Patent ID: 6254728
Filing Date: 2001-07-03
Classification: D21F

Abstract:
A method for manufacturing a fibrous pulp web, comprising:providing a first shoe press and a second shoe press, wherein the second shoe press is arranged behind the first shoe press in a web run direction;forming a press opening which is elongated in the web run direction in the first shoe press, and forming a press opening which is elongated in the web run direction in the second shoe press;guiding the web through the press opening of the first shoe press, and through the press opening of the second shoe press;applying increasing pressure to the web in the press opening of the first shoe press, wherein a maximum pressure in the press opening of the first shoe press is less than or equal to approximately 15 bar;applying increasing pressure to the web in the press opening of the second shoe press, wherein a maximum pressure in the press opening of the second shoe press is approximately three times as large as the maximum pressure in the press opening of the first shoe press, and wherein an initial pressure in the press opening of the second shoe press is less than a final pressure in the press opening of the first shoe press;providing an additional press having a press opening which is elongated in the web run direction;arranging the additional press behind the second shoe press in the web run direction;guiding the web through the press opening of the additional press; andproviding a felt belt on each side of the web in the press opening of the first shoe press, and providing a single felt for each of the press opening of the second shoe press and the additional press, wherein the felts for the press opening of the second shoe press and for the additional press are arranged to contact opposite sides of the web.