Distorted rectangular filter cloth screen for vibrating screenin

Liquid purification or separation – Filter – Movable medium

Patent

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Details

210389, 210489, 210490, 210492, 210499, 209401, 209403, B01D 3300, B01D 3908, B01D 3910, B07B 146

Patent

active

058142185

ABSTRACT:
A screen for use with a vibrating screening machine to filter undesired particles from a liquid uses a filter cloth having a substantially rectangular mesh suitable for separating the undesired particles from the liquid bonded in laminar relationship to a back-up having a substantially coarser mesh. The substantially rectangular mesh is formed by a lengthwise array of parallel individual wires woven with a transverse widthwise array of parallel groups of at least three wires. The individual wires are distorted from rectangular proximate the ends of the rectangles by bows in the individual wires at their area of intersection with each of the parallel groups of wires. This configuration provides improved throughput and life characteristics over known screens. A plastic grid of mesh substantially greater than the back-up mesh may be fused to the bonded lamination of the filter cloth and the back-up. The fused grid, cloth and back-up may be corrugated in approximately triangular or sinusoidal fashion with the apexes and nadirs of corrugation being parallel to the groups of wires. The possibility of fracture and tearing at the apexes and nadirs of corrugation and the midpoint bubbling is reduced due to the distorted rectangular configuration. The screen in any of its embodiments can also be secured to a perforated plate or to a plurality of metal strips if additional strength is desired.

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