发明名称 |
Image forming apparatus having a developer deterioration detecting device. |
摘要 |
<p>An image forming apparatus which detects deterioration of developer contained in a developing unit, and if it is the case, the toner is discharged out of the developing unit through a surface of an image carrying member. The apparatus is provided with a sensor to measure toner concentration in developer contained in the developing unit, a drive controller to control a supply amount of toner into the developing unit based on the toner concentration, a calculating unit to obtain average toner supply during a predetermined period, a detecting unit to detect the deterioration of the developer by comparing the average toner supply with a reference data stored in a memory. <IMAGE></p> |
申请公布号 |
EP0487009(A2) |
申请公布日期 |
1992.05.27 |
申请号 |
EP19910119677 |
申请日期 |
1991.11.19 |
申请人 |
KONICA CORPORATION |
发明人 |
YOSHINO, KUNIHISA;MOTOHASHI, MITSUO;OKAMOTO, YUKIO;TUCHIYA, TAKAHIRO;HAMADA, JUN-ICHI |
分类号 |
G03G15/01;G03G15/08 |
主分类号 |
G03G15/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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