发明授权
- 专利标题： Developing device capable of preventing toner particles from being accumulated at a front end of a cover member
- 专利标题（中）： 显影装置能够防止调色剂颗粒积聚在盖构件的前端
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申请号： US09522000申请日： 2000-03-09
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公开(公告)号： US06256466B1公开(公告)日： 2001-07-03
- 发明人: Katsuya Ota , Masahiko Kobayashi
- 申请人： Katsuya Ota , Masahiko Kobayashi
- 优先权： JP11-070951 19990316
- 主分类号： G03G1506
- IPC分类号： G03G1506
摘要：
A developing device 3 has a cover member 14 for covering an upper part of a developing roller 11. A seal 16 at a front end of the cover member 14 is brought into contact with a peripheral surface of a photosensitive drum 1. When toner particles are accumulated in the vicinity of a front end of the seal 16, the toner particles adhere to the photosensitive drum1, so that an undesirable black strip appears. Therefore, a voltage in a range from a developing bias to a potential at which the photosensitive drum 1 is charged is applied to a cover plate 15 of the cover member 14. The seal 16 is at a high potential which is the same in polarity as the potential at which the photosensitive drum 1 is charged. Accordingly, no toner particles are accumulated at a front end of the seal 16, so that no black stripe appears.
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