Abstract: Various embodiments of a press section for a paper making machine are disclosed having a first press section with two press nips defined by press rolls pressing against a first central roll followed by a second press section with two press nips defined by press rolls pressing against a second central roll. The first central roll is wrapped by a first felt which carries the web through the first and second press nips. The second central roll is unfelted. At least a single respective felt passes through each of the four press nips, and in some embodiments two felts pass through some of those press nips. At least one of the third and fourth press nips is defined by a long nip shoe press in the respective press roll. An additional press nip may be defined around either of the last press roll of the first press section or the first press section, and that additional press nip is double felted.

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).