Calender for the treatment of a paper web

Details Calender for the treatment of a paper web Calender for the treatment of a paper web

D - Textiles, Paper

21

G

D21G 1/02 (2006.01) D21G 1/00 (2006.01)

Patent

CA 2169976

A calender having one stack of rollers has a working nip formed between a hard roller and a soft roller. A changeover nip is formed between adjacent soft rollers. The changeover nip is arranged approximately in the center of the roller stack. The cumulative weight of the rollers is such that the sum of the loads per unit of length of the working nips disposed above the changeover nip is at least 80 percent of the sum of the loads per unit of lengthof the working nips disposed below the changeover nip.

Calandre constituée de rouleaux superposés et possédant une pince de travail entre un rouleau dur et un rouleau tendre. Une pince de changement de côté est disposée entre des rouleaux tendres adjacents. Cette dernière pince se situe environ au centre de l'empilement de rouleaux. Le poids cumulatif des rouleaux est tel que la somme des charges par unité de longueur des pinces de travail situées au-dessus de la pince de changement de côté équivaut à au moins 80 p. 100 de la somme des charges par unité de longueur des pinces de travail situées sous la pince de changement de côté.

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