Machine for producing a material web

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 5/00 (2006.01) D21F 3/10 (2006.01) D21F 5/04 (2006.01)

Patent

CA 2202951

A machine for producing a material web, e.g, a paper or cardboard web, with a dryer section including at least one dryer group having a plurality of dryer cylinders and a plurality of web guide rolls, e.g., suction web guide rolls. At least one web guide roll, and preferably all, may be associated with an external suction box. Further, a jacket of the at least one web guide roll may include a plurality of through openings and at least one groove formed in an outer surface of the jacket. A predetermined number, and preferably all, of the through openings may be coupled with a bottom portion of the at least one groove to enable the external suction box to suction the at least one web guide roll.

Machine pour produire une bande de matériau, p. ex. une bande de papier ou de carton, avec une sécherie comprenant au moins un groupe de sécheurs munis de plusieurs cylindres sécheurs et de plusieurs rouleaux guide-feuille, p. ex. des rouleaux guide-feuille aspirants. Au moins un ou, de préférence, tous les rouleaux guide-feuille peuvent être associés à une caisse aspirante externe. De plus, une chemise d'au moins un rouleau guide-feuille peut inclure de nombreuses ouvertures creuses et au moins une rainure formée dans une surface extérieure de la chemise. Un nombre déterminé ou, de préférence, toutes les ouvertures creuses peuvent être couplées avec le fond d'au moins une rainure pour permettre à la caisse aspirante extérieure d'aspirer au moins un rouleau guide-feuille.

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