发明授权
- 专利标题: Two-color image forming apparatus that prevents fringe development
- 专利标题(中): 防止边缘显影的双色图像形成装置
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申请号: US158516申请日: 1998-09-22
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公开(公告)号: US6061534A公开(公告)日: 2000-05-09
- 发明人: Hisao Okada , Teruaki Mitsuya , Shinichi Akatsu
- 申请人: Hisao Okada , Teruaki Mitsuya , Shinichi Akatsu
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi Koki Co., Ltd.
- 当前专利权人: Hitachi Koki Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX9-261982 19970926
- 主分类号: B41J2/525
- IPC分类号: B41J2/525 ; G03G13/045 ; G03G15/00 ; G03G15/01 ; G03G15/02
摘要:
In a two-color image forming apparatus, correction exposure of creating an area having a potential between an image area potential and a white area potential is made for a decided white area on the periphery of the image area. A potential difference between the image area and white area is reduced to attenuate an edge effect, thereby preventing the fringe development. This is accomplished by varying the light amount for the white areas of the intermediate potential areas as a function of the following: surface potentials measured, change in the developing bias voltage and rotating speed of a developing roll, adjustment of the amount of toners by a toner sensor, changing the resistance of a developer, and/or development of raster image processing.