Abstract: The present invention relates to an arrangement and a method for controlling or regulating shrinkage and/or stretching of a paper web transversely to the transport direction thereof in a drying section of a paper machine, this drying section having the form of a cylinder dryer (6) and/or a fan dryer. At a point in the drying process at which the paper web exhibits a dry solids content of at most 75%, the paper (10) is subjected to an outwardly directed force which is forced to act in the edge portion (10a, 10b) of the web. The forces are caused to act adjacent parallel edge portions (10a, 10b) of the paper web and are directed away from each other. The magnitude of these forces is selected so that they fall beneath shrinkage forces occurring momentary on the paper web at the dry solids content in question by at most 50%.

Abstract: A method and apparatus for drying disintegrated fiber mass or paper pulp comprising substantially free single fibers and wads or lumps of fibers. The disintegrated fiber mass is exposed to hot drying air or gas at a temperature of at least 180.degree. C. Free fibers are separated from the fiber mass during or after the drying process in order to avoid or compensate for excessive heating and drying of these free fibers. This facilitates a later grinding process in which the dried fiber mass is ground after addition of water.