D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 3/02 (2006.01) D21G 1/00 (2006.01)
Patent
CA 2370354
A nip is formed between a backing roll (10) and a loading roll (20). The loading roll (20) is comprised of a stationary support structure (21) and, adapted to run about the same, a flexible mantle (22) supported by its inner surface (22a) on said support structure (21) by means of at least one supporting member (23) serving to press said flexible mantle (22) against said backing roll (10). The loading roll (20) includes further at least one essentially axially aligned row of discrete pressure medium feed points (25, 26), whereby a pressure and/or flow rate controlled flow of pressure medium can be fed through the feed points (25, 26) of said at least one row against said inner surface (22a) of said mantle (22). According to the method, the pressure medium fed through said feed points (26) is used cross-machine direction (CD) profiling of the paper or board web passing through the nip (N).
Selon l'invention, un espacement est formé entre un rouleau de soutien (10) et un rouleau de chargement (20). Le rouleau de chargement (20) est constitué d'une structure de support fixe (21) et d'un manteau souple (22) conçu pour défiler autour de la structure de support en y appliquant son revers (22a) au moyen d'au moins un élément de soutien (23) qui presse ledit manteau souple (22) contre le rouleau de soutien (10). Le rouleau de chargement (20) comprend en outre au moins une rangée sensiblement axiale de points d'alimentation discrets (25, 26) d'un milieu sous pression, grâce à laquelle un flux du milieu sous pression à coefficient de pression et/ou d'écoulement contrôlé peut être alimenté par les points d'alimentation (25, 26) de ladite rangée, contre le revers (22a) du manteau souple (22). Selon le procédé de l'invention, le milieu sous pression alimenté par les points d'alimentation (26) sert au façonnage sens travers (CD) de la bande continue de papier ou de carton passant par l'espacement (N).
Metso Paper Inc.
Sim & Mcburney
LandOfFree
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