Improved sifting screen

B - Operations – Transporting – 07 – B

Patent

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Details

B07B 1/46 (2006.01)

Patent

CA 2728543

The invention relates to a screen frame adapted for use in a shaker and to which woven wire mesh is to be attached, comprising an outer perimeter and a plurality of plastics ribs extending between opposing regions of the perimeter, the frame being arranged such that, when fitted in a shaker to which it is adapted for, a portion of the opposing regions is clamped in place and a portion of the opposing regions is not clamped with the number of plastics ribs per unit length for the clamped portion greater than the number of plastics ribs per unit length for the unclamped portion, and to a shaker comprising at least one such screen frame.

Linvention concerne un cadre de tamis qui est conçu pour être utilisé dans un agitateur, auquel un grillage métallique tissé doit être fixé, et qui présente un périmètre extérieur et une pluralité de nervures en plastique sétendant entre des zones opposées du périmètre, le cadre étant disposé de sorte que, lorsquil est installé dans un agitateur auquel il est adapté, une partie des zones opposées est fixée en place et une partie des zones opposées nest pas fixée, le nombre de nervures en plastique par longueur unitaire pour la partie fixée étant supérieur au nombre de nervures en plastique par longueur unitaire pour la partie non fixée, et un agitateur comprenant au moins un tel cadre de tamis.

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