and a method of forming the same

Abstract

A woven wire screening for use in classifying material flowing therethrough and a method of forming the same. The woven wire screening includes a plurality of warp wires and a plurality of weft wires. The plurality of warp wires and the plurality of weft wires are interwoven to form an integral wire cloth having a plurality of openings for permitting material to be classified to flow through the openings. The plurality of warp wires are crimped to form upper and lower knuckles. The plurality of weft wires are crimped to form upper and lower knuckles. Preferably, the plurality of weft wires are crimped deeper than the plurality of warp wires such that the upper knuckles of the weft wires are higher than the upper knuckles of the warp wires creating a knuckle height differential between the upper knuckles of the weft wires and the upper knuckles of the warp wires. The woven wire cloth is formed such that a ratio of the knuckle height differential and size of at least one of the plurality of openings ranges from 5% to 35%. Preferably, the plurality of weft wires have a cross-sectional height at least four wires sizes greater than its cross-sectional width. Similarly, it is preferred that the plurality of warp wires have a cross-sectional height at least four wires sizes greater than its cross-sectional width. The warp and weft wires may each be provided with a pair of substantially flat sidewalls.