Method for profiling a paper web

A method for profiling a fibrous web in a multiroll calender, the multiroll calendar having an upper set or stack of rolls, having a lowermost roll, and the multiroll calender having a lower set or stack of rolls, having an uppermost roll, and the multiroll calender having a reversing nip which does not profile the web formed between the lowermost roll and the uppermost roll, the method comprising the steps of:

• profiling a first side of the web in the lower set or stack of rolls having at least one first calendering nip which is formed in a cross-direction of the web between two rolls and which profiles the first side of the web in the cross-direction of the web by regulating distribution of load to the first side in the nip in a cross-machine direction;
• profiling a second side of the web in the upper set or stack of rolls having at least one second calendering nip which is formed in the cross-direction of the web between two rolls and which profiles a second side of the web opposite to the first side in the cross-direction by regulating distribution of load to the second side in the nip in the cross-machine direction;
• and
• passing the web through the reversing nip which does not profile the web and, wherein the first side is profiled in the first calendering nip and the second side of the web is profiled in the second calendering nip before passing the web through the reversing nip;
• wherein the first calender nip is a lowermost calendering nip of the lower set or stack of rolls situated beneath the reversing nip of the multiroll calender, and wherein the second calender nip is an uppermost calendering nip of the upper set or stack of rolls situated above the reversing nip of the multiroll calender, and that after the web is profiled in the uppermost nip of the upper set or stack of rolls the web is arranged to run from the uppermost calendering nip downward first through non-web-profiling nips of the upper set or stack of rolls, then through the reversing nip.

A method of calendering a paper web in a calender of the type composed of a stack of at least four calendering rolls each calender roll forming at least one nip with an adjacent calender roll to form the stack, the calender having a first cross machine direction profiling nip between a soft roll and a thermo roll, the calender having a second cross machine direction profiling nip between a second soft roll and a second thermo roll, the calender also having a reversing nip formed between two soft calender rolls positioned in the stack between the first cross machine direction profiling nip and the second cross machine direction profiling nip;

• the method of calendering comprising the steps of:
• profiling a first side of the paper web in the first cross machine direction profiling nip, by regulating distribution of load to the first side in the nip in a cross-machine direction followed by,
• profiling a second side of the paper web in the second cross machine direction profiling nip, by regulating distribution of load to the second side in the nip in the cross-machine direction and
• after the first and second sides of the paper web have been profiled
• passing the web through the reversing nip.