Development system

An apparatus for developing a latent image recorded on a surface with toner, including:

• means, spaced from the surface, for transporting toner to a development zone adjacent the surface, said transporting means includes a donor roll;
• an electrode member positioned in the development zone between the surface and said transporting means, said electrode member includes a plurality of wires;
• means for electrically biasing said electrode member to detach toner from said transporting means so as to form a cloud of toner in the space between said electrode member and the surface with toner developing the latent image, said electrode member having a constant current flowing therethrough, said biasing means electrically biases said electrode wires relative to said donor roll with a DC electrical potential and AC electrical potential;
• magnetic means for generating a magnetic field interacting with the constant current flowing through said electrode member to substantially dampen vibrations of said electrode member, said magnetic means includes a magnetic member disposed on one side of the surface with said electrode wires being located on the opposed side of the surface.

An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with non-magnetic toner to form a visible image thereof, wherein the improvement includes:

• means, spaced from the photoconductive member, for transporting non-magnetic toner to a development zone adjacent the photoconductive member, said transporting means being substantially non-magnetic;
• an electrode member positioned in the development zone between the photoconductive member and said transporting means;
• means for electrically biasing said electrode member to detach toner from said transporting means so as to form a cloud of toner in the space between said electrode member and the photoconductive member with the toner developing the latent image recorded on the photoconductive member, said electrode member having a substantially constant current flowing therethrough;
• and
• magnetic means for generating a magnetic field interacting with the constant current flowing through said electrode member to substantially dampen vibrations of said electrode member, said magnetic means being disposed on one side of the photoconductive member with said electrode member being located on the opposed side of the photoconductive member.

An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with toner to form a visible image thereof, wherein the improvement includes:

• means, spaced from the photoconductive member, for transporting toner to a development zone adjacent the photoconductive member, said transporting means includes a donor roll;
• an electrode member positioned in the development zone between the photoconductive member and said transporting means, said electrode member includes a plurality of wires;
• means for electrically biasing said electrode member to detach toner from said transporting means so as to form a cloud of toner in the space between said electrode member and the photoconductive member with the toner developing the latent image recorded on the photoconductive member, said electrode member having a constant current flowing therethrough, said electrical biasing means electrically biases said electrode wires relative to said donor roll with a DC potential and an AC potential;
• magnetic means for generating a magnetic field interacting with the constant current flowing through said electrode member to substantially dampen vibrations of said electrode member, said magnetic means includes a magnetic member disposed on one side of the photoconductive member with said electrode wires being located on the opposed side of the photoconductive member.