发明名称 |
Image-quality stabilizer for an electrophotographic apparatus |
摘要 |
An image-quality stabilizer for an electrophotographic apparatus forms a toner patch on a photoreceptor drum, detects the amount of toner attracted to the photoreceptor drum by an optical sensor, and controls each processing device so that the detected value is equal to a reference value which has been detected and stored when the number of image forming operations performed is low. After the control, the toner patch is transferred to a transfer sheet, and the amount of toner remaining on the photoreceptor drum is detected. The reference value is adjusted based on the detected value so as to compensate for a lowering of transfer efficiency. Or the lowering of transfer efficiency is compensated by controlling variables such as transfer output so that the detected value is equal to a reference residual value which has been detected and stored when the number of image forming operations performed is low. This arrangement restrains a lowering of image density due to a change in the transfer efficiency. It is therefore possible to control stabilizing the image quality accurately and to form images of stable quality.
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申请公布号 |
US5333037(A) |
申请公布日期 |
1994.07.26 |
申请号 |
US19930022740 |
申请日期 |
1993.02.24 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
INOUE, KATSUSHI;MASUDA, JITSUO;NOGUCHI, TERUHIKO;KAWABATA, ITARU |
分类号 |
G03G15/00;G03G15/16;(IPC1-7):G03G21/00 |
主分类号 |
G03G15/00 |
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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