Radiation sensitive photoconductive member

Claim 1

A PHOTOCONDUCTIVE MEMBER COMPRISING AN ELECTRICALLY CONDUCTIVE BASE LAYER, A SEPARATELY FORMED BARRIER LAYER DIRECTLY OVERLYING A SURFACE OF SAID BASE LAYER, A NON-PARTICULATE PHOTOCONDUCTIVE INSULTING LAYER BETWEEN ABOUT 10 AND 200 MICRONS THICK PERMANENTLY AFFIXED ON SAID BARRIER, LAYER, AND A SEPARATELY FORMED LAYER ABOUT 0.05 TO ABOUT 1 MICRON THICK DISPOSED ON THE OUTER SURFACE OF SAID PHOTOCONDUCTIVE INSULATING LAYER, THE BARRIER LAYER BEING A BODY OF ELECTRICALLY INSULATING MATERIAL LESS THAN ABOUT 2 MICRONS THICK ADAPTED TO SUBSTANTIALLY PREVENT CHARGE DISSIPATION IN THE ABSENCE OF ACTIVATING THE PHOTOCONDUCTIVE INSULATING LAYER AND ADAPTED TO PERMIT SUBSTANTIALLY COMPLETE CHARGE DISSIPATION UNDER THE INFLUENCE OF ACTIVATING THE PHOTOCONDUCTIVE INSULATING LAYER AND THE OUTER LAYER BEING AN ELECTRICALLY INSULATING LAYER INCAPABLE OF SUPPLYING CHARGE CARRIERS BY ABSORPTION OF VISIBLE LIGHT.