Apparatus with an impermeable transfer belt in a papermaking machine, and associated methods

US8246782B2 · kind B2 · utility

Assignee

• Metso Paper Karlstad AB · SE

Inventors

• Paul Douglas Beuther · Neenah, US
• Frank Stephen Hada · Appleton, US
• Jeffrey Dean Holz · Harrison, US
• Hans Ivarsson · Karlstad, SE
• Ingvar Berndt Erik Klerelid · Karlstad, SE
• Johan Ulf Ragard · Karlstad, SE

Key dates

• Filing date: Nov 4, 2011
• Grant date: Aug 21, 2012
• Expiry date: Nov 4, 2031

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21F11/14
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An apparatus for transferring a wet paper web from a press nip to a drying cylinder of a papermaking machine, and for structuring the web, includes an impermeable transfer belt that passes through the press nip along with the paper web, and a permeable structuring fabric for transfer of the web onto the drying cylinder, the structuring fabric being arranged in a loop within which a suction transfer device is disposed. A web-contacting surface of the belt has a non-uniform distribution of microscopic-scale depressions, and a suction zone of the transfer device includes a transfer point spaced a distance D from the press nip. The belt is arranged to bring the web into contact with the structuring fabric in the suction zone for a length L, such that suction is exerted on the paper web to transfer the paper web from the belt onto the structuring fabric at the transfer point.