Method and apparatus for developing color images using dry toner

Details Method and apparatus for developing color images using dry toner Method and apparatus for developing color images using dry toner

1992-05-22

1994-05-24

Kight, III, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

To produce color reproduction

430 42, 430 48, 430102, 430126, 355245, 355259, 355272, 355274, 355326R, 355327, 118644, 118645, 118651, 118653, G03G 1301

Patent

active

053147740

ABSTRACT:
An electrophotographic method and apparatus for developing and printing color images by the electrostatic projection of dry powder color toners onto a photoconductive member. A plurality of color toner projection units are spaced from the photoconductive member and are AC and DC biased to sequentially project each of the cyan, yellow, magenta, and black color planes onto the photoconductive member. The photoconductive member is directly driven against an intermediate transfer member which sequentially receives and stores each of the color planes to thereby form a composite color image, and each color plane is transferred from the photoconductive member before the next color plane is received thereon. The composite color image is then directly transferred to the print medium, whereby the use of the intermediate transfer member eliminates the problems of counter potentials at the surface of the photoconductive member and enables dot-on-dot (DOD) formatting to be utilized for achieving the maximum resolution and print quality of the printed image.

REFERENCES:
patent: 3904406 (1975-09-01), Takahashi
patent: 4961094 (1990-10-01), Yamaoki et al.
patent: 5012289 (1991-04-01), Aldrich et al.
patent: 5086728 (1992-02-01), Kinoshita
patent: 5111302 (1992-05-01), Chan et al.

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