Papermaker's screen cylinder with helix screen element

Details Papermaker's screen cylinder with helix screen element Papermaker's screen cylinder with helix screen element

B - Operations, Transporting

07

B

B07B 1/49 (2006.01) B01D 29/11 (2006.01) B07B 1/20 (2006.01) B07B 1/46 (2006.01) B23P 15/16 (2006.01) D21D 5/16 (2006.01)

Patent

CA 2356137

A papermaker's screen cylinder (10) has a screen body (11) formed as a helical strip (15) of sheet material being joined along marginal edges to form lock seams (18), and mounted on end rings (12, 13). The strip (15) may be perforated with openings therein such as holes or may have openings or holes formed therein after being helically wound. The strip (15) is preferably corrugated transversely of its width with corrugations (21, 22) that extend parallel to the edges of the strip so as to enhance the beam strength of the strip. The end rings may be formed of stainless steel or may be formed of a polymer or composite material (36) bounded on the ends of the cylindrical screen body and retained by embedded anchors (40) extending through the screen body and into the material of the rings.

L'invention concerne un cylindre classeur (10) de machine à papier, qui comporte un corps (11) de tamis formé d'une bande hélicoïdale (15) de matière en feuille jointe au niveau de ses bords marginaux de façon à former des joints sertis (18), montée sur des anneaux terminaux (12, 13). La bande (15) peut être préalablement perforée d'orifices, telles que des trous, ou peut posséder des orifices ou trous formés après l'enroulement de la bande en hélice. Cette bande (15) est de préférence ondulée dans le sens de la longueur, les ondulations (21, 22) s'étendant parallèlement aux bords de la bande de façon à en augmenter la résistance à la flexion. Les anneaux terminaux peuvent être constitués d'acier inoxydable, d'un polymère ou d'une matière composite (36), sont apposés sur les extrémités du corps du tamis cylindrique et sont retenus par des attaches intégrées (40) traversant le corps du tamis et s'ancrant dans le matériau des anneaux.

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