Twin wire former and method of manufacturing a fibrous material web from a fibrous suspension using same

US6267846A · kind A · utility

Assignee

• Voith Sulzer Papiertechnik Patent GmbH · DE

Inventors

• Gunter Halmschlager · Bezirk Krems an der Donau (Stadt), AT
• Volker Schmidt-Rohr · Heidenheim, DE
• Helmut Tausel · Middletown, US
• Franz Stelzhammer · Böheimkirchen, AT
• Erich Brunnauer · Eisenlohrsweg, AT
• Alexander Wassermann · Wien, AT
• Gunther Prinz · Bischofshofen, AT
• James Ronning · Tacoma, US

Key dates

• Filing date: Jan 27, 1999
• Grant date: Jul 31, 2001
• Expiry date: Jan 27, 2019

Classification

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

Abstract

Twin wire former and method for manufacturing a fibrous material web from a fibrous suspension using same. The twin wire former comprises a movable bottom wire belt and a movable top wire belt converging at a twin wire zone. The twin wire zone has a first section, a second section and an end section. A rotating forming roller is disposed at the first section of the twin wire zone, and the to wire and the bottom wire form a wedge-shaped inlet gap at the first section of the twin wire zone. The inlet gap is adapted to receive the fibrous suspension from a headbox. The bottom wire belt and the top wire belt are adapted to form the fibrous web therebetween at the second section of the twin wire zone, and the second section of the twin wire zone has at least one drainage element. A separating device is disposed at the end of the twin wire zone and is adapted to separate one wire belt from another the wire belt. The twin wire zone has a section disposed in a steep downward direction downstream of the forming roller in relation to the movement of the wires. Also disclosed is a method for manufacturing a fibrous material web from a fibrous suspension using a twin wire former.