Electrostatic charge elimination for magnetic printing system

Claim 2

Apparatus for the removal of spurious magnetic toner particles electrostatically affixed to a surface on which magnetic images are recorded, said appartus comprising: a housing containing a supply of magnetic toner powder and having an aperture disposed in confronting relation to a recording surface; means for applying said toner powder to said recording surface to cause adherance of toner particles to magnetic recorded areas thereof; and means for maintaining a mass of toner particles in contact with said recording surface and of a density providing an electrical conductivity sufficient to discharge spuriously attracted toner particles adhered to said recording surface by electrostatic attraction.

Claim 3

For use in magnetic printing apparatus having a surface on which magnetic recorded images are formed and an applicator for applying magnetic toner powder to recorded areas of said surface, apparatus for removing spurious toner particles electrostatically affixed to said surface and comprising: means for maintaining a mass of toner powder in physical contact with said surface, said mass providing an electrical conductivity sufficient for discharge of the electrostatic charge of said spuriously attached particles to permit removal of said discharged particles from said recorded surface; and means for moving said recording surface along said mass to cause discharge of electrOstatically attracted particles on said surface and removal of said discharged particles from said surface.

Claim 4

For use in magnetic printing apparatus having a surface on which magnetic recorded images are formed and an applicator for applying magnetic toner powder to recorded areas of said surface, apparatus for removing spurious toner particles electrostatically affixed to said surface and comprising: means for maintaining a mass of toner powder in physical contact with said surface, said mass providing an electrical conductivity sufficient for discharge of the electrostatic charge of said spuriously attached particles to permit removal of said discharged particles from said recorded surface; and means for moving said recording surface along said mass to cause discharge of electrOstatically attracted particles on said surface and removal of said discharged particles from said surface.

Claim 7

Apparatus for applying magnetic toner powder to a recording surface of a magnetic recording medium, comprising: a housing containing a supply of magnetic toner powder and having an aperture disposed in confronting relation to a recording surface; a generally cylindrical brush mounted for rotation in said housing at a position confronting said aperture and operative to collect toner powder in said housing; an element supported in said housing and having an edge portion in engagement with the bristle ends of said brush and operative to cause snapping of said bristles as said brush rotates past said edge portion thereby to propel toner powder through said aperture and onto said recording surface for adherence to magnetic recorded areas thereof; and means for providing a conductive discharge path from said recording surface operative upon movement of said recording surface containing toner particles magnetically adhered to recorded areas thereof and spurious toner particles electrostatically affixed to said surface along said means to cause discharge of said electrostatically attracted toner particles and removal of the discharged particles from said recording surface; said conductive discharge means including means for maintaining a mass of toner powder in contact with said recording surface and of a density providing an electrical conductivity sufficient to discharge spuriously attracted toner particles adhered to said surface by electrostatic attraction.

Claim 8

Apparatus for applying magnetic toner powder to a recording surface of a magnetic recording medium, comprising: a housing containing a supply of magnetic toner powder and having an aperture disposed in confronting relation to a recording surface; a generally cylindrical brush mounted for rotation in said housing at a position confronting said aperture and operative to collect toner powder in said housing; an element supported in said housing and having an edge portion in engagement with the bristle ends of said brush and operative to cause snapping of said bristles as said brush rotates past said edge portion thereby to propel toner powder through said aperture and onto said recording surface for adherence to magnetic recorded areas thereof; and means for providing a conductive discharge path from said recording surface operative upon movement of said recording surface containing toner particles magnetically adhered to recorded areas thereof and spurious toner particles electrostatically affixed to said surface along said means to cause discharge of said electrostatically attracted toner particles and removal of the discharged particles from said recording surface; said conductive discharge means including means for maintaining a mass of toner powder in contact with said recording surface and of a density providing an electrical conductivity sufficient to discharge spuriously attracted toner particles adhered to said surface by electrostatic attraction.

Claim 9

Apparatus for the removal of spurious magnetic toner particles electrostatically affixed to a surface on which magnetic images are recorded, said apparatus comprising: a housing containing a supply of magnetic toner powder and having an aperture disposed in confronting relation to a recording surface; and means for maintaining a mass of toner particles in contact with said recording surface and of a density providing an electrical conductivity sufficient to discharge spuriously attracted toner particles adhered to said recording surface by electrostatic attraction.

Claim 10

Apparatus for the removal of spurious magnetic toner particles electrostatically affixed to a surface on which magnetic images are recorded, said apparatus comprising: a housing containing a supply of magnetic toner powder and having an aperture disposed in confronting relation to a recording surface; and means for maintaining a mass of toner particles in contact with said recording surface and of a density providing an electrical conductivity sufficient to discharge spuriously attracted toner particles adhered to said recording surface by electrostatic attraction.