Metso Paper Inc.

Kari J Salminen

Sakari Soini

Pasi Virtanen

Kari R&auml;is&auml;nen

Kimmo Penttil&auml;

The invention concerns an equipment and a method in a twin-wire former, in which a partly pre-drained or non-drained fiber stock is passed to between the forming wires of the web former in the vicinity of the former roll ( ) or of a water drain box, in which connection water is drained out of the stock web by means of the former roll ( ) or the water drain box. The twin-wire former comprises a rib ( ) in connection with the former roll ( ) or the water drain box in the lateral area of the wires (H ), which rib has been fitted to control the running of the second forming wire H ) passed from the gap roll. By means of the rib ( ), in the lateral area of the wire runs, the point at which said forming wire (H ) reaches contact with the first forming wire in connection with the former roll ( ) or the water drain box is shifted further away in the machine direction. The rib ( ) is an oblong structure, which has a maximal height (H ) in the middle area of the rib ( ).

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Ylinen, Finland

Kari J Salminen