Reproduction machine including an electrostatic sonic toner rele

Electrophotography – Image formation – Development

Patent

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Details

399261, 399290, G03G 1508

Patent

active

060351705

ABSTRACT:
An electrostatic sonic toner release (electrostatic STORE) development apparatus, and a multicolor image reproduction machine including such a development apparatus are provided for creating toner images with reduced development fields. The electrostatic sonic toner release (electrostatic STORE) development apparatus includes a development housing defining a sump for holding developer material containing the toner particles; developer moving assembly mounted within the sump for transporting developer material within the sump; and a donor assembly mounted partially within the sump for receiving toner particles from the developer moving assembly, and for transporting the toner particles through a development nip of the reproduction machine. The donor assembly includes an acoustically deformable loudspeaker-like assembly having first and second electrode members; a dielectric member separating the first and second electrode members, means for creating air pockets against at least one of the first and second electrode members, and a polarizing voltage coupled to the first and second electrode members for generating electrostatic forces to cause acoustic motions in the acoustically deformable loudspeaker-like assembly, thereby resulting in toner release from the donor assembly, reduced image degrading electrostatic fields, and relatively higher quality image development.

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