Electrophotographic reproduction process using a dual layered photoreceptor

Abstract

Abstract PROCESS OF ELECTROPHOTOGRAPHY USING A PHOTOSENSITIVE MEMBER HAVING TWO PHOTOCONDUCTIVE LAYERS, AT LEAST A PORTION OF THE RANGE OF THE SPECTRAL SENSITIVITY OF THE ONE PHOTOCONDUCTIVE LAYER BEING DIFFERENT FROM AT LEAST A PORTION OF THE RANGE OF THE SPECTRAL SENSITIVITY OF THE OTHER PHOTOCONDUCTIVE LAYER COMPRISING THE STEPS OF APPLYING ELECTROSTATIC CHARGES HAVING OPPOSITE POLARITIES IN ANY DESIRED PATTERN TO A SURFACE OF ONE OF THE TWO PHOTOCONDUCTIVE LAYERS AND TO THE BOUNDARY BETWEEN THE ABOVE DESCRIBED TWO PHOTOCONDUCTIVE LAYERS OR A REGION ADJACENT THERETO, REAPECTIVELY, THEREBY FORMING AN ELECTROSTATIC FIELD IN THE ABOVE-MENTIONED ONE PHOTOCONDUCTIVE LAYER, APPLYING MOBILE ELECTRIC CHARGES TO THE ABOVE-MENTIONED ONE PHOTOCONDUCTIVE LAYER WHILE IT IS EXPOSED TO A LIGHT BEARING THEREIN AN IMAGE TO BE RECORDED, THE LIGHT BEING OF SUCH CHARACTERISTICS THAT THE ABOVE-MENTIONED ONE PHOTOCONDUCTIVE LAYER IS NOT RENDERED SUBSTANTIALLY PHOTOCONDUCTIVE WHILE THE OTHER PHOTOCONDUCTIVE LAYER IS RENDERED TO PHOTOCONDUCTIVE, THEREBY DISCHARGING THE ELECTROSTATIC CHARGES IN BOTH FACES OF THE ABOVE-MENTIONED ONE PHOTOCONDUCTIVE LAYER ACCORDING TO THE PHOTOCONDUCTIVITY OF THE OTHER PHOTOCONDUCTIVE LAYER SUBSTANTIALLY THROUGH THE OTHER PHOTOCONDUCTIVE LAYER AND THE MOBILE ELECTRIC CHARGES BY VIRTUE OF THE ELECTROSTATIC FIELD IN THE ABOVE DESCRIBED ONE PHOTOCONDUCTIVE LAYER AND AN EXTERNAL VOLTAGE SO AS TO FORM AN ELECTROSTATIC LATENT IMAGE IN THE ABOVE DESCRIBED ONE PHOTOCONDUCTIVE LAYER, AND EXPOSING THE ABOVE-MENTIONED ONE PHOTOCONDUCTIVE LAYER TO A LIGHT CONSISTING OF SPECTRAL COMPONENTS WHICH RENDER THE ABOVEDESCRIBED ONE PHOTOCONDUCTIVE LAYER TO BE PHOTOCONDUCTIVE SO THAT THE LATENT IMAGE IS ERASED AFTER IT HAS BEEN UTILIZED.

Inventors

• 👤 Katsuo Makino
• 👤 Yoshihiko Yamada
• 👤 Jun Onozaki

Bibliographic Details