发明授权
- 专利标题： Electrophotographic image forming apparatus, process cartridge developing device, developer supply container and measuring part therefor
- 专利标题（中）： 电子照相图像形成装置，处理盒显影装置，显影剂供应容器及其测量部件
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申请号： US09411394申请日： 1999-10-04
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公开(公告)号： US06463223B1公开(公告)日： 2002-10-08
- 发明人: Toshiyuki Karakama , Shirou Sakata , Hideki Matsumoto , Akiyoshi Yokoi
- 申请人： Toshiyuki Karakama , Shirou Sakata , Hideki Matsumoto , Akiyoshi Yokoi
- 优先权： JP10-303345 19981009
- 主分类号： G03G1500
- IPC分类号： G03G1500
摘要：
An electrophotographic image forming apparatus includes a first electrostatic-capacity generating portion disposed at such a position that the first electrostatic capacity generating portion contacts the developer accommodated in the developer accommodating portion. The first electrostatic capacity generates portion generating an electrostatic capacity corresponding to an amount of the developer. A second electrostatic-capacity generating portion is disposed at such a position that the second electrostatic-capacity generating portion does not contact the developer accommodated in the developer-accommodating portion. The second electrostatic capacity generating portion generates a reference electrostatic capacity. A developer amount detector is provided for detecting an amount of the developer accommodated in the developer-accommodating portion on the basis of the electrostatic capacity generated by the first electrostatic-capacity generating portion and the reference electrostatic capacity generated by the said second electrostatic-capacity generating portion.
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