Patent Document ID: 4510223
Application ID: 06498825
Patent Status: 1

Claim One:
1. A process of electrophotographic multiple color imaging comprising forming superimposed plural toner images one at a time in sequential order in registry on the photoconductive surface of a uniform microcrystalline wholly inorganic photoconductive coating of an electrophotographic medium to form a composite of superimposed toner images and transferring said of toner images to an image receptor medium to form a superimposed color composite image pattern in registry, the individual toner images being formed successively one at a time from electrically deadenable liquid toner, the images being superimposed on said electrophotographic medium, electrically deadening each color toner image by drying same after formation and before formation of a successive image, exposing each of the dried color toner images and the nonimaged areas of the photoconductive surface to corona originated charged ions subsequent to drying said prior deposited toner image permitting said ions to pass through said electrically deadened dried color toner image or images to thereby apply a uniform overall charge to the photoconductive coating juxtaposed both the dried color toner image-containing areas and the nonimaged areas of the surface of the photoconductive coating, exposing the said charged surfaces to a second color pattern from a source thereof to form a latent charge image of the second color image pattern superimposed on the electrically deadened first toner image, applying a second color electrically deadenable liquid toner corresponding to the second color pattern to the second latent charge image to form a second color toner image superimposed on the first color toner image and repeating the steps of drying, charging, exposing, toning and drying until the desired color composite toner image is formed and transferring the thus produced composite of superimposed toner images to a receptor medium in a single transfer step.