JPS54160243A - Color electrophotography - Google Patents

Abstract

PURPOSE: To enable a full color image free from color mackle to be reproduced by a single exposure, by using a photoreceptor prepared by laminating 2 specified photoconductive insulating layers on both the sides of a transparent conductive support.

CONSTITUTION: The surfaces of first photosensitive layer P1 and second photosensitive layer P2 of a photoreceptor are illuminated uniformly by red and blue lights insensible to surface photoconductive layers 3 and 5 but sensible to inner photoconductive layers 2 and 4 and each charged primarily with corona discharger 6 or 7. Next in the dark, the surface of layer P1 is charged secondarily with corona discharger 8 in a charge amount somewhat smaller than that of the primary charge and the surface of layer P2 with discharger 9 in a charge amount of about half of the primary charge. Then, the side of layer P1 is exposed to the light image of original 10, and a static latent image corresponding to black area 10a and red area 10b of original 10 is formed on the surface of layer P1, and a static latent image corresponding to blue area 10c and green area 10d on the surface of layer P2, and each image is developed with negatively charged black toner 11 or green toner 14, and with positively charged red toner 12 and blue toner 13.

COPYRIGHT: (C)1979,JPO&Japio