发明授权
- 专利标题： Toner for developing an electrostatic image and a production method thereof, and an image forming method
- 专利标题（中）： 用于显影静电图像的调色剂及其制备方法和图像形成方法
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申请号： US09452075申请日： 1999-11-30
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公开(公告)号： US06248494B1公开(公告)日： 2001-06-19
- 发明人: Hiroshi Yamazaki , Ken Ohmura , Tomomi Oshiba , Meizo Shirose , Shigenori Kouno
- 申请人： Hiroshi Yamazaki , Ken Ohmura , Tomomi Oshiba , Meizo Shirose , Shigenori Kouno
- 优先权： JP10-342839 19981202; JP11-047912 19990225
- 主分类号： G03G9097
- IPC分类号： G03G9097
摘要：
A toner for developing an electrostatic image is disclosed. The toner comprises colored particles containing a resin and a colorant, the volume average particle diameter of said colored particles is 3 to 9 &mgr;m, the shape coefficient of said colored particles, which is described by the formula below, is 1.3 to 2.2, and the ratio of toner particles having a shape coefficient of 1.5 to 2.0 is at least 80 percent by number. Shape coefficient=[(maximum diameter/2)2×&pgr;]/(projection area) A developer and image forming method employing the toner are also disclosed.