Patent ID: 6289607
Filing Date: 2001-09-18
Classification: D21F,F26B

Abstract:
A flotation dryer unit for drying a web, the flotation dryer unit comprising:at least two nozzle boxes extending across the web and arranged one beside another along a travelling direction of the web for feeding drying gas toward the web to be dried, the nozzle boxes comprising:air distribution channels extending across the web, the air distribution channels having a supply end on a first side and a tail end on a second side of the web, anda nozzle element joined to each of the air distribution channels for feeding drying gas from the air distribution channels toward the web;a distribution chamber for drying gas joined to the supply ends of the air distribution channels, for directing drying gas to the nozzle boxes; anda suction chamber for gathering drying gas fed toward the web and for discharging the drying gas from the web area,wherein the nozzle boxes are covered with a box structure opening toward the web and forming the suction chamber, and wherein the suction chamber is divided by a perforated plate disposed at a distance above the nozzle boxes, into (1) an equalizing space formed between the perforated plate and the web and surrounding the air distribution channels, and (2) a transport chamber formed between the perforated plate and a back side surface of the suction chamber.