| 发明名称 | Image forming apparatus | ||
| 摘要 | An image forming apparatus includes: a first image bearing member (drum); a second drum; a transfer belt; a first transfer member provided correspondingly to the first drum via the transfer belt; a second transfer member provided correspondingly to the second drum via the transfer belt; a high-voltage power source; and a controller. After an image is continuously formed on transfer materials by applying, to the first transfer member, a voltage of a predetermined polarity from the power source in a state that the first transfer member contacts the transfer belt and the second transfer member is spaced from the transfer belt, the controller executes an adjusting operation in which a voltage of a polarity opposite to the predetermined polarity is applied from the power source to the first transfer member in a state that the second transfer member is spaced from the transfer belt. | ||
| 申请公布号 | US9158241(B2) | 申请公布日期 | 2015.10.13 |
| 申请号 | US201414303846 | 申请日期 | 2014.06.13 |
| 申请人 | Canon Kabushiki Kaisha | 发明人 | Shimizu Yusuke |
| 分类号 | G03G15/20;G03G15/16;G03G15/01 | 主分类号 | G03G15/20 |
| 代理机构 | Fitzpatrick, Cella, Harper & Scinto | 代理人 | Fitzpatrick, Cella, Harper & Scinto |
| 主权项 | 1. An image forming apparatus comprising: a first image bearing member for bearing a toner image; a second image bearing member for bearing a toner image; a transfer belt having electroconductivity; a first transfer member provided correspondingly to said first image bearing member via said transfer belt; a second transfer member provided correspondingly to said second image bearing member via said transfer belt; a high-voltage power source for applying a voltage to said first and second transfer members; and a controller, wherein after an image is continuously formed on a plurality of transfer materials by applying, to said first transfer member, a voltage of a predetermined polarity from said high-voltage power source in a state in which said first transfer member contacts said transfer belt and in which said second transfer member is spaced from said transfer belt, said controller executes an adjusting operation in which a voltage of a polarity opposite to the predetermined polarity is applied from said high-voltage power source to said first transfer member in a state in which said second transfer member is spaced from said transfer belt. | ||
| 地址 | Tokyo JP | ||