Suction forming roll n double screen method and machine for the manufacture of a fibrous material web

US6235158A · kind A · utility

Assignee

• Voith Sulzer Papiermaschinen GmbH · DE

Inventors

• Hans Dahl · Ravensburg, DE
• Gerhard Kotitschke · Steinheim, DE
• Volker Schmidt-Rohr · Heidenheim, DE
• Wilfried Kraft
• Hans-Jurgen Wulz · Heidenheim, DE
• Klaus Esslinger · Nattheim, DE
• Wolfgang Mayer · Chieming, DE
• Andreas Meschenmoser · Ravensburg, DE
• Gunther Mohrhardt · Encantado, BR

Key dates

• Filing date: Nov 4, 1998
• Grant date: May 22, 2001
• Expiry date: Nov 4, 2018

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F3/04
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A wet section (10) of a paper or cardboard machine and a process for the manufacture of a fibrous material web are suggested. The wet section (10) exhibits a double-screen segment (US), in which two screens (16, 18) are guided about parallel to one another and into which a fibrous material suspension (27) is introduced. The double-screen segment (US) is looped around a roll (22). The means (30, 32, 38) for the immobilization of the fibrous material suspension in the double-screen segment (US) are provided on the roll (22), for the formation of the fibrous material web. Moreover, the wet section exhibits means (32, 34, 36; 34, 36, 66) for further draining of the fibrous material web. The roll (22) is thereby a combined forming and draining roll (22), which exhibits a forming sector (FS), on which the immobilization means (30, 32, 38) are arranged, as well as a draining sector (ES) located in the direction of the running screen behind the forming sector (FS), on which at least a predominant part of the draining means (32-36; 34, 36, 66) is arranged.