METHOD AND APPARATUS FOR CHANGING THE TEMPERATURE OF A MOVING CONTINUOUS WEB

摘要

A method and apparatus for changing the temperature of a moving continuous web (12). The apparatus includes a chamber (26) within which are mounted spaced parallel rollers (10) for contacting one side of the web and a housing (18) interposed between adjacent rollers and having an upper perforated surface (22) which is in close proximity to and along the entire width of the side of the web contacting the rollers. A suction device (30) in fluid communication with the chamber (26) establishes a pressure differential on opposite sides of the web (12) to deflect the web section extending between adjacent rollers (10) to provide a predetermined angle of contact of the web with the rollers. Said suction device (30) is in fluid communication with the elongated housing (18) and causes fluid to be withdrawn from the housing. The fluid has a temperature different from that of the web and flows substantially longitudinally of the web and in proximity to the entire width of the web section which extends between the rollers.