Metso Paper Inc.

Valmet Technologies, Inc.

Pasi Kekko

Kari Holopainen

Mika Viljanmaa

Markku Lummila

Antti Komulainen

Kari Juppi

Vesa Vuorinen

Reijo Pietikäinen

Matti Kurki

Pekka Pakarinen

Taisto Huhtelin

John K Shakespeare

Jari Ilomäki

Jani Hakola

Asko Majori

Henri Vaittinen

Petri Ristola

Jaana Pienmäki

Jouni Haavisto

Robert Havukainen

Jaakko Seppänen

Hannu-Pekka Hyppänen

A fiber-web machine dryer section has a drying group with single-wire draw so the drying wire (F) presses the web (W) against heated cylinder surfaces with the web (W) at the side of the outside curve of reversing cylinders () situated between drying cylinders (). A pocket space (T) is formed between two adjacent drying cylinders () and a reversing cylinder () situated between them, and the drying wire (F). A negative pressure component () placed in the pocket space (T) creates a pressure difference over the drying wire (F) and the web (W) for attaching the web (W) to the drying wire (F) so the cross-direction shrinkage of the web (W) is controllable. The wire tension (F) is maintained at a level help control cross-direction shrinkage of the web. The pocket space (T) is sealed by sealing members () to maintain negative pressure in the pocket space.

Method and device in a dryer section of a fibre-web machine, such as a paper or board machine

In a paper or board machine drying line after the wire section, during dewatering a web's (W) width is affected in a direction crosswise to the web's traveling direction. Starting from an edge, at least one device (A,B) brings about a force effect of a desired magnitude which is directed all the way to a desired arbitrary crosswise web position in order to modify web characteristics. A device in a paper or board machine line after the wire section has means for processing the web and for dewatering. The paper or board machine line after the wire section further has at least one device (A;B) for directing a force effect at a desired partial area (WS) of the web (W) in the cross machine direction in order to modify the web's characteristics profile in the cross machine direction.

Method and device in a paper or board machine line for straining paper

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Toivakka, Finland

Pasi Kekko