Dewatering apparatus for longitudinal wire papermaking machines

US4447295A · kind A · utility

Assignee

• Escher Wyss GmbH · CH

Inventors

• Alfred Bubik · Ravensburg, DE
• Hans Dahl · Ravensburg, DE
• Herbert Holik · Ravensburg, DE
• Rudiger Kurtz · Heidenheim, DE
• Werner Seider · Ravensburg, DE

Key dates

• Filing date: Jun 28, 1982
• Grant date: May 8, 1984
• Expiry date: Jun 28, 2002

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F3/00
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A dewatering apparatus contains a longitudinal wire and an additional wire which is guided, conjointly with the longitudinal wire, along a section of such longitudinal wire over a domed or arched surface. This domed or arched surface is formed, for instance, by the jacket or outer surface of a dewatering cylinder arranged within the wire loop of the longitudinal wire. The longitudinal wire is provided with a headbox and extends forwardly and after the dewatering apparatus essentially in a wire plane, above which upwardly rises the domed surface. Both of the wires are guided out of the wire plane over a dewatering shoe arranged within the wire loop of the additional wire towards the domed surface and from such--if desired over a deflection roll arranged beneath the wire plane--again towards the wire plane, where both wires separate from one another. Due to this arrangement there is realized a guiding of both wires which improves the dewatering action and is extensively independent of the elevational position of the wire plane, and at the same time affords a constructional simplification of the papermaking machine.