Improved sifting screen

Details Improved sifting screen Improved sifting screen

B - Operations, Transporting

07

B

B07B 1/12 (2006.01)

Patent

CA 2210020

A sifting screen is described comprising a rigid frame, a first woven cloth of hard wearing metal wire, stretched thereacross and secured thereto, and a second woven cloth having a coarser mesh than the first cloth and being woven from an elongate material of greater cross-section than the first, also stretched across the frame, and secured thereto, below the first cloth, to support the latter against sagging. In accordance with the invention, the frame may be formed from heavy guage steel or more preferably glass reinforced gas blown polypropylene reinforced by elongate metal reinforcing elements or rods.

L'invention concerne un tamis constitué d'un cadre rigide, d'un premier tissu tissé dans un fil métallique résistant à l'usure, étiré sur le cadre et fixé sur celui-ci, ainsi qu'un deuxième tissu tissé à mailles plus grosses que le premier, et tissé dans un matériau allongé, de section transversale plus grande que le fil du premier, étiré sur le cadre et fixé à celui-ci, sous le premier tissu de manière à empêcher celui-ci de s'affaisser. Selon l'invention, le cadre peut être en acier de calibre épais ou, de préférence, en polypropylène renforcé de fibre de verre, armé d'éléments allongés ou de tiges de renfort métalliques.

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