DRYING SECTION IN A PAPER OR BOARD MACHINE AND METHOD FOR GUIDING A WEB THEREIN

摘要

In the drying section of a paper or board machine, a web (W) travels in a meander-like fashion around drying cylinders (2) and it is provided with ducts for delivering web-run stabilizing suction (S) into the drying section. One or a plurality of cylinders (2b) are provided with ducts (6) for delivering suction (S) in the interior of a drying cylinder, the jacket of said cylinder being provided with flow paths communicating with said duct (6) for delivering suction (S) outside the cylinder both in a sector in which web (W) runs around the jacket of cylinder (2b) and in a sector in which the jacket of cylinder (2b) is unoccupied by the run of web (W).