Patent ID: 7221898

Claim:
A charged particles cleaning apparatus for cleaning and removing charged particles from a surface, said charged particles cleaning apparatus comprising: (a) a housing; (b) a surface scrubbing member mounted within said housing for contacting said surface and removing charged particles therefrom; (c) an air blower for pulling an air stream out of said housing; (d) a manifold connecting said housing to said air blower for directing said air stream and charged particles therein out of said housing, said manifold including manifold walls having inside surfaces defining a duct passage for said air stream (e) at least one biasing source connected to said inside surfaces of said manifold walls for biasing said inside surfaces to prevent build up of charged particles on said inside surfaces, thereby reducing costs of periodic cleaning of said manifold walls; and (f) a pre-clean charging device for charging particles on said surface to a predetermined polarity, said pre-clean charging device and said at least one biasing source having a same polarity.