JPS6435459A - Electrostatic charging method - Google Patents
Electrostatic charging methodInfo
- Publication number
- JPS6435459A JPS6435459A JP19130587A JP19130587A JPS6435459A JP S6435459 A JPS6435459 A JP S6435459A JP 19130587 A JP19130587 A JP 19130587A JP 19130587 A JP19130587 A JP 19130587A JP S6435459 A JPS6435459 A JP S6435459A
- Authority
- JP
- Japan
- Prior art keywords
- potential
- drum
- vth
- surface potential
- difference
- 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 a uniformly charged surface with a desired potential by charging the surface of an object body of electrostatic charging to a surface potential V1 and bringing a conductive member which has a surface potential V2 into contact while ¦V1-V2¦>¦VTH¦ where VTH is the charge movement start potential difference of the object body. CONSTITUTION:A photosensitive drum 1 is rubbed against a frictional electrostatic charging roller 4 which is driven in a rotating process in the opposite direction from the drum 1 and its surface is charged electrostatically to a negative surface potential V1. Then the conductive rubber roller 3 which has the surface potential V2 satisfying ¦V1-V2¦>VTH¦ when VTH is the charge movement start potential difference of the drum 1 is brought into contact and the difference between the surface potential V1 of the drum 1 and the surface potential V2 of the conductive rubber roller 2 exceeds the charge movement start potential difference VTH of the in-use photosensitive body to the overall lengthwise size of the photosensitive drum 1; and the surface potential V of the drum 1 is held at a desired potential entirely on the drum 1 lengthwise to obtain the uniform charged surface, thereby performing electrostatic discharging.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19130587A JPS6435459A (en) | 1987-07-30 | 1987-07-30 | Electrostatic charging method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19130587A JPS6435459A (en) | 1987-07-30 | 1987-07-30 | Electrostatic charging method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435459A true JPS6435459A (en) | 1989-02-06 |
Family
ID=16272352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19130587A Pending JPS6435459A (en) | 1987-07-30 | 1987-07-30 | Electrostatic charging method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435459A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5881343A (en) * | 1996-07-09 | 1999-03-09 | Minolta Co., Ltd. | Charging method and charging device |
US7962055B2 (en) | 2006-04-19 | 2011-06-14 | Ricoh Company, Ltd. | Image forming apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59171971A (en) * | 1983-03-18 | 1984-09-28 | Ricoh Co Ltd | Electrifier |
JPS60179760A (en) * | 1984-02-28 | 1985-09-13 | Fuji Xerox Co Ltd | Device for charging photosensitive body of electronic copying machine |
-
1987
- 1987-07-30 JP JP19130587A patent/JPS6435459A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59171971A (en) * | 1983-03-18 | 1984-09-28 | Ricoh Co Ltd | Electrifier |
JPS60179760A (en) * | 1984-02-28 | 1985-09-13 | Fuji Xerox Co Ltd | Device for charging photosensitive body of electronic copying machine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5881343A (en) * | 1996-07-09 | 1999-03-09 | Minolta Co., Ltd. | Charging method and charging device |
US7962055B2 (en) | 2006-04-19 | 2011-06-14 | Ricoh Company, Ltd. | Image forming apparatus |
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