Abstract: The twin-wire former serves for the production of a web of paper or board. Two wire belts (endless wire loops 11 and 12) form a twin-wire zone with each other. Within the twin-wire zone, the one wire belt (12) travels over rigid ledges (28', 28) which are arranged spaced apart from each other on a water-removal box (18). Within the twin-wire zone, furthermore, the other wire belt (11) travels over several ledges (27) which lie opposite the rigid ledges (28), are supported by means of resilient elements (springs 24, pneumatic pressure cushions, or the like), and can be pressed with a selectable force against the other wire belt. Within one of the wire loops (for instance 11), bridging at least two of the ledges (27) present there, a closed wire support surface (9) is provided. A secondary headbox (10') can be arranged in front of the closed wire support surface (9).

Abstract: An extended nip press for the dewatering of a fiber web has an endless flexible press element, like a press jacket or press belt. A press shoe has a concave slide surface for the flexible press element, and the slide surface is adapted to the curve of a backing roll. The shoe is displaceable toward the backing roll in order to press the pressing element against it. A stationary shoe bed, which is detachably connected to a stationary support, has a depression which is provided with a packing and receives the press shoe to form a pressure chamber so that the shoe bed and the press shoe form a cylinder-piston unit. The press shoe is coupled to the shoe bed by means of at least one connecting element. The connecting element is spring biased with respect to the shoe bed and may itself be flexible or be flexibly moved to permit the radial displacement as well as the tilting of the press shoe relative to the shoe bed.

Abstract: A bearing case for a multiple-row self-aligning antifriction bearing, preferably a self-aligning roller bearing, supports a roll journal and has a circulating oil lubrication system with oil feed line and outlet channel. The discharge point of the feed line is located on the one side of the antifriction bearing while the entrance to the outlet channel is arranged on the other side of the antifriction bearing. Provided between the discharge point of the feed line and the adjacent end wall of the bearing case is a baffle that interacts with a stop ring surrounding the roll journal as a sealing element. The stop ring is movable in radial direction relative to the baffle.