Patent ID: 6012234
Filing Date: 2000-01-11
Classification: D21F,F26B

Abstract:
A machine for drying a continuous web, comprising:at least one drying cylinder around which the web is dried;said cylinder including a sleeve adapted to transfer heat from steam in said cylinder to an outer surface which contacts said web;said sleeve including, on an inner periphery thereof, a plurality of circumferential grooves separated from each other by a plurality of ribs, each said circumferential groove circumferentially extending about said inner periphery of said sleeve;at least one circumferential groove of said plurality of circumferential grooves having a width at its radial outer end which is wider than a width at its mouth at a radial inner end; andat least one rib of said plurality of ribs having a width at its radial outer end which is smaller than a width at its radial inner end.