Metso Paper Inc.

Valmet Corporation

Aimo Närväinen

Samppa J Salminen

Antti Poikolainen

A web is formed between two wire loops (), in a wire section of a paper or board machine, in connection with which dewatering elements () are placed and in which water is drained from a stock suspension from between the two wires (). In the region of a twin-wire zone, a suction roll () is placed within one wire loop and a suction box () having a curved surface is situated in opposed relationship with the suction roll () on the wire loop. After the suction box (), the web is guided, due to the effect of a vacuum of the suction roll (), forwards on the surface of the wire loop of the suction roll ().

Arrangement for a wire section of a paper or board machine

A set of ribs in a dewatering device in a paper machine for supporting and/or loading at least one wire in the paper machine and/or doctoring water from the inner face(s) of the at least one wire. The set of ribs includes at least two cross-direction ribs placed at a distance from one another in the machine direction and whose height positions are adjustable. The ribs of the set of ribs are interconnected in pairs by intermediate parts, and by crank mechanisms placed at a distance from one another in the cross direction of the at least one wire so that the ribs are loadable independently from one another.

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Palokka, Finland

Aimo Närväinen