JPS5518631A - Developing and cleaning device in electrophotographic copier and others - Google Patents

Developing and cleaning device in electrophotographic copier and others

Info

Publication number
JPS5518631A
JPS5518631A JP9151378A JP9151378A JPS5518631A JP S5518631 A JPS5518631 A JP S5518631A JP 9151378 A JP9151378 A JP 9151378A JP 9151378 A JP9151378 A JP 9151378A JP S5518631 A JPS5518631 A JP S5518631A
Authority
JP
Japan
Prior art keywords
developer
cleaning
developing
ears
toner
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
JP9151378A
Other languages
Japanese (ja)
Other versions
JPS6223867B2 (en
Inventor
Masaaki Umehara
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 JP9151378A priority Critical patent/JPS5518631A/en
Publication of JPS5518631A publication Critical patent/JPS5518631A/en
Publication of JPS6223867B2 publication Critical patent/JPS6223867B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE: To improve cleaning effect and obtain good quality copying by providing an electode near the ears of developer and changing the polarity of electrode potentials at the time of developing and cleaning thereby changing the oner concentrations of the developer.
CONSTITUTION: A developer and cleaning device 4 has the combination of the function of converting the electrostatic latent images of a photosensitive drum 1 to sensible images and the function of cleaning the toner remained on the surface of this drum 1. There are a developer scooping up magnet 11, a main magnet 12 and an auxiliary magnet 13 in the sleeve 10 which is accommodated in a developing tank 9 for containing the developer 5 composed of toner and carrier. When an electrode 16 is provided amoung the ears 5a of the developer brush formed by a doctor plate 15 and sleeve 10 and the potential polarity of the electrode 16 is changed by changing over the bias voltage thereof at the time of cleaning and developing, then the toner concentrations of the developer in the ears 5a decrease during cleaning, thus effective cleaning may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
JP9151378A 1978-07-28 1978-07-28 Developing and cleaning device in electrophotographic copier and others Granted JPS5518631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9151378A JPS5518631A (en) 1978-07-28 1978-07-28 Developing and cleaning device in electrophotographic copier and others

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9151378A JPS5518631A (en) 1978-07-28 1978-07-28 Developing and cleaning device in electrophotographic copier and others

Publications (2)

Publication Number Publication Date
JPS5518631A true JPS5518631A (en) 1980-02-08
JPS6223867B2 JPS6223867B2 (en) 1987-05-26

Family

ID=14028478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9151378A Granted JPS5518631A (en) 1978-07-28 1978-07-28 Developing and cleaning device in electrophotographic copier and others

Country Status (1)

Country Link
JP (1) JPS5518631A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215381A (en) * 1982-06-08 1983-12-14 Fujitsu Ltd Control system of constant speed of carriage
EP0849644A2 (en) * 1996-12-20 1998-06-24 Océ-Nederland B.V. Reversal developing system
JP2005352431A (en) * 2004-06-14 2005-12-22 Ricoh Co Ltd Image forming apparatus, process cartridge and cleaning-less system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012155131A (en) 2011-01-26 2012-08-16 Canon Inc Developing device and image forming apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5262025A (en) * 1975-11-17 1977-05-23 Ricoh Co Ltd Cleaning of light sensitive material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5262025A (en) * 1975-11-17 1977-05-23 Ricoh Co Ltd Cleaning of light sensitive material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215381A (en) * 1982-06-08 1983-12-14 Fujitsu Ltd Control system of constant speed of carriage
EP0849644A2 (en) * 1996-12-20 1998-06-24 Océ-Nederland B.V. Reversal developing system
EP0849644A3 (en) * 1996-12-20 1998-07-01 Océ-Nederland B.V. Reversal developing system
JP2005352431A (en) * 2004-06-14 2005-12-22 Ricoh Co Ltd Image forming apparatus, process cartridge and cleaning-less system
JP4558383B2 (en) * 2004-06-14 2010-10-06 株式会社リコー Image forming apparatus and process cartridge

Also Published As

Publication number Publication date
JPS6223867B2 (en) 1987-05-26

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