Wire section, belt guidance device, and process for forming fibrous material web in wire section

US6342126B1 · kind B1 · utility

Assignee

• Voith Sulzer Papiertechnik Patent GmbH · DE

Inventors

• Joachim Grabscheid · Gerstetten, DE
• Volker Schmidt-Rohr · Heidenheim, DE
• Dieter Egelhof
• Johann Moser · Heidenheim, DE
• Hans Dahl · Ravensburg, DE
• Roger Wiedenmann · Giengen an der Brenz, DE

Key dates

• Filing date: Jan 20, 2000
• Grant date: Jan 29, 2002
• Expiry date: Jan 20, 2020

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F9/003
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Wire section, guidance device, and process of forming a web in a machine for producing a fibrous material web. The device include two revolving endless wire belts, a twin wire zone formed between the two revolving endless wire belts, and a revolving flexible support belt located in a vicinity of the twin wire zone and positioned to support at least one of the two wire belts in a support region. The flexible support belt is generally guided along an at least essentially circular cylindrical path, and the support region includes a support path having an average curvature radius that is greater than a curvature radius of the essentially circular path. The process includes supporting at least one of the two endless wire belts with the flexible support belt in a support region, rotating the flexible support belt along a generally circular path, and deflecting the support belt from the generally circular path in the support region, whereby the support belt in the support regions travels along a support path. An average radius of curvature of the flexible support belt in the support path is greater than an average radius of curvature of the flexible support belt in the generally circular …