JPS5532080A - Toner scatter preventive device in electrophotographic copier - Google Patents
Toner scatter preventive device in electrophotographic copierInfo
- Publication number
- JPS5532080A JPS5532080A JP10537378A JP10537378A JPS5532080A JP S5532080 A JPS5532080 A JP S5532080A JP 10537378 A JP10537378 A JP 10537378A JP 10537378 A JP10537378 A JP 10537378A JP S5532080 A JPS5532080 A JP S5532080A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- electrode
- drum
- vicinity
- image holding
- 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 effectively prevent scattering of toner powder from the image holding body in a simple device, by providing a conductive electrode plate applied with the voltage of the same polartiy as the toner powder in the vicinity of the image holding plane of the image holding body. CONSTITUTION:A first toner scatter preventive electrode 24 made of conductive material having an arc cross section is provided between the developing part and the transfer part, in the vicinity of a photosensitive drum 4. A positive voltage of the same polarity as the magnetic toner deposited on the drum surface is applied to the electrode 24, and the toner is pressed against the drum surface with the force due to the product q1XE1 of the toner charge q1 and the electric field E1 of the electrode 24, thereby preventing the toner from scattering from the drum 4 by means of air stream or the like. Next to a separation pawl 30 of the transfer paper behind the transfer part is provided a second toner scatter preventive electrode 32 in the vicinity of the photosensitive drum 4. A voltage of the same polarity as the toner charged in the same polarity as the polarity of the residual electric charge in the photosensitive layer is applied to the electrode 32, and the toner is pressed against the drum 4 with the force due to the product q2XE2 of the toner charge q2 and the electric field E2 of the electrode 32, so that scattering of the toner from the drum surface may be prevented.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10537378A JPS5532080A (en) | 1978-08-29 | 1978-08-29 | Toner scatter preventive device in electrophotographic copier |
DE7979901014T DE2967287D1 (en) | 1978-08-28 | 1979-08-21 | Electrophotographic copying machine |
US06/204,364 US4351603A (en) | 1978-08-28 | 1979-08-21 | Electronic copying apparatus |
PCT/JP1979/000221 WO1980000502A1 (en) | 1978-08-28 | 1979-08-21 | Electrophotographic copying machine |
EP79901014A EP0020768B1 (en) | 1978-08-28 | 1980-03-25 | Electrophotographic copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10537378A JPS5532080A (en) | 1978-08-29 | 1978-08-29 | Toner scatter preventive device in electrophotographic copier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5532080A true JPS5532080A (en) | 1980-03-06 |
JPS6235109B2 JPS6235109B2 (en) | 1987-07-30 |
Family
ID=14405884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10537378A Granted JPS5532080A (en) | 1978-08-28 | 1978-08-29 | Toner scatter preventive device in electrophotographic copier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5532080A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55159467A (en) * | 1979-05-30 | 1980-12-11 | Fuji Xerox Co Ltd | Photographic fog removing device of electrophotographic copier |
JPS6114674A (en) * | 1984-06-29 | 1986-01-22 | Canon Inc | Corona discharge device |
JPS6161558U (en) * | 1984-09-26 | 1986-04-25 | ||
JPS6161559U (en) * | 1984-09-26 | 1986-04-25 | ||
JPS61217070A (en) * | 1985-03-22 | 1986-09-26 | Canon Inc | Image forming device |
JP2008032966A (en) * | 2006-07-28 | 2008-02-14 | Ricoh Co Ltd | Lubricant supply device, cleaning device, process cartridge and image forming apparatus |
JP2012058749A (en) * | 2011-11-04 | 2012-03-22 | Ricoh Co Ltd | Lubricant supply device, cleaning device, process cartridge, and image forming apparatus |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4944133U (en) * | 1972-07-24 | 1974-04-18 | ||
JPS519458A (en) * | 1974-07-13 | 1976-01-26 | Ricoh Kk | DENSHISHASHINFUKUSHAKINIOKERU FUKUSHASHINO HAKURISOCHI |
JPS5178239A (en) * | 1974-12-27 | 1976-07-07 | Canon Kk | DENSHISHA SHINHO |
JPS5197435A (en) * | 1975-02-24 | 1976-08-27 |
-
1978
- 1978-08-29 JP JP10537378A patent/JPS5532080A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4944133U (en) * | 1972-07-24 | 1974-04-18 | ||
JPS519458A (en) * | 1974-07-13 | 1976-01-26 | Ricoh Kk | DENSHISHASHINFUKUSHAKINIOKERU FUKUSHASHINO HAKURISOCHI |
JPS5178239A (en) * | 1974-12-27 | 1976-07-07 | Canon Kk | DENSHISHA SHINHO |
JPS5197435A (en) * | 1975-02-24 | 1976-08-27 |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55159467A (en) * | 1979-05-30 | 1980-12-11 | Fuji Xerox Co Ltd | Photographic fog removing device of electrophotographic copier |
JPS6326391B2 (en) * | 1979-05-30 | 1988-05-30 | Fuji Xerox Co Ltd | |
JPS6114674A (en) * | 1984-06-29 | 1986-01-22 | Canon Inc | Corona discharge device |
JPH0533394B2 (en) * | 1984-06-29 | 1993-05-19 | Canon Kk | |
JPS6161558U (en) * | 1984-09-26 | 1986-04-25 | ||
JPS6161559U (en) * | 1984-09-26 | 1986-04-25 | ||
JPH0440203Y2 (en) * | 1984-09-26 | 1992-09-21 | ||
JPS61217070A (en) * | 1985-03-22 | 1986-09-26 | Canon Inc | Image forming device |
JPH0574821B2 (en) * | 1985-03-22 | 1993-10-19 | Canon Kk | |
JP2008032966A (en) * | 2006-07-28 | 2008-02-14 | Ricoh Co Ltd | Lubricant supply device, cleaning device, process cartridge and image forming apparatus |
JP2012058749A (en) * | 2011-11-04 | 2012-03-22 | Ricoh Co Ltd | Lubricant supply device, cleaning device, process cartridge, and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS6235109B2 (en) | 1987-07-30 |
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