发明授权
- 专利标题： Charging device, and process cartridge and image forming apparatus using the charging device
- 专利标题（中）： 充电装置，以及使用充电装置的处理盒和成像装置
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申请号： US10775212申请日： 2004-02-11
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公开(公告)号： US07139504B2公开(公告)日： 2006-11-21
- 发明人: Masato Yanagida , Hiroyuki Nagashima , Naohiro Kumagai , Toshio Koike , Atsushi Sampe , Masanori Kawasumi , Eisaku Murakami , Takeshi Uchitani , Tokuya Ohjimi , Masami Tomita , Takeshi Shintani
- 申请人： Masato Yanagida , Hiroyuki Nagashima , Naohiro Kumagai , Toshio Koike , Atsushi Sampe , Masanori Kawasumi , Eisaku Murakami , Takeshi Uchitani , Tokuya Ohjimi , Masami Tomita , Takeshi Shintani
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company Limited
- 当前专利权人： Ricoh Company Limited
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权： JP2003-055090 20030303
- 主分类号： G03G15/02
- IPC分类号： G03G15/02
摘要：
A charging device including: a charging roller having a metal cylinder and an elastic layer located on the metal cylinder; a cleaner configured to clean the charging roller, which includes an electroconductive brush roller including a roller having a shaft; and hair located overlying the roller, wherein the hair includes a fiber which has a width of from 0.1 to 20 denier, and a length of from 0.3 to 2.5 mm and which is planted at a density of from 7,000 to 46,000 lines/cm2, and a member configured to impart substantially the same potential as that of the charging roller to the electroconductive brush roller when a bias voltage is applied to the charging roller. A process cartridge and an image forming apparatus including the charging device are also provided.
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