发明授权
US07166403B2 Toner, developer, image developing apparatus, and image forming apparatus
有权
调色剂,显影剂,图像显影装置和图像形成装置
- 专利标题: Toner, developer, image developing apparatus, and image forming apparatus
- 专利标题(中): 调色剂,显影剂,图像显影装置和图像形成装置
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申请号: US11165361申请日: 2005-06-24
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公开(公告)号: US07166403B2公开(公告)日: 2007-01-23
- 发明人: Tomoyuki Ichikawa , Satoshi Mochizuki , Yasuaki Iwamoto , Hideki Sugiura , Tadao Takikawa , Toshihiko Kinsho , Hidetoshi Noda , Shuhei Yahiro
- 申请人: Tomoyuki Ichikawa , Satoshi Mochizuki , Yasuaki Iwamoto , Hideki Sugiura , Tadao Takikawa , Toshihiko Kinsho , Hidetoshi Noda , Shuhei Yahiro
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Company, Ltd.
- 当前专利权人: Ricoh Company, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权: JP2003-196315 20030714
- 主分类号: G03G9/00
- IPC分类号: G03G9/00
摘要:
A toner capable of making compatible a transferring property, a fixing property and a cleaning property and forming a high-precision image. The toner comprises a binder resin and a colorant and is characterized in that the average circularity of the toner is at least 0.95, a ratio (D/S) between the total projection area (S) and the contact area (D) of the toner is 15% to 40%, and the contact area (D) is a total contact area between the toner and an object surface. The toner has such a shape as to be able to contact a latent image carrier with a proper contact area, has a high transferring rate and can prevent transferring dust.