Abstract: The invention relates to a method and a device for reducing the rewetting of a web after a press nip. The web to be dried is passed together with a press felt through a press nip formed by a first and a second press roll. The web and the felt are separated from each other after the press nip. For reducing the compressive pressure as quickly as possible after the center line of the nip, a mat made of a water-impermeable and resilient material is arranged to pass through the nip, said mat being in contact with the surface of either press roll and one of the surfaces of the web. After the press nip, the mat is subjected to a tensile stress, preferably by means of a second pair of rolls for preventing the returning of the mat to its original thickness starting immediately after the center line of the press nip.

Abstract: The invention relates to a method and means for removing water from a web in a press of a papermaking machine. The web to be dried is passed between press felts through a press nip formed between press rolls. A resilient mat or the like, which is in contact with one of the press felts, is also passed through the press nip. In order to produce a hydraulic counterpressure at the nip, a wire is passed between the resilient mat and one of the press rolls and water is sprayed on the wire immediately before the press nip for producing a water cushion in the section of the wire lying between the press roll and the resilient mat. The wire is in this case formed so that water cannot move in the longitudinal or vertical direction of the wire.

Abstract: A press felt for conveying a paper web through a press section of a paper machine and comprising a support fabric (1) formed of a yarn structure and a fibre bat layer (2) formed of fibres and needled to the support fabric at least on one side thereof. The support fabric and the fibre bat layer are filled with a filling material (3) from one surface of the felt to the other so that the felt has an air permeability of less than 0.5 m.sup.3 of air/m.sup.2 of felt per minute under an air pressure of 100 Pa. The fibre fineness of the fibre bat is preferably at least 6 den.The felt formed by the fibre bat layer and the support fabric is preferably filled from the surface facing the paper with a rubber or resin emulsion so that the filled felt retains at least 45% of its original thickness under a compressive pressure of 10 MPa, in order to avoid blowing and rewetting at a conveying speed of up to 1000 m/min.

Abstract: A conveyor felt for conveying a paper web through a press section of a paper machine, comprising a support fabric (1) formed by a yarn structure and fibre bat layer (2) needled to the support fabric at least on one side thereof. The felt is, with the exception of the surface portion (4) of the fibre bat layer facing the web, filled with a filling material (3) so that the felt is completely air impermeable and has a chamois-like surface (2a). A barrier layer is formed in the fibre bat layer for preventing the filling material from penetrating into the surface facing the web. The barrier layer is obtained by calendering the surface of the fibre bat layer facing the web so as to make it smooth and compact or by providing in the fibre bat layer a fine-fibered fibre bat layer or a filtering intermediate layer on the side of the surface facing the web. The filling of the felt prevents blowing and rewetting at a conveying speed of up to 1000 m/min although the conveyor felt has a chamois-like surface facing the web.