Metso Paper Inc.

Valmet Oy

Kymmene Oy

Juhani Jokinen

Raimo Virta

Vesa Vuorinen

Pekka Eskelinen

Timo Haverinen

Henrik Pettersson

Raimo Malkki

Martti Salmivaara

Keijo Nissil&auml;

Paavo Jaatinen

Tauno Heikkil&auml;

A reactive silencer intended for industrial supply air or exhaust air channels has a sound attenuator chamber ( ), to which is fitted a partition wall ( ) dividing the sound attenuator chamber into a first and second chamber part ( ). The partition wall ( ) is fitted with two or more channels or pipes ( ) which connect the first chamber part ( ) to the second chamber part ( ). In this way a silencer of small size and simple structure is obtained for attenuating noise, especially that produced by large or several small air channels.

Reactive silencer for industrial air channels and its use

A method of and arrangement for resisting formation of undulations in a fiber/water mixture supplied onto a forming wire at an open planar wire section of a paper-making machine include establishing over the wire an air curtain extending over the full breadth thereof, in the region of which the air mass upon the wire is set in motion. The direction of movement of the air mass is the same as the traveling direction of the wire, and the velocity of the air substantially equals the speed of the wire. The air curtain commences on the planar wire section, in the machine direction, only at a given distance from a lip slice of a headbox of the machine, and the air curtain extends along the traveling direction of the web over the planar wire section over a given distance.

Method for resisting formation of undulations in a fiber/water mixture

Growing community of inventors

Masku, Finland

Juhani Jokinen