Sulzer-escher Wyss Limited

Voith Sulzer Papiermaschinen Gmbh

Escher Wyss Limited

Robert Trondle

Alfred Bubik

Herbert Holik

Wolf-Gunter Stotz

Rudiger Kurtz

Hans K Dahl

Elmer Weisshuhn

Werner Seider

Anton Zembrot

Klaus Lehleiter

Harald Hess

Christoph Link

Peter Mirsberger

Thomas Merath

Andreas Steidele

Peter Drtina

Michael Kochendorfer

Martin Tietz

Breast box for a papermaking machine. The breast box includes devices in order to add, across the width thereof, localized and dosed material dilution liquids, and located within the breast box is a guiding device having a plurality of channels located immediately downstream of the supply and distribution apparatus, with the guiding device including a multiplicity of inserts in which the channels are located and on whose outer surfaces hollow chambers are formed, wherein the hollow chambers can be filled with the material dilution liquid, the latter then flowing from these hollow chambers into open recesses in the distribution device, with the recesses being directed upstream to the suspension stream existing in the distribution apparatus during the operation thereof.

Breast box for a papermaking machine

Process for modifying an existing breast box for a paper or cartonmaking machine as well as an intermediate portion for carrying out the process. During the fabrication of a breast box for a paper or cartonmaking machine an intermediate portion is interposed between a supply apparatus and a downstream guiding device, with the material suspension flowing through this intermediate portion wherein, via supply lines, located on the intermediate portion, a liquid is added which differs from that of the suspension stream. Particularly, in this manner, already existing breast boxes can be converted, to water dilution technology, with this invention setting forth special embodiments of differing intermediate portions that can be utilized therefor.

Process for modifying a breast box for a paper or cartonmaking 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 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 distribution pipe and pulp guide of the head box are mounted in a box-shaped support which is rotatable within two annular bearings. The support may be rotated so as to move the pulp guide from a horizontal plane into a vertical plane, for example for cleaning purposes. In addition, the distribution pipe is removably secured to the frame so as to be moved out of the support for cleaning purposes.

Removable head box for a paper making machine

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Ravensburg, Germany

Robert Trondle