Patent ID: 6471746
Filing Date: 2002-10-29
Classification: B03C,Y10S

Abstract:
A method of removing particulate contaminants from a gaseous carrier fluid, the method comprising the steps of:(a) exposing a particulate contaminated gaseous fluid to a corona discharge to impart an electrostatic charge to the particulate contaminants; (b) moving the gaseous fluid containing the charged particulate contaminants in at least a first direction into a collection stage; and (c) collecting the charged particulate contaminants on a collection surface comprising a collection cell formed of at least one flow channel layer defined by a electret charged non-conductive film layer and a second non-conductive layer, the film layer having a first face and a second face, at least one face of the film forming, at least in part, multiple flow channels which flow channels are oriented at least in part in said at least first direction and wherein a second film layer comprising the flow channel layer second layer, or a further layer, at least in part define fluid pathways through the multiple flow channels of the collector cell which fluid pathways allow fluid to pass unimpeded into and through the pathways.