Patent ID: 6345453
Filing Date: 2002-02-12
Classification: D21F,F26B

Abstract:
A method of drying a fiber web comprising:passing the web through an apparatus comprising first and second endless bands that are impermeable to air, first turning rolls around which the first band is arranged to turn, and second turning rolls around which the second band is arranged to turn, portions of the first band and the second band being arranged to run in parallel such that said portions define between them a drying zone, the first band being heated and the second band being cooled, and the fiber web and at least two felts or wires, of which at least one is a coarse wire and at least one is a fine wire, being arranged to run between the bands in such a manner that the fiber web is in contact with the first, heated band, the coarse wire is in contact with the second, cooled band, and the fine wire is between the fiber web and the coarse wire, the fine wire having warp threads and weft threads oriented perpendicularly to each other; and cleaning the fine wire with water jets and, after the fine wire is cleaned with the water jets, drying the fine wire by blowing air with an air nozzle through the fine wire with the air nozzle arranged at an oblique angle with respect to the weft threads and the warp threads of the fine wire.