Method and apparatus for caliper control of a fibrous web

Details Method and apparatus for caliper control of a fibrous web Method and apparatus for caliper control of a fibrous web

D - Textiles, Paper

21

G

D21G 1/00 (2006.01) B65H 18/10 (2006.01) D21F 7/06 (2006.01) D21G 9/00 (2006.01)

Patent

CA 2469476

A method for increasing caliper control of a fibrous web as the web is wound onto a roll is provided. The method includes winding the fibrous web containing cellulosic fiber onto the roll (32) to form a wound product and conveying the web through a nip (24) prior to winding the web onto the roll. The nip (24) is configured to apply a pressure to the web to selectively decrease the caliper of the web as the web is wound onto the roll (32). Also disclosed is a system for controlling the caliper of the fibrous web in which a calender device forms a nip through which the fibrous web is conveyed. The system includes an adjustment device (28), which is configured to adjust the nip (24) of the calender device to increase pressure on the fibrous web as the diameter of the roll increases thus increasing uniformity of the caliper of the fibrous web.

L'invention concerne un procédé destiné à augmenter la régulation du calandrage d'un voile fibreux lorsque ce voile est enroulé sur un rouleau. Ce procédé comprend l'enroulement du voile fibreux contenant une fibre cellulosique sur le rouleau (32) afin de former un produit enroulé et le transport du voile à travers un espacement (24) avant l'enroulement du voile sur le rouleau. L'espacement (24) est conçu de manière à appliquer une pression sur le voile afin de réduire de façon sélective le calandrage du voile lorsque celui-ci est enroulé sur le rouleau (32). L'invention concerne également un système destiné à réguler le calandrage du voile fibreux dans lequel un dispositif de calandre forme un espacement à travers lequel le voile fibreux est transporté. Ce système comprend un dispositif de réglage (28), qui est conçu de manière à régler l'espacement (24) du dispositif de calandre afin d'augmenter la pression sur le voile fibreux à mesure que le diamètre du rouleau augmente, ce qui permet d'augmenter l'uniformité du calandrage du voile fibreux.

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