发明授权
US07695878B2 Image forming apparatus, process cartridge and toner for use in the image forming apparatus
有权
用于图像形成装置的图像形成装置，处理盒和调色剂
- 专利标题： Image forming apparatus, process cartridge and toner for use in the image forming apparatus
- 专利标题（中）： 用于图像形成装置的图像形成装置，处理盒和调色剂
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申请号： US11687404申请日： 2007-03-16
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公开(公告)号： US07695878B2公开(公告)日： 2010-04-13
- 发明人: Takuya Seshita , Toyoshi Sawada , Tomomi Suzuki , Tsuneyasu Nagatomo , Satoshi Kojima
- 申请人： Takuya Seshita , Toyoshi Sawada , Tomomi Suzuki , Tsuneyasu Nagatomo , Satoshi Kojima
- 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, L.L.P.
- 优先权： JP2006-074534 20060317
- 主分类号： G03G9/087
- IPC分类号： G03G9/087
摘要：
An image forming apparatus including an image bearer; a charging device charging the image bearer; a light irradiating device irradiating the charged image bearer with light to form an electrostatic image; a developing device developing the electrostatic image with a developer including a toner to form a toner image on the image bearer; a transfer device transferring the toner image; and a cleaning device cleaning the image bearer, wherein the volume average particle diameter of the toner is greater than 5.0 μm and less than 5.5 μm, the content of toner particles having a particle diameter of not greater than 4.0 μm is not higher than 20% by number, the ratio of the first shape factor SF-1 to the second shape factor SF-2 is from 1.00 to 1.15, and the content of toner particles having a SF-2 of not less than 115 is not less than 67.8% by number.