JPS5536856A - High voltage power source device for electrophotographic copier - Google Patents
High voltage power source device for electrophotographic copierInfo
- Publication number
- JPS5536856A JPS5536856A JP11014478A JP11014478A JPS5536856A JP S5536856 A JPS5536856 A JP S5536856A JP 11014478 A JP11014478 A JP 11014478A JP 11014478 A JP11014478 A JP 11014478A JP S5536856 A JPS5536856 A JP S5536856A
- Authority
- JP
- Japan
- Prior art keywords
- reference voltage
- voltage generating
- high voltage
- generating circuit
- power source
- 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
Abstract
PURPOSE: To obtain stable surface potentials of photoreceptor and images by correcting reference voltage in correspondence to environmental changes.
CONSTITUTION: A sensor 8 which detects environmental changes such as humidity, temperature and atmospheric pressure is disposed near a corona discharge part 3 and is connected to a reference voltage generating circuit 9. Then, the current or voltage of a high voltage generating unit 2 is detected by a detector 7 and is compared with the reference voltage of the reference voltage generating circuit 9 in a subtractor 10 and comparing amplifier 11, causing a driving circuit 1 to be controlled via control circuit 12 so as to provide the constant current or constant voltage. The environmental change near the corona discharge part 3 is detected by the sensor 8 and the reference voltage of the reference voltage generating circuit 9 is corrected. Hence, always stable surface potentials of a photoreceptor 4 may be obtained and the superior copying images are formed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11014478A JPS5536856A (en) | 1978-09-06 | 1978-09-06 | High voltage power source device for electrophotographic copier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11014478A JPS5536856A (en) | 1978-09-06 | 1978-09-06 | High voltage power source device for electrophotographic copier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5536856A true JPS5536856A (en) | 1980-03-14 |
Family
ID=14528146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11014478A Pending JPS5536856A (en) | 1978-09-06 | 1978-09-06 | High voltage power source device for electrophotographic copier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5536856A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5766445A (en) * | 1980-10-11 | 1982-04-22 | Ricoh Co Ltd | Controlling method for extent of charging of electrophotographic copying machine |
JPS58152267A (en) * | 1982-03-04 | 1983-09-09 | Murata Mfg Co Ltd | Electrophotographic copying device |
JPS60242479A (en) * | 1984-05-16 | 1985-12-02 | Fuji Electric Co Ltd | Method for stabilizing electrification of electrophotographic sensitive body |
JPS6141947U (en) * | 1984-08-23 | 1986-03-18 | 川崎重工業株式会社 | Camchen tension guide mounting structure |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49106336A (en) * | 1973-01-18 | 1974-10-08 | ||
JPS5393029A (en) * | 1977-01-27 | 1978-08-15 | Ricoh Co Ltd | Copying process control method of electrophotographic copying machine |
-
1978
- 1978-09-06 JP JP11014478A patent/JPS5536856A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49106336A (en) * | 1973-01-18 | 1974-10-08 | ||
JPS5393029A (en) * | 1977-01-27 | 1978-08-15 | Ricoh Co Ltd | Copying process control method of electrophotographic copying machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5766445A (en) * | 1980-10-11 | 1982-04-22 | Ricoh Co Ltd | Controlling method for extent of charging of electrophotographic copying machine |
JPS58152267A (en) * | 1982-03-04 | 1983-09-09 | Murata Mfg Co Ltd | Electrophotographic copying device |
JPS60242479A (en) * | 1984-05-16 | 1985-12-02 | Fuji Electric Co Ltd | Method for stabilizing electrification of electrophotographic sensitive body |
JPS6141947U (en) * | 1984-08-23 | 1986-03-18 | 川崎重工業株式会社 | Camchen tension guide mounting structure |
JPS6240198Y2 (en) * | 1984-08-23 | 1987-10-14 |
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