Patent ID: 6325894
Filing Date: 2001-12-04
Classification: D21F

Abstract:
A method for drainage of a fibrous material comprising:forming a first nip between a first shoe press roll and a first cylindrical roll;forming a second nip between a second shoe press roll and a second cylindrical roll;forming a third nip between the first cylindrical roll and the second cylindrical roll;placing at least one press felt on each side of a fibrous material web;passing the fibrous material web with the at least one press felt on each side through at least one of the first nip, the second nip, and the third nip, and wherein the fibrous material web is always in contact with at least one of the at least one press felts as it is guided from a first one of the first, second, and third nips to a last one of the first, second, and third nips;separating the at least one press felt on one side of the fibrous material web from the fibrous material web after the fibrous web material passes through the second nip; andconveying away the at least one press felt separated from the one side of the fibrous material web,wherein the drainage capacity and the reliable guidance of the fibrous material web are improved.