JPS6473367A - Contact electrostatic charging device - Google Patents
Contact electrostatic charging deviceInfo
- Publication number
- JPS6473367A JPS6473367A JP23033387A JP23033387A JPS6473367A JP S6473367 A JPS6473367 A JP S6473367A JP 23033387 A JP23033387 A JP 23033387A JP 23033387 A JP23033387 A JP 23033387A JP S6473367 A JPS6473367 A JP S6473367A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- contact
- charging member
- electrostatic
- electrostatic charging
- 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
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
PURPOSE:To prevent a defect in electrostatic charging of the entire area by forming a surface layer as a resistance layer and a dielectric layer at the part of a contact electrostatic charging member which abuts on a body to be charged electrostatically and making the reactance to an AC voltage smaller than the resistance. CONSTITUTION:The surface layer 2C which becomes the resistance layer and dielectric layer is formed at the part of the contact electrostatic charging member and the contact electrostatic charging member 2 is given a resistance component and an electrostatic capacity component. Then the resistance is large enough not to cause a voltage drop due to a leak even if the body to be charged electrostatically has a pinhole, the electrostatic capacity is much larger than the electrostatic capacity of the body 1 to be charged electrostatically, and the reactance of the contact charging member 2 to the AC voltage VAC is much lower than the resistance of the contact charging member 2. Consequently, even if the body 1 to be charged has a pinhole, etc., the voltage drop across a feeding part due to the leak is precluded and a defect in electrostatic charging is precluded over the entire area where the contact charging member contacts the body.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23033387A JPS6473367A (en) | 1987-09-14 | 1987-09-14 | Contact electrostatic charging device |
EP88308464A EP0308185B1 (en) | 1987-09-14 | 1988-09-13 | A charging device |
DE3885830T DE3885830T2 (en) | 1987-09-14 | 1988-09-13 | Charger. |
US07/753,027 US5126913A (en) | 1987-09-14 | 1991-08-29 | Charging device with contactable charging means and an image forming apparatus having the charging means and a detachable process unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23033387A JPS6473367A (en) | 1987-09-14 | 1987-09-14 | Contact electrostatic charging device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6473367A true JPS6473367A (en) | 1989-03-17 |
JPH0516035B2 JPH0516035B2 (en) | 1993-03-03 |
Family
ID=16906194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23033387A Granted JPS6473367A (en) | 1987-09-14 | 1987-09-14 | Contact electrostatic charging device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6473367A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5398102A (en) * | 1992-04-21 | 1995-03-14 | Sharp Kabushiki Kaisha | Electrophotographic copier and charging means used therefor |
WO2012105987A1 (en) * | 2011-02-04 | 2012-08-09 | Hewlett-Packard Development Company, L.P. | Charge rollers and apparatus including charge rollers |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5764757A (en) * | 1980-10-08 | 1982-04-20 | Toshiba Corp | Charging device |
JPS58194061A (en) * | 1982-05-10 | 1983-11-11 | Toshiba Corp | Roll electrostatic charge device |
JPS60182451A (en) * | 1984-02-29 | 1985-09-18 | Canon Inc | Electrostatic charging device |
-
1987
- 1987-09-14 JP JP23033387A patent/JPS6473367A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5764757A (en) * | 1980-10-08 | 1982-04-20 | Toshiba Corp | Charging device |
JPS58194061A (en) * | 1982-05-10 | 1983-11-11 | Toshiba Corp | Roll electrostatic charge device |
JPS60182451A (en) * | 1984-02-29 | 1985-09-18 | Canon Inc | Electrostatic charging device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5398102A (en) * | 1992-04-21 | 1995-03-14 | Sharp Kabushiki Kaisha | Electrophotographic copier and charging means used therefor |
WO2012105987A1 (en) * | 2011-02-04 | 2012-08-09 | Hewlett-Packard Development Company, L.P. | Charge rollers and apparatus including charge rollers |
US9037045B2 (en) | 2011-02-04 | 2015-05-19 | Hewlett-Packard Development Company, L.P. | Charge rollers and apparatus including charge rollers |
Also Published As
Publication number | Publication date |
---|---|
JPH0516035B2 (en) | 1993-03-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment |
Free format text: PAYMENT UNTIL: 20080303 Year of fee payment: 15 |