G - Physics – 03 – G
Patent
G - Physics
03
G
32/12
G03G 13/08 (2006.01) G03G 15/08 (2006.01)
Patent
CA 1066042
ABSTRACT OF THE DISCLOSURE Microfield donors used in a xerographic process in which the donor is provided with means for establishing a plurality of electrostatic microfields on the donor surface to attract and hold toner particles so they can be transported to a developing station. The polarity of the established microfields are continuously reversed to alternately repel and attract toner particles to the donor surface during their transportation in order to agitate the toner particles to prevent agglomeration of the particles from forming and to effect nullification of the microfield attracting the particles adjacent a photoconductor to form a high density image free of background deposits in uncharged area of the photoconductive surface. In one alternative embodiment, the donor is spaced from the photoconductive surface by a spacer element to thereby preclude background deposits of toner from forming in the development of an electrostatic latent image on the photoconductive surface.
241041
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