发明授权
US3930850A Process for electrophotographic copying by transfer of electrostatic
images
失效
通过静电图像转印进行电子影像复制的方法
- 专利标题: Process for electrophotographic copying by transfer of electrostatic images
- 专利标题(中): 通过静电图像转印进行电子影像复制的方法
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申请号: US384294申请日: 1973-07-31
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公开(公告)号: US3930850A公开(公告)日: 1976-01-06
- 发明人: Shoji Matsumoto , Hitoshi Nishihama , Tatsuo Aizawa
- 申请人: Shoji Matsumoto , Hitoshi Nishihama , Tatsuo Aizawa
- 申请人地址: JA Osaka
- 专利权人: Mita Industrial Company, Ltd.
- 当前专利权人: Mita Industrial Company, Ltd.
- 当前专利权人地址: JA Osaka
- 优先权: JA47-76575 19720731
- 主分类号: G03G15/05
- IPC分类号: G03G15/05 ; G03G5/00 ; G03G5/02 ; G03G15/01 ; G03G15/18 ; G03G15/22 ; G03G13/18 ; G03G13/01 ; G03G13/22
摘要:
An electrophotographic process comprising forming an electrostatic image on the surface of a sensitive member, transferring the electrostatic image onto the surface of a transfer member, and developing the image so transferred. The process specifically involves using an overcoated sensitive member consisting essentially of an electrically conductive base, a photoconductive layer and a light-transmitting surface insulating layer, subjecting the sensitive member to a primary charging in a specific polarity using a direct current corona discharge, exposing light and dark images on the surface of the sensitive member and simultaneously subjecting it to a secondary charging until the surface of the sensitive member has the same polarity as in the primary charging and its potential becomes substantially equal to the untransferable upper limit potential, exposing the entire surface of the sensitive member to render the potential of the dark image area higher than the untransferable upper limit potential without substantially changing the potential of the light image area, transferring the electrostatic image so formed on the surface of the sensitive member to the surface of a transfer member, and then developing the electrostatic image so transferred thereby to form visible images.