Patent ID: 6680086
Filing Date: 2004-01-20
Classification: B82Y,C01F,C01P,D21H,Y10T

Abstract:
An apparatus for treating a paper or board web with a treatment material, comprising:an electrically conducting moving wire web capable of supporting a paper or board web to be treated; a means for feeding particles of a treatment material containing mineral-based components onto said paper or board web supported on said moving wire; at least one first electrode electrically connected to said wire web; at least one second electrode disposed a distance from a surface of said wire web and; a high-voltage power supply to enable the formation of a potential difference between the at least one first electrode and said at least one second electrode so as to establish a corona discharge between said at least one second electrode and said wire web, said corona discharge being capable of causing an ion blast sufficient to transport the particles of said treatment material between said at least one second electrode and said wire web toward said wire web to contact and adhere to said paper or board web.