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1. (WO2004035443) WEB TENSION CONTROL

Pub. No.:    WO/2004/035443    International Application No.:    PCT/FI2003/000768
Publication Date: Apr 29, 2004 International Filing Date: Oct 16, 2003
IPC: B65H 23/04
B65H 23/188
Applicants: METSO PAPER, INC.
TYNKKYNEN, Topi
INNALA, Matti
KOJO, Teppo
PITKÄNEN, Tatu
LANNES, Petteri
Inventors: TYNKKYNEN, Topi
INNALA, Matti
KOJO, Teppo
PITKÄNEN, Tatu
LANNES, Petteri
Title: WEB TENSION CONTROL
Abstract:
The invention relates to a method and an apparatus for controlling the tension of a moving web during the manufacture of a web-like material, whereby a moving drawing means (2) is pressed against the web (1) and an electrostatic charge is generated in the web and/or the driving means in order to change the friction between the web and the driving means. In accordance with the invention, the tension of the web (1) is measured and the charge to be generated is adjusted on the basis of the measurement result.