发明授权
- 专利标题: Toner, two-component developer and image forming method
- 专利标题(中): 调色剂,双组分显影剂和成像方法
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申请号: US99527申请日: 1998-06-18
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公开(公告)号: US6077635A公开(公告)日: 2000-06-20
- 发明人: Kenji Okado , Ryoichi Fujita , Wakashi Iida , Yuji Moriki , Kazumi Yoshizaki , Michihisa Magome
- 申请人: Kenji Okado , Ryoichi Fujita , Wakashi Iida , Yuji Moriki , Kazumi Yoshizaki , Michihisa Magome
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX9-160792 19970618; JPX9-274049 19971007
- 主分类号: G03G9/08
- IPC分类号: G03G9/08 ; G03G9/097 ; G03G13/01
摘要:
A toner is disclosed which has toner particles and an external additive. The toner has (a) in circularity distribution of particles measured with a flow type particle image analyzer, an average circularity of from 0.920 to 0.995, containing particles with a circularity of less than 0.950 in an amount of from 2% by number to 40% by number; and (b) a weight-average particle diameter of from 2.0 .mu.m to 9.0 .mu.m as measured by Coulter method. The external additive has, on the toner particles, at least (i) an inorganic fine powder (A) present in the state of primary particles or secondary particles and having an average particle length of from 10 m.mu.m to 400 m.mu.m and a shape factor SF-1 of from 100 to 130 and (ii) a non-spherical inorganic fine powder (B) formed by coalescence of a plurality of particles and having a shape factor SF-1 of greater than 150. Also, a two-component developer and an image forming method, using the toner, are disclosed.
公开/授权文献
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