Patent ID: 6387216
Filing Date: 2002-05-14
Classification: D21F

Abstract:
A method for dewatering a fiber web in a shoeless nip press, the method comprising:providing a rotatable cylindrical roll; providing a counterpart having a recess along a portion of a surface of the counterpart, the recess being defined by edges extending axially along the surface of the counterpart, the edges having a radius r and the counterpart having a radius R; providing an endless press belt arranged around the counterpart, the recess in the counterpart, and a shell of the counterpart so as to form a shoeless nip between the endless press belt and the rotatable cylindrical roll; and supplying pressurized fluid to the counterpart so that a first pressure p1 is exerted on a portion of the endless press belt that is adjacent to the recess and a second pressure p2 acts between a portion of the endless press belt outside the recess and the counterpart; wherein r/R is greater than p2/p1.