发明授权
- 专利标题： Image forming method and apparatus, and developing device and process cartridge therefor
- 专利标题（中）： 图像形成方法和装置，以及显影装置和处理盒
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申请号： US11407368申请日： 2006-04-20
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公开(公告)号： US07738819B2公开(公告)日： 2010-06-15
- 发明人: Takahiro Honda , Hiroyuki Fushimi , Shuuichi Endoh , Masato Iio , Shinya Tanaka
- 申请人： Takahiro Honda , Hiroyuki Fushimi , Shuuichi Endoh , Masato Iio , Shinya Tanaka
- 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： JP2005-131109 20050428; JP2005-131712 20050428; JP2005-133497 20050428
- 主分类号： G03G15/08
- IPC分类号： G03G15/08
摘要：
An image forming apparatus including an image bearing member and a developing device configured to develop an electrostatic image on the image bearing member with a toner to form a toner image thereon and including a developing unit configured to develop the electrostatic image, and a toner cartridge configured to supply the toner to the developing unit through at least one opening, wherein the developing device circulates the toner between the toner cartridge and the developing unit through the at least one opening, and wherein the internal temperature of the hopper is higher than that of the cartridge and the ratio of a charge quantity distribution parameter of the toner under a condition of 45° C. and 54% RH to that under a condition of 25° C. and 54% RH is greater than 0.9 and less than 1.5.