Patent ID: 6095039
Filing Date: 2000-08-01
Classification: D21G

Abstract:
Calender (12) for treating a product web (28), comprising a plurality of rolls (14 to 26, 30), of which in each case a hard roll and a resilient roll define a nip, which rolls are fitted in uprights of a frame (10) with their axes vertically displaceable, and the bottom roll and the top roll being deflection controlled rolls (16/26, 18/30), characterized in that the rolls of a pair of rolls which form at least one nip are in each case assigned their own drive (50, 52, 54, 56, 58, 60), which is controlled in such a way that forces acting on the rolls in the horizontal direction are kept to a minimum and in that the drives of the individual rolls are supplied in a controlled manner with the power that is needed for the losses of the relevant roll and with at least approximately half the power for re-forming the product web and for transporting the product web.