METHOD FOR CROSS-DIRECTION PROFILING OF A PAPER OR BOARD WEB IN A NIP

摘要

A nip is formedbetween a backing roll (10) and aloading roll (20). The loading roll(20) is comprised of a stationarysupport structure (21) and, adaptedto run about the same, a flexiblemantle (22) supported by its innersurface (22a) on said supportstructure (21) by means of atleast one supporting member (23)serving to press said flexible mantle(22) against said backing roll (10).The loading roll (20) includesfurther at least one essentiallyaxially aligned row of discretepressure medium feed points (25,26), whereby a pressure and/or flowrate controlled flow of pressuremedium can be fed through the feedpoints (25, 26) of said at least onerow against said inner surface (22a)of said mantle (22). According tothe method, the pressure mediumfed through said feed points (26) isused cross-machine direction (CD)profiling of the paper or board webpassing through the nip (N).