Patent ID: 7022185
Filing Date: 2006-04-04
Classification: B05B,D21H,Y02P

Abstract:
1. An apparatus for treating a moving web of paper or paperboard with a web treatment substance, comprising: an applicator comprising: a suction chamber communicating with the application chamber through an inlet opening positioned at a lower edge of one of the walls delineating the application chamber; and a suctioning means communicating with the suction chamber and the application chamber and being operable to remove mist and accumulation of the web treatment substance in the application chamber by establishing a flow in the suction chamber and the application chamber by establishing a pressure in the application chamber lower than ambient pressure in space surrounding the apparatus, and the pressure in the suction chamber lower than the pressure in the application chamber, so that a free flow direction of substances is from the space surrounding the apparatus into the application chamber, from the application chamber into the suction chamber, and from the suction chamber into the suctioning means, so that web treatment substance sprayed onto the surface of the web but not adhered to the web and formed condensate within the apparatus is removable by the suctioning means.