A machine for drying a continuous web is provided. At least one drying cylinder around which the web is dried is provided. The cylinder includes a sleeve which transfers heat from steam in the cylinder to an outer surface which contacts the web. The sleeve includes, on an inner periphery thereof, circumferential...http://www.google.es/patents/US6012234?utm_source=gb-gplus-sharePatente US6012234 - Device for drying a continuous web