Sulzer-escher Wyss Limited

Escher Wyss Limited

Anton Zembrot

Alfred Bubik

Herbert Holik

Wolf-Gunter Stotz

Rudiger Kurtz

Hans K Dahl

Elmer Weisshuhn

Werner Seider

Robert Trondle

Alan Christin

In a headbox system for a papermaking machine with an adjustable distribution of the fiber stock suspension or pulp over the web width, the flow in the delivery slice is controlled in such a way that, across the web width, also the distribution of the fibers in respect of fiber orientation and quantity has a desired profile. For this purpose, the flow of the fiber stock suspension is controlled such that in the event of a change in the distribution of the fiber stock suspension across the web width, the horizontal component of the flow direction in the delivery slice remains, at all locations, always in the predetermined machine direction and thus transverse flows are avoided and the flow rate in the delivery slice has a predeterminate profile.

Headbox control apparatus for a papermaking machine

Headbox apparatus for a papermaking machine

In a headbox system for a papermaking machine with an adjustable distribution of the fiber stock suspension or pulp over the web width, the flow in the delivery slice is controlled in such a way that, across the web width, also the distribution of the fibers in respect of fiber orientation and quantity has a desired profile. For this purpose, the flow of the fiber stock suspension is controlled such that in the event of a change in the distribution of the fiber stock suspension across the web width, the horizontal component of the flow direction in the delivery slice remains, at all locations, always in the predetermined machine direction and thus transverse flows are avoided and the flow rate in the delivery slice has a predetermined profile.

Method of operating a headbox apparatus for a papermaking machine

The dryer drum is provided with header pipes which are rotatable about their axes so that the scavenging pipes can be serviced from within the shell of the drum. The drain pipes are detachable from the header pipes and the drain line to permit rotation of the header pipes. Radial tie rods and U-shaped brackets support the header pipes on the steam drum within the shell.

Dryer drum for a paper making machine

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Aulendorf, Germany

Anton Zembrot