Method and device for winding of fiber webs, especially of paper and board webs

US9169095B2 · kind B2 · utility

Assignee

• Valmet Technologies, Inc. · FI

Inventors

• Jaakko Haapanen · Järvenpää, FI
• Henry Virta · Kerava, FI
• Heikki Föhr · Ayacucho, PE

Key dates

• Filing date: Apr 15, 2013
• Grant date: Oct 27, 2015
• Expiry date: Oct 22, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2801/84
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method and apparatus for winding fiber webs, particularly paper and board webs, in which partial web rolls (R1, R2) are wound in a winding device having at least two winding stations (21, 22), where partial webs (W1, W2) are guided to rolls (R1, R2) via a nip between a winding roll(s) (12, 41, 42) and the partial web rolls (R1, R2). The partial webs (W1, W2) are guided on the surface of the winding roll(s) (12, 41, 42) before entering the nips creating a wrap angle (A1, A2) on the winding drum(s) (12, 41, 42). The wrap angles (A1, A2) of the partial webs onto the surface of the winding roll (12, 41, 42) is at least 120° and the wrap angle ratio, i.e. the relation of the larger wrap angle to the smaller wrap angle, is at least 1 and at most 1.25.