JPS5532080A - Toner scatter preventive device in electrophotographic copier - Google Patents

Toner scatter preventive device in electrophotographic copier

Info

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
Application number
JP10537378A
Other languages
Japanese (ja)
Other versions
JPS6235109B2 (en
Inventor
Kazuaki Tagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP10537378A priority Critical patent/JPS5532080A/en
Priority to US06/204,364 priority patent/US4351603A/en
Priority to DE7979901014T priority patent/DE2967287D1/en
Priority to PCT/JP1979/000221 priority patent/WO1980000502A1/en
Publication of JPS5532080A publication Critical patent/JPS5532080A/en
Priority to EP79901014A priority patent/EP0020768B1/en
Publication of JPS6235109B2 publication Critical patent/JPS6235109B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

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.
JP10537378A 1978-08-28 1978-08-29 Toner scatter preventive device in electrophotographic copier Granted JPS5532080A (en)

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
US06/204,364 US4351603A (en) 1978-08-28 1979-08-21 Electronic copying apparatus
DE7979901014T DE2967287D1 (en) 1978-08-28 1979-08-21 Electrophotographic copying machine
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)

* Cited by examiner, † Cited by third party
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
JPS6161559U (en) * 1984-09-26 1986-04-25
JPS6161558U (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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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 (7)

* Cited by examiner, † Cited by third party
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
JPS6161559U (en) * 1984-09-26 1986-04-25
JPS6161558U (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

Also Published As

Publication number Publication date
JPS6235109B2 (en) 1987-07-30

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