Calender and method for treating material webs in the calender

US6248215A · kind A · utility

Assignee

• Voith Sulzer Finishin GmbH · DE

Inventors

• Dirk Cramer · Duisburg, DE
• Ulrich Wagner · Bernburg, DE

Key dates

• Filing date: Jun 30, 1998
• Grant date: Jun 19, 2001
• Expiry date: Jun 30, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S162/10
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Calender and method for treating a material web. The calender includes a plurality of rolls in which each roll has a rotational axis. The rotational axes of the plurality of rolls are arranged to be substantially located in a press plane, and a plurality of nips are formed between adjacent rolls. A control device is provided to selectively open and close the plurality of nips, and the rolls are arranged so that at least two opened nips are positioned between two closed nips. The method includes forming a closed nip with the top roll, forming a closed nip with the bottom roll, forming at least two open nips between closed nips, and guiding the material web through at least the closed nips.