JPS6459264A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS6459264A JPS6459264A JP21666587A JP21666587A JPS6459264A JP S6459264 A JPS6459264 A JP S6459264A JP 21666587 A JP21666587 A JP 21666587A JP 21666587 A JP21666587 A JP 21666587A JP S6459264 A JPS6459264 A JP S6459264A
- Authority
- JP
- Japan
- Prior art keywords
- electrostatic
- outputs
- current
- reference signal
- corona
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
PURPOSE:To set an output from an electrostatic charging means in a specific level by comparing a detected current with a reference signal in a comparison means and varying a power supplied to the electrostatic charging means from a power source means according to the compared result. CONSTITUTION:According to the actions of the electrostatic chargers 12-14, the current which flows from a photosensitive drum 11 is converted into a voltage value by a current voltage conversion circuit 24. And the voltage value and the previously set reference signal are compared in the comparison circuits 26-28 so as to obtain a set level, according to which the outputs from the high voltage transformers 18-20 are varied. Namely, the outputs from the high voltage transformers 18-20 are set according to the corona outputs of the electrostatic chargers 12-14. Thus, the corona output from the electrostatic charger can be set in the specific value even if the electrostatic charger is stained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21666587A JPS6459264A (en) | 1987-08-31 | 1987-08-31 | Image forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21666587A JPS6459264A (en) | 1987-08-31 | 1987-08-31 | Image forming device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6459264A true JPS6459264A (en) | 1989-03-06 |
Family
ID=16692008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21666587A Pending JPS6459264A (en) | 1987-08-31 | 1987-08-31 | Image forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6459264A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4002013A1 (en) * | 1989-03-23 | 1990-09-27 | Toshiba Kawasaki Kk | System for adjusting output of charging units for image prodn. - includes unit for charging light responsive or photo-conductor drum and discharge lamp which clears charge produced on drum |
JPH034248A (en) * | 1989-05-31 | 1991-01-10 | Mita Ind Co Ltd | Method and device for surface potential control |
JPH05142957A (en) * | 1991-11-26 | 1993-06-11 | Sharp Corp | Image forming device |
-
1987
- 1987-08-31 JP JP21666587A patent/JPS6459264A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4002013A1 (en) * | 1989-03-23 | 1990-09-27 | Toshiba Kawasaki Kk | System for adjusting output of charging units for image prodn. - includes unit for charging light responsive or photo-conductor drum and discharge lamp which clears charge produced on drum |
JPH034248A (en) * | 1989-05-31 | 1991-01-10 | Mita Ind Co Ltd | Method and device for surface potential control |
JPH05142957A (en) * | 1991-11-26 | 1993-06-11 | Sharp Corp | Image forming device |
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