Patent ID: 6146690
Filing Date: 2000-11-14
Classification: B05C,D21H,Y10S

Abstract:
An applicator device for the application of a coating medium onto a moving fiber material web, the moving fiber material web having a direction of travel and a coating surface, the coating surface carrying a first air boundary layer, said applicator device comprising:a first applicator unit configured to discharge a veil of coating medium onto the coating surface of the material web at a line of contact, the veil of coating medium carrying a second air boundary layer;at least one suction device having a suction power, said at least one suction device being configured for at least partially removing by suction at least one of said first air boundary layer and said second air boundary layer, said at least one suction device being disposed prior to said line of contact relative to the direction of travel of the material web;a dynamic pressure analyzer configured for measuring a dynamic air pressure at a point prior to said line of contact relative to the direction of travel of the material web, said dynamic pressure analyzer providing a pressure signal indicative of said dynamic air pressure; anda control unit electrically coupled to said dynamic pressure analyzer, said control unit being configured for receiving said pressure signal and controlling said suction power of said at least one suction device dependent at least in part upon said pressure signal.