Patent ID: 6138380
Filing Date: 2000-10-31
Classification: D21F,F26B

Abstract:
A method for effecting controlled temperature drying of a wet web having a central region and first and second border regions, comprising:(a) conveying the wet web to be dried on a moving support in a first direction generally parallel to the web border regions;(b) blowing drying air against the web from the opposite side thereof as the moving support, so that the drying air picks up moisture and becomes moistened air;(c) discharging the moistened air from the volume adjacent the web;(d) heating at least one of the discharged moistened air and make-up air to raise the ability thereof to retain moisture, and redirecting the heated air for use in (b); andwherein (b) is practiced by blowing drying air within a first temperature range against the central region of the web, and by blowing drying air within a second temperature range, lower than the first temperature range, against the web in the border regions.