发明名称 |
Vorrichtung zum Ermitteln eines restlichen Tonerpegels |
摘要 |
The present invention provides a developing device of an electrophotographic recording system for developing an electrostatic latent image formed on a photosensitive drum. The developing device includes a hopper which stores toner and a developing roller which develops the electrostatic latent image formed on the photosensitive drum using the toner stored in the hopper. On one side of the hopper at a predetermined height from its bottom, a light-emitting element for emitting light is positioned. A toner detecting device detects the existence or non-existence of toner by using a light-receiving element positioned on the interior of the hopper which outputs signals corresponding to the existence or non-existence of toner in the hopper in response to the amount of the light received from the light-emitting element. An agitator conveys the toner to the developing roller and simultaneously cleans a light-emitting side of the light-emitting element and a light-receiving side of the light-receiving element in synchronism with a conveyance period of the toner. A signal transmitting device transmits signals from the light-receiving element to a CPU which compares the number of signals with a predetermined value, thereby determining a level of the toner. |
申请公布号 |
DE19506578(C2) |
申请公布日期 |
2003.03.06 |
申请号 |
DE1995106578 |
申请日期 |
1995.02.24 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
JO, HAE-SEOG;KO, CHANG-KYUNG;LEE, DONG-HO |
分类号 |
G03G15/08;(IPC1-7):G03G15/06;G03G21/00 |
主分类号 |
G03G15/08 |
代理机构 |
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代理人 |
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主权项 |
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