Abstract: The invention relates to a drying roll for drying a fibrous material web, in particular a paper, cardboard or tissue web in a machine for producing and/or finishing said fibrous material web. The roll can be heated on the interior by a gaseous heat transfer medium and the internal surface of its jacket is provided with elevated sections that extend at least radially inwards, the height of said elevations being greater than the average radial thickness of the condensate layer that forms on the internal surface of the cylinder jacket during operation. The roll is equipped with elements that drain condensate from the condensate chamber that incorporates the areas lying between the elevations. The condensate chamber or at least one condensate sub-section is in hydraulic contact with at least one front-end region of the cylinder.

Abstract: The invention relates to a device and a method for producing and/or transforming a web of fibrous material, in particular a paper or cardboard web. Said device includes a heatable and rotatable cylinder, in particular a drying cylinder of a drying section, and a cylinder sleeve which can be impinged from the inside by a heating fluid. In order to improve the heating power below the external surface of the cylinder sleeve, at least one channel is provided in order to guide the heating fluid.