Method and device for guiding a web of material

US6704978B1 · kind B1 · utility

Assignee

• Trespaphan GmbH · DE

Inventors

• Dieter Mathieu · Ottweiler, DE
• Wolfgang Rasp · Prien am Chiemsee, DE

Key dates

• Filing date: Apr 23, 2002
• Grant date: Mar 16, 2004
• Expiry date: Sep 17, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2515/31
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a method for guiding a flat web of material (1) in which the web of material (1) runs in an arrangement of rotating rollers at a web speed vF. The web of material is guided in its peripheral region via a spreader roll (2) which produces a tensile stress in the transverse direction, i.e. crosswise relative to the machine direction of the web of material (1), wherein this tension in the transverse direction is controlled by means of closed-loop control of the circumferential speed vR of the spreader roll (2) and/or by open-loop control of the cant angle &agr; and/or of the wrap angle &bgr; between the surface of the spreader roll (3) and the web of material (1) and wherein the circumferential speed vR is greater than the web speed vF.