发明授权
US6118954A Image forming apparatus having transfer roller with charge-removing and
cleaning devices
失效
图像形成装置具有带有除电和清洁装置的转印辊
- 专利标题: Image forming apparatus having transfer roller with charge-removing and cleaning devices
- 专利标题(中): 图像形成装置具有带有除电和清洁装置的转印辊
-
申请号: US115260申请日: 1998-07-14
-
公开(公告)号: US6118954A公开(公告)日: 2000-09-12
- 发明人: Takuya Abe , Kiyoshi Toizumi , Fumio Shimazu , Hiromu Yoshimoto , Kouichi Yamauchi , Hiroshi Tachiki , Tomohiro Oikawa , Yoshie Iwakura , Atsuyuki Katoh
- 申请人: Takuya Abe , Kiyoshi Toizumi , Fumio Shimazu , Hiromu Yoshimoto , Kouichi Yamauchi , Hiroshi Tachiki , Tomohiro Oikawa , Yoshie Iwakura , Atsuyuki Katoh
- 申请人地址: JPX Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JPX Osaka
- 优先权: JPX6-253878 19941019; JPX7-146510 19950613; JPX7-142277 19950619; JPX7-179108 19950719
- 主分类号: G03G15/16
- IPC分类号: G03G15/16
摘要:
An image forming apparatus includes a transfer drum which attracts and holds a transfer paper electrostatically. A voltage is applied to a conductive layer provided on an inner side of the transfer drum, and a grounded conductive electrode member is pressed against a dielectric layer provided on an outer side of the transfer drum through the transfer paper. A toner image formed on a photosensitive drum is transferred onto the transfer paper when the transfer paper is wound around the transfer drum and brought into contact with the photosensitive drum. The image forming apparatus further includes a member which charges the transfer paper in a polarity reversed to a polarity of the transfer drum, so that the transfer drum can attract the transfer sheet electrostatically in a satisfactory manner. The image forming apparatus further includes a mechanism for removing the charges on the surface of the transfer drum via a bias switching device and a cleaning device for cleaning the surface of the transfer drum so as to eliminate defects in a transferred image, thereby upgrading the quality of a resulting image. The cleaning device may be a blade having a particular engagement crossover between the blade and transfer drum.
公开/授权文献
- USD427929S Electronic article surveillance unit 公开/授权日:2000-07-11