Multi-layer composite screen

Details Multi-layer composite screen Multi-layer composite screen

B - Operations, Transporting

01

D

B01D 39/10 (2006.01) B01D 29/01 (2006.01) B07B 1/46 (2006.01) E21B 43/08 (2006.01)

Patent

CA 2113223

A multi-layer composite screen having filters of a plurality of layers superposed one upon another is provided. Each filter of the plurality of layers has wires of a substantially triangular or trapezoidal cross section arranged in parallel to one another with a continuous slit of a substantially V-shaped cross section being formed between respective adjacent wires, said slit widening increasingly inwardly from the surface of the screen. The wires of one filter of the respective adjacent filters cross the wires of the other filter and the respective adjacent filters are fixed to each other at crossing points of the wires of the respective filters. In one aspect of the invention, the wires are formed with linear projections extending in the longitudinal direction of the wires which facilitate electrical welding of the filters of the adjacent layers.

Présentation d'un tamis composite multicouche comportant des filtres formés d'une série de couches superposées les unes sur les autres. Chaque filtre de la série de couches possède des fils métalliques profilés, dont la section transversale est essentiellement triangulaire ou trapézoïdale. Ces fils sont placés parallèlement les uns aux autres et sont séparés par une fente continue essentiellement en forme de V qui se trouve entre les fils adjacents correspondants; à partir de la surface du tamis, cette fente s'élargit en allant vers l'intérieur. Les fils d'un filtre des filtres adjacents correspondants croisent les fils de l'autre filtre, et les filtres adjacents correspondants sont fixés les uns aux autres aux points de croisement des fils des filtres correspondants. Dans un aspect de l'invention, les fils comportent des projections linéaires qui s'étendent dans le sens longitudinal, ce qui facilite le soudage électrique des filtres des couches adjacentes.

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