发明授权
US5519316A Method and apparatus for measuring a toner concentration of a
two-component developer
失效
用于测量双组分显影剂的调色剂浓度的方法和装置
- 专利标题： Method and apparatus for measuring a toner concentration of a two-component developer
- 专利标题（中）： 用于测量双组分显影剂的调色剂浓度的方法和装置
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申请号： US337438申请日： 1994-11-08
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公开(公告)号： US5519316A公开(公告)日： 1996-05-21
- 发明人: Tomoe Hagiwara , Mitsuo Aoki , Masanori Suzuki , Tomio Kondou , Takahisa Kato
- 申请人： Tomoe Hagiwara , Mitsuo Aoki , Masanori Suzuki , Tomio Kondou , Takahisa Kato
- 申请人地址： JPX 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： JPX Tokyo
- 优先权： JPX5-302417 19931108; JPX6-292033 19941102
- 主分类号： G01N27/72
- IPC分类号： G01N27/72 ; G01N27/74 ; G03G9/08 ; G03G9/10 ; G03G15/08 ; G03G15/09
摘要：
In an electrophotographic or electrostatic image forming device, the toner concentration of a two-component developer, i.e., a mixture of toner and carrier is measured on the basis of an output of a magnetic bridge type concentration sensor responsive to the magnetic permeability of the developer. The sensor has a surface whose mean roughness along the center line is less than 0.4 .mu.m Ra.
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