De-watering apparatus in a two-wire former

US5167770A · kind A · utility

Assignee

• Sulzer-Escher Wyss GmbH · CH

Inventors

• Alfred Bubik · Ravensburg, DE
• Hans Dahl · Ravensburg, DE
• Otto Hildebrand
• Karl-Heinz Muller · Wissen, DE
• Jorg Walter · Taunusstein, DE

Key dates

• Filing date: Apr 22, 1992
• Grant date: Dec 1, 1992
• Expiry date: Apr 22, 2012

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F1/48
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The de-watering apparatus for a two-wire paper machine is constructed in such a manner that following the convergence of both wires, firstly, a uniform pressure at a forming roll is exerted on the suspension layer located between the wires. Subsequently, both wires pass de-watering rails which may be located in the upper and/or the lower wire. In this case, an under-pressure is exerted at least at the rails located in the upper wire. At least one further de-watering member then follows before both wires are separated again. The de-watering apparatus can also be used after a preliminary de-watering section, for example an endless wire, and also in the direct vicinity of a head box.