发明授权
- 专利标题: Carrier for electrostatic latent image developing and two-component-type developing agent using the same
- 专利标题(中): 静电潜像显影用载体及使用其的双组分型显影剂
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申请号: US461426申请日: 1999-12-16
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公开(公告)号: US6127079A公开(公告)日: 2000-10-03
- 发明人: Tadao Sumiyoshi , Tomohide Iida
- 申请人: Tadao Sumiyoshi , Tomohide Iida
- 申请人地址: JPX Osaka
- 专利权人: Kyocera Mita Corporation
- 当前专利权人: Kyocera Mita Corporation
- 当前专利权人地址: JPX Osaka
- 优先权: JPX10-365935 19981224
- 主分类号: G03G9/08
- IPC分类号: G03G9/08 ; G03G9/10 ; G03G9/107 ; G03G9/113
摘要:
A two-component-type developing agent comprising a silicone resin-coated carrier and a positively charging toner, the silicone coated carrier having an average particle diameter of from 60 to 110 .mu.m, the silicone resin coating having an average thickness of from 0.1 to 0.3 .mu.m, the carrier having a resistivity of from 1.5.times.10.sup.8 to 1.5.times.10.sup.11 .OMEGA..multidot.cm, the toner concentration being from 3.0 to 5.0 % by weight and the amount of electric charge by friction of the toner based on the suction method being from +10 to +20 .mu.c/g. The silicone resin-coated carrier and the developing agent feature long life without permitting the spent toner to adhere on the carrier surfaces, without permitting the carrier coating to peel off even after repetitively used for extended periods of time, featuring stable amount of electric charge by friction, stable developing properties, and maintaining favorable image quality for extended periods of time developing none of carrier dragging, toner scattering in the machine, background fogging or defective image density.
公开/授权文献
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