Electrophotographic process

Claim 1

AN ELECTROPHOTOGRAPHIC PROCESS COMPRISING PLACING AN ELECTROSTATIC CHANGE ON THE SURFACE OF AN ELECTROPHOTOGRAPHIC MEMBER COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER HAVING A RESISTIVITY OF AT LEAST ABOUT 1014 OHMS-CM. IN DARKNESS AND CAPABLE OF ACCEPTING AN ELECTROSTATIC POTENTIAL OF AT LEAST 300 VOLTS AND SUBSTANTIALLY RETAINING SAID POTENTIAL FOR AT LEAST 10 MINUTES IN THE ABSENCE OF ILLUMINATION AND CAPABLE OF RAPIDLY DISSIPATING THIS CHARGE BY INCREASED CONDUCTIVITY UPON EXPOSURE TO LIGHT, SAID LAYER BEING A SUBSTANTIALLY VITREOUS UNIFORM MIXTURE OF BETWEEN ABOUT 0.1% TO 10% TELLURIUM AND THE REMAINDER SUBSTANTIALLY VITREOUS SELENIUM OVERLYING AND IN ELECTRICALLY CONDUCTIVE CONTACT WITH A CONDUCTIVE BACKING MEMBER, SELECTIVELY DISSIPATING ELECTROSTATIC CHARGE FROM THE SURFACE OF THE CHARGED PHOTOCONDUCTIVE INSULATING LAYER BY EXPOSING THE CHARGED LAYER TO A LIGHT IMAGE THEREBY CREATING AN ELECTROSTATIC LATENT IMAGE ON THE SURFACE OF THE PHOTOCONDUCTIVE INSULATING LAYER, AND DEVELOPING SAID ELECTROSTATIC LATENT IMAGE WITH ELECTRICALLY CHARGED POWDER PARTICLES.