Metso Paper Inc.

Petteri Halme

Jorma Laapotti

Petter Honkalampi

Riku Pihko

Juhani Pajula

Tatu Halonen

An arrangement is disclosed for controlling the web in a press section of a paper of board machine wherein the press section includes a press nip and two fabrics arranged to travel through it. In addition, the press section includes a suction roll with a suction apparatus fitted after the press nip. The suction apparatus includes at least one suction case, which is arranged in a closing throat and/or an opening throat formed by one of the fabrics and the suction roll. The suction case is also arranged before and/or after the suction roll in the edge of the fabric in order to create a suction effect in a narrow edge area of the web.

Arrangement for controlling the web in a press section of a paper or board machine

A web (W) passes through a press section having two separate press nips (N, N). At least the first press nip (N) has two water-receiving press felts (). After the first nip (N), the web (W) is separated from one press felt () and transferred on support of the opposite press felt () through the second press nip (N). One roll of the first nip (N) is a press suction roll () and the web (W) is transferred to follow the press felt () on the side of said press suction roll () by means of an underpressure in a suction zone () of said press suction roll (). The press felt () on the side of the press suction roll () is also passed through the second nip (N) of the press section.

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Jyväskylä, Finland

Petteri Halme