Metso Paper Inc.

Erkki Hietamäki

Timo Pirinen

Risto Haiko

Markku Salo

Arto Puranen

Sampo Vörgren

Kauno Kujala

Mikko Kauppinen

Pekka Petrilä

Jouko Karhunen

Jorma Köliö

Esa Lehtovirta

Reijo Koivuranta

Esa Rajala

A dewatering arrangement in the press section of a web-forming machine having a press suction roll () and a press fabric () arranged to run via the press suction roll (). The dewatering arrangement has a saveall (), which is installed in conjunction with the press suction roll (), and drainage facilities () for removing the collected water from the saveall (). The saveall () has a concave guide surface () which in the cross direction is located on a partial distance of the circumference of the press suction roll () and at a distance from the surface of the press suction roll () in order to accomplish a vacuum effect and to hence remove water from the press suction roll ().

Dewatering arrangement on the press section of a web-forming machine

A method and apparatus for damping vibration in a paper machine. The apparatus having a dynamic damper which includes a weight suspended by a spring. The spring constant of the spring is changed by means of a control device in order to tune the natural frequency of the dynamic damper. The dynamic damper is tuned to a frequency that is substantially equal to a multiple of the rotational frequency of the roll in the paper machine that is being damped.

Method and equipment for attenuation of oscillation in a paper machine or in a paper finishing device

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Laukaa, Finland

Erkki Hietamäki