Method for separating partial webs in a slitter winder

US9260266B2 · kind B2 · utility

Assignee

• Valmet Technologies, Inc. · FI

Inventors

• Heikki Föhr · Ayacucho, PE
• Tommi Vuoristo · Tuusula, FI

Key dates

• Filing date: Aug 26, 2013
• Grant date: Feb 16, 2016
• Expiry date: Jan 9, 2034

Classification

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

Abstract

Partial webs are separated in a slitter-winder. The partial webs (WP) are separated by spreading in a spreading device having at least a first, bowed spreader roll (14) fitted at one side of the partial webs (WP) and a second, bowed spreader roll (15) fitted at the opposite side of the partial webs. The partial webs (WP) are guided over the bowed spreader rolls (14, 15) so that the wrap angles (B 14, B15) over the spreader rolls (14, 15) are substantially unequal. The partial webs (WP) are guided to the first spreader roll (14) in a lead-in direction (Dinxy) in the XY-direction and the partial webs are guided from the second spreader roll (15) in a lead-out direction (Doutxy) in the XY-direction such that the lead-in direction (Dinxy) and the lead-out direction are substantially divergent.