Process and device for production of a pulp web

US6024836A · kind A · utility

Assignee

• Voith Sulzer Papiermaschinen GmbH · DE

Inventors

• Hans-Peter Sollinger · Heidenheim, DE
• Markus Oechsle · Heubach, DE

Key dates

• Filing date: Dec 20, 1996
• Grant date: Feb 15, 2000
• Expiry date: Dec 20, 2016

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F7/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A process and device for producing a pulp web utilizes several independently driven aggregates (i.e., discrete groups) to attain a median web dry content of, e.g., 60%. The number of driven aggregates may depend upon an initial wet strength of the wet pulp web. The relationship is such that when the initial wet strength is relatively high, the number of drier groups is small and when the initial wet strength is relatively low, the number of drier groups is large. However, each drier group includes only a few drier cylinders. The first drier group may include either one or two cylinders, and each subsequent drier group may include at least one drier cylinder more than the adjacent upstream drier group.