JPS5545059A - Reversal bias developing method - Google Patents
Reversal bias developing methodInfo
- Publication number
- JPS5545059A JPS5545059A JP11866278A JP11866278A JPS5545059A JP S5545059 A JPS5545059 A JP S5545059A JP 11866278 A JP11866278 A JP 11866278A JP 11866278 A JP11866278 A JP 11866278A JP S5545059 A JPS5545059 A JP S5545059A
- Authority
- JP
- Japan
- Prior art keywords
- bias voltage
- developing
- developing sleeve
- image
- photosensitive drum
- 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.)
- Granted
Links
Abstract
PURPOSE:To prevent deposition of toner on non-image portions by changing over the bias voltage of a developing sleeve in timing to the time when the specified position on the surface of a photosensitive drum opposes to the developing sleeve thereby cutting the application of the voltage or lowering the same. CONSTITUTION:Application of bias voltage to a developing sleeve 3 is accomplished at the time when the position on the surface of a photosensitive drum 1 which is within the charging region of the surface of the drum and does not enter the image region of the photosensitive drum 1 surface arrives at the position oppositing to the developing sleeve 3. On the other hand, changing-over of the developing bias voltage to the OFF state is accomplished at the time when the surface position of the drum 1 opposing to the developing roller 3 is within the charging region after passage of the end part of the image region. Operation in this way reduces the range of the non-image portions where the developing bias voltage is being applied and reduces the pickup of the toner on the non-image parts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11866278A JPS5545059A (en) | 1978-09-28 | 1978-09-28 | Reversal bias developing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11866278A JPS5545059A (en) | 1978-09-28 | 1978-09-28 | Reversal bias developing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5545059A true JPS5545059A (en) | 1980-03-29 |
JPS6240711B2 JPS6240711B2 (en) | 1987-08-29 |
Family
ID=14742105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11866278A Granted JPS5545059A (en) | 1978-09-28 | 1978-09-28 | Reversal bias developing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5545059A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56165171A (en) * | 1980-05-01 | 1981-12-18 | Canon Inc | Image forming device |
JPS60249171A (en) * | 1984-05-25 | 1985-12-09 | Konishiroku Photo Ind Co Ltd | Image forming method |
JPS61277977A (en) * | 1985-06-04 | 1986-12-08 | Canon Inc | Image forming device |
JPS6311971A (en) * | 1986-07-03 | 1988-01-19 | Canon Inc | Image forming device |
JPS6313080A (en) * | 1986-07-03 | 1988-01-20 | Canon Inc | Electrophotographic device providing reversal development |
JPS6337365A (en) * | 1986-07-31 | 1988-02-18 | Sharp Corp | Inverted image forming method |
US4984022A (en) * | 1987-11-26 | 1991-01-08 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having means for attenuating bias voltage of the developing sleeve |
US5132738A (en) * | 1987-12-28 | 1992-07-21 | Canon Kabushiki Kaisha | Image forming apparatus with cleaning mechanism for charging electrode |
EP0693714A1 (en) * | 1994-07-21 | 1996-01-24 | Brother Kogyo Kabushiki Kaisha | Method and apparatus for controlling discharge potentials and timing in a reversal development type image forming apparatus |
US5500720A (en) * | 1992-12-30 | 1996-03-19 | Ricoh Company, Ltd. | Bias application control device for image forming apparatus using reverse development |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4838152A (en) * | 1971-09-10 | 1973-06-05 |
-
1978
- 1978-09-28 JP JP11866278A patent/JPS5545059A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4838152A (en) * | 1971-09-10 | 1973-06-05 |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6339054B2 (en) * | 1980-05-01 | 1988-08-03 | Canon Kk | |
JPS56165171A (en) * | 1980-05-01 | 1981-12-18 | Canon Inc | Image forming device |
JPH0435074B2 (en) * | 1984-05-25 | 1992-06-09 | Konishiroku Photo Ind | |
JPS60249171A (en) * | 1984-05-25 | 1985-12-09 | Konishiroku Photo Ind Co Ltd | Image forming method |
JPS61277977A (en) * | 1985-06-04 | 1986-12-08 | Canon Inc | Image forming device |
JPH0253793B2 (en) * | 1985-06-04 | 1990-11-19 | Canon Kk | |
JPS6311971A (en) * | 1986-07-03 | 1988-01-19 | Canon Inc | Image forming device |
JPS6313080A (en) * | 1986-07-03 | 1988-01-20 | Canon Inc | Electrophotographic device providing reversal development |
JPS6337365A (en) * | 1986-07-31 | 1988-02-18 | Sharp Corp | Inverted image forming method |
JPH0535868B2 (en) * | 1986-07-31 | 1993-05-27 | Sharp Kk | |
US4984022A (en) * | 1987-11-26 | 1991-01-08 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having means for attenuating bias voltage of the developing sleeve |
US5132738A (en) * | 1987-12-28 | 1992-07-21 | Canon Kabushiki Kaisha | Image forming apparatus with cleaning mechanism for charging electrode |
US5500720A (en) * | 1992-12-30 | 1996-03-19 | Ricoh Company, Ltd. | Bias application control device for image forming apparatus using reverse development |
EP0693714A1 (en) * | 1994-07-21 | 1996-01-24 | Brother Kogyo Kabushiki Kaisha | Method and apparatus for controlling discharge potentials and timing in a reversal development type image forming apparatus |
US5652953A (en) * | 1994-07-21 | 1997-07-29 | Brother Kogyo Kabushiki Kaisha | Method and apparatus for controlling discharge potentials and timing in a reversal development type image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS6240711B2 (en) | 1987-08-29 |
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