Roll for a paper machine, in particular for a paper drying...

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 5/04 (2006.01) D21F 3/10 (2006.01) F26B 13/14 (2006.01) F26B 13/16 (2006.01)

Patent

CA 2275324

A roll for a paper machine includes an axle on whose support the roll revolves, and a surface construction connected to the axle by support members. The openness of the surface construction of the roll is higher than about 10% so that when the roll revolves an effect is produced that sucks air inward into the roll whereby a flow of air through the roll arises. A single-wire draw dryer group for a paper machine has two contact-drying cylinders and one reversing roll wherein a web to be dried is guided on support of a drying wire meandering from one drying cylinder onto the reversing roll and then onto the other drying cylinder so that on the drying cylinders, the web remains between the cylinder face and the drying wire and on the reversing cylinder, the web is situated at the side of the outside curve. The reversing roll in the dryer group is a roll as described above.

L'invention concerne un cylindre (10) destiné à une machine à papier, qui comprend un axe (11) sur lequel le cylindre (10) est monté rotatif, et une structure de surface (13) qui est reliée à l'axe par des pièces supports (14). L'ouverture de la structure de surface (13) du cylindre (10) est de préférence supérieure à 20 %, de façon que la rotation du cylindre (10) provoque une aspiration de l'air vers l'intérieur et son entrée dans le cylindre (10), ce qui crée un flux d'air traversant ce dernier. L'invention concerne également un groupe sécheur, qui comprend deux cylindres sécheurs à conduction et au moins un cylindre inverseur (10), et dans lequel on utilise une seule toile. Au moins l'un des cylindres inverseurs (10) dudit groupe est un cylindre ouvert (10), dont la structure de surface (13) présente une ouverture, de préférence supérieure à 20 %, de façon que le flux d'air accompagnant la toile traverse la structure de surface ouverte (13), entre dans le cylindre (10) et en ressorte en même temps que la toile, sous la forme d'un flux d'air qui traverse la structure de surface ouverte (13) du cylindre (10).

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