发明授权
US5991578A Image forming reverse charge printing method and apparatus using image area centered patches of toner 有权
图像形成反向电荷打印方法和使用图像区域居中的调色剂贴片的装置

  • 专利标题: Image forming reverse charge printing method and apparatus using image area centered patches of toner
  • 专利标题(中): 图像形成反向电荷打印方法和使用图像区域居中的调色剂贴片的装置
  • 申请号: US197793
    申请日: 1998-11-23
  • 公开(公告)号: US5991578A
    公开(公告)日: 1999-11-23
  • 发明人: Chu-Heng LiuWeizhong Zhao
  • 申请人: Chu-Heng LiuWeizhong Zhao
  • 申请人地址: CT Stamford
  • 专利权人: Xerox Corporation
  • 当前专利权人: Xerox Corporation
  • 当前专利权人地址: CT Stamford
  • 主分类号: G03G13/22
  • IPC分类号: G03G13/22 G03G15/02 G03G15/34
Image forming reverse charge printing method and apparatus using image
area centered patches of toner
摘要:
An efficient and high quality image forming method and apparatus wherein only selective scattered portions of an imaging surface are charged with a first charging device, and then coated with a layer of charged toner solids by a toner supply apparatus, thereby forming an "image area patch of toner"; wherein each selected scattered portion is centered relative to, and has an area slightly exceeding an area to be imaged; each such charged and coated portion is then image-wise exposed to form a first latent image; each such coated portion is subsequently recharged by a reverse charge printing (RCP) second charging device in an image-wise manner to create a secondary latent image having toner solids in image areas charged to a first polarity, and toner solids in background areas charged to a second and opposite polarity; and finally the toner solids in the image areas thereof are then transferred onto a copy substrate for fixing as an output document, thus leaving a significantly diminished quantity of non-development toner for subsequent removal from the photoreceptor.
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