METHOD AND ARRANGEMENT FOR A PAPER MACHINE CLOSE TO A MOVING WEB TO BE DRIED AND USUALLY SUPPORTED AGAINST A WIRE, SEALING DEVICE AND PAPER MACHINE

摘要

The invention comprises a method and an arrangement in a paper machine or the like close to a moving web (29) usually supported against a wire (1), and a paper machine including such an arrangement, and a sealing device having several such arrangements (100). According to the invention, a movable sealing (5) is arranged in the drying section of a paper machine, between two regions (3, 4) with different pressures. Certain air amounts (V1, V2) are supplied to and/or discharged from each side of the sealing (5) in order to create certain pressures in said regions. Air can move between said regions only through certain paths. In normal operating situations the seal (5) according to the invention is automatically adjusted to the desired position in relation to the web.