Magnetic brush device for developing electrostatic charge...

Details Magnetic brush device for developing electrostatic charge... Magnetic brush device for developing electrostatic charge...

G - Physics

03

G

32/12.08

G03G 15/09 (2006.01)

Patent

CA 1132341

TRACT OF THE DISCLOSURE Disclosed is a magnetic brush device for use in a photocopy machine for applying a developer com- prised of a toner and magnetic carrier particles to electrostatic charge images on a photoconductive recording medium on a rotating drum, comprising a magnetic brush roller rotatably mounted axially par- allel and in spaced relationship to the drum; a doctor blade positioned adjacent the magnetic brush roller for metering the quantity of developer carried by the roller, this doctor blade converging to a point substantially adjacent the surface of the magnetic brush roller in the regions near both ends of the roller, to define a transition zone at each end thereof; and two elastic wiper members comprised of non-magnetic material mounted to bear against the drum, one in each of the transition zones, for wiping the magnetic carrier particles from the drum and for limiting the width of the developer applied by the magnetic brush roller to the drum.

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