Patent ID: 6351896
Filing Date: 2002-03-05
Classification: D21F,F26B

Abstract:
An apparatus for drying a fiber web, the apparatus comprising:first and second endless bands that are impermeable to air; first turning rolls around which the first band is arranged to turn; at least one heater for heating the first band; second turning rolls around which the second band is arranged to turn, the first band and the second band being arranged to run part of the way in parallel such that they define a drying zone between them; at least one felt or wire being arranged to run between the bands with the fiber web so that the fiber web is in contact with the first band and the felt or wire is between the fiber web and the second band; and a cooling chamber for supplying a cooling medium to cool the second band, said cooling chamber comprising at least one cooling element having: at least one inlet chamber, at least one outlet chamber, and pressure balancing means for balancing the pressure between one portion of the inlet chamber and another portion of the inlet chamber so that the pressure within the inlet chamber is balanced as the second band is advanced along the inlet chamber.