Sieve for fibre suspensions and a method for producing same

Details Sieve for fibre suspensions and a method for producing same Sieve for fibre suspensions and a method for producing same

D - Textiles, Paper

21

D

D21D 5/16 (2006.01) B07B 1/18 (2006.01) B07B 1/46 (2006.01)

Patent

CA 2403127

The invention relates to a rotationally symmetrical sieve for fibre suspensions. The inventive sieve comprises a series of straight profile rods (12) which extend in the direction of the sieve axis and form slit-shaped sieve openings (56) in-between themselves. Said sieve also comprises several ring-shaped profile rod carriers (10) that are situated in planes which extend vertically in relation to the sieve axis (14). Each carrier is provided with a series of cut-outs (34) in the edge region thereof which is adjacent to the sieve inlet side, whereby said cut-outs have an open edge towards the sieve inlet side and serve for inserting the profile rods (12). The shape of said cut-outs matches the shape of the cross-sectional areas of the profile rods, whereby said areas are held in a positive fit in the cut-outs. The aim of the invention is to insert the profile rods into the cut-outs of the profile rod carriers in a more simple manner. Each profile rod (12) has a recess (50) for each profile rod carrier (10). Said recess reduces the width of the cross- sectional area pertaining to the profile rod. The recesses are located outside the profile rod carriers when the sieve is completed.

L'invention concerne un tamis à symétrie de rotation pour des suspensions de fibres, qui comprend une série de barres profilées droites (12) s'étendant dans le sens de l'axe du tamis et formant entre elles des ouvertures de tamis (56) en forme de fentes, ainsi que plusieurs supports de barres profilées annulaires (10) situés dans des plans perpendiculaires à l'axe (14) du tamis. Chaque support de barres profilées comporte, dans sa zone de bord voisine du côté entrée du tamis, une série d'encoches (14) à bord ouvert en direction du côté entrée du tamis pour l'insertion des barres profilées (12), la forme de ces encoches correspondant à celle des zones de section des barres profilées, zones de section maintenues par liaison de forme dans ces encoches. L'invention vise à simplifier l'introduction des barres profilées dans les encoches des supports de barres profilées. A cet effet, chaque barre profilée (12) comporte pour chaque support de barres profilées (10) un évidement (50) diminuant la largeur de cette zone de section de la barre profilée, les évidements étant situés à l'extérieur des supports de barres profilées dans le tamis achevé.

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