EP0967528A3 - Developing device - Google Patents

Developing device Download PDF

Info

Publication number
EP0967528A3
EP0967528A3 EP99111926A EP99111926A EP0967528A3 EP 0967528 A3 EP0967528 A3 EP 0967528A3 EP 99111926 A EP99111926 A EP 99111926A EP 99111926 A EP99111926 A EP 99111926A EP 0967528 A3 EP0967528 A3 EP 0967528A3
Authority
EP
European Patent Office
Prior art keywords
developer
developing
developing roller
layer
roller
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
EP99111926A
Other languages
German (de)
French (fr)
Other versions
EP0967528B1 (en
EP0967528A2 (en
Inventor
Tadashi Iwamatsu
Nobuyuki Azuma
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of EP0967528A2 publication Critical patent/EP0967528A2/en
Publication of EP0967528A3 publication Critical patent/EP0967528A3/en
Application granted granted Critical
Publication of EP0967528B1 publication Critical patent/EP0967528B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/06—Developing
    • G03G13/08—Developing using a solid developer, e.g. powder developer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Developing For Electrophotography (AREA)

Abstract

A developing device for developing an electrostatic latent image on a photoconductive member has a developing roller that bears a one-component developer on its surface and develops the electrostatic latent image by contacting the photoconductive member; a supply roller for supplying developer to the developing roller; and a blade that contacts the developing roller so as to regulate a layer thickness of the developer supplied by the supply roller, wherein supposing that the developer has a volume-average particle size represented by Dbk, the developer at this time being maintained on the developing roller as a layer that has been supplied by the supply roller and again formed so as to have a predetermined thickness by the blade after the developing roller, on which the developer was formed as a layer having a predetermined thickness, carried out a black-image developing process, and supposing that the volume-average particle size of the developer is Dwt, the developer at this time being maintained on the developing roller as a layer that has been supplied by the supply roller and again formed so as to have a predetermined thickness by the blade after the developing roller, on which the developer was formed as a layer having a predetermined thickness, carried out a white-image developing process, an inequality, Dwt/Dbk > 0.8, is satisfied.
EP19990111926 1998-06-22 1999-06-22 Developing device Expired - Lifetime EP0967528B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17426098 1998-06-22
JP17426098A JP2000010404A (en) 1998-06-22 1998-06-22 Developing device

Publications (3)

Publication Number Publication Date
EP0967528A2 EP0967528A2 (en) 1999-12-29
EP0967528A3 true EP0967528A3 (en) 2001-01-31
EP0967528B1 EP0967528B1 (en) 2003-09-03

Family

ID=15975534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990111926 Expired - Lifetime EP0967528B1 (en) 1998-06-22 1999-06-22 Developing device

Country Status (4)

Country Link
EP (1) EP0967528B1 (en)
JP (1) JP2000010404A (en)
CN (1) CN1120388C (en)
DE (1) DE69910907T2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006215243A (en) * 2005-02-03 2006-08-17 Canon Inc Toner and full-color image forming method
JP2007333829A (en) 2006-06-13 2007-12-27 Konica Minolta Business Technologies Inc Toner supply roller, developing device and image forming apparatus
JP2009150949A (en) * 2007-11-29 2009-07-09 Ricoh Co Ltd Nonmagnetic single component development device, image forming apparatus, and nonmagnetic single component development method
JP5377159B2 (en) * 2008-08-29 2013-12-25 キヤノン株式会社 Image forming apparatus
JP4981842B2 (en) * 2009-04-20 2012-07-25 株式会社沖データ Image forming apparatus
CN101893836B (en) * 2010-04-01 2011-11-16 珠海天威飞马打印耗材有限公司 Processing box

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987454A (en) * 1988-06-17 1991-01-22 Minolta Camera Kabushiki Kaisha Developing method for developing electrostatic latent image
JPH05188765A (en) * 1992-01-16 1993-07-30 Toshiba Corp Developing device
US5387967A (en) * 1993-09-23 1995-02-07 Xerox Corporation Single-component electrophotographic development system
US5477006A (en) * 1992-05-29 1995-12-19 Kabushiki Kaisha Toshiba Developing device having developing roller and conductive member
JPH09311542A (en) * 1996-05-22 1997-12-02 Konica Corp Developing device, and color image forming device mounting the same
EP0939349A2 (en) * 1998-02-26 1999-09-01 Sharp Kabushiki Kaisha Developing apparatus using one-component toner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987454A (en) * 1988-06-17 1991-01-22 Minolta Camera Kabushiki Kaisha Developing method for developing electrostatic latent image
JPH05188765A (en) * 1992-01-16 1993-07-30 Toshiba Corp Developing device
US5477006A (en) * 1992-05-29 1995-12-19 Kabushiki Kaisha Toshiba Developing device having developing roller and conductive member
US5387967A (en) * 1993-09-23 1995-02-07 Xerox Corporation Single-component electrophotographic development system
JPH09311542A (en) * 1996-05-22 1997-12-02 Konica Corp Developing device, and color image forming device mounting the same
EP0939349A2 (en) * 1998-02-26 1999-09-01 Sharp Kabushiki Kaisha Developing apparatus using one-component toner

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 611 (P - 1641) 10 November 1993 (1993-11-10) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 04 31 March 1998 (1998-03-31) *

Also Published As

Publication number Publication date
EP0967528B1 (en) 2003-09-03
DE69910907T2 (en) 2004-07-22
CN1246663A (en) 2000-03-08
DE69910907D1 (en) 2003-10-09
JP2000010404A (en) 2000-01-14
EP0967528A2 (en) 1999-12-29
CN1120388C (en) 2003-09-03

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