Patent ID: 6202323
Filing Date: 2001-03-20
Classification: F26B

Abstract:
An apparatus for treating a thin material webs using a gaseous medium, said apparatus comprising:a plurality of slot nozzles disposed in a drying chamber along a direction of conveyance of said material web through said drying chamber, wherein each said slot nozzle includes a plurality of nozzle openings spaced along said conveyance direction for discharging said gaseous medium toward said material web and a plurality of feed openings for introducing said gaseous medium to be discharged through corresponding said nozzle openings, each said nozzle opening having a predetermined fixed width and extending transversely to said conveyance direction; anda control mechanism for adjusting the flow of said gaseous medium through at least one said feed opening, wherein said control mechanism comprises at least one closing member movable to plural positions, including a position for completely closing said feed opening.