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EP0810486A3 - Charging roller for an image forming apparatus - Google Patents

Charging roller for an image forming apparatus Download PDF

Info

Publication number
EP0810486A3
EP0810486A3 EP97107365A EP97107365A EP0810486A3 EP 0810486 A3 EP0810486 A3 EP 0810486A3 EP 97107365 A EP97107365 A EP 97107365A EP 97107365 A EP97107365 A EP 97107365A EP 0810486 A3 EP0810486 A3 EP 0810486A3
Authority
EP
European Patent Office
Prior art keywords
forming apparatus
image forming
charging roller
surface layer
elastic layer
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
EP97107365A
Other languages
German (de)
French (fr)
Other versions
EP0810486B1 (en
EP0810486A2 (en
Inventor
Kazuo Nojima
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
Publication of EP0810486A2 publication Critical patent/EP0810486A2/en
Publication of EP0810486A3 publication Critical patent/EP0810486A3/en
Application granted granted Critical
Publication of EP0810486B1 publication Critical patent/EP0810486B1/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
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
    • G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
    • G03G15/0233—Structure, details of the charging member, e.g. chemical composition, surface properties

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

In a charging device included in an image forming apparatus for charging an image carrier uniformly, a charge roller (2) has an elastic layer (5) and a surface layer (6). The elastic layer (5) is made of a substance having a medium electric resistance and having no conductive particles dispersed therein. The surface layer (6) is made of a mixture of epichlorohydrin rubber and a non-adhering fluorine-based resin.
EP97107365A 1993-01-13 1994-01-13 Charging roller for an image forming apparatus Expired - Lifetime EP0810486B1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP367593 1993-01-13
JP3675/93 1993-01-13
JP367593 1993-01-13
JP27059093 1993-10-28
JP27059093A JPH06266206A (en) 1993-01-13 1993-10-28 Charging roller
JP270590/93 1993-10-28
EP19940100436 EP0606907B1 (en) 1993-01-13 1994-01-13 Charging roller for an image forming apparatus

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP94100436.8 Division 1994-01-13
EP19940100436 Division EP0606907B1 (en) 1993-01-13 1994-01-13 Charging roller for an image forming apparatus

Publications (3)

Publication Number Publication Date
EP0810486A2 EP0810486A2 (en) 1997-12-03
EP0810486A3 true EP0810486A3 (en) 1998-04-15
EP0810486B1 EP0810486B1 (en) 2003-12-17

Family

ID=26337309

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97107365A Expired - Lifetime EP0810486B1 (en) 1993-01-13 1994-01-13 Charging roller for an image forming apparatus
EP19940100436 Expired - Lifetime EP0606907B1 (en) 1993-01-13 1994-01-13 Charging roller for an image forming apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19940100436 Expired - Lifetime EP0606907B1 (en) 1993-01-13 1994-01-13 Charging roller for an image forming apparatus

Country Status (4)

Country Link
EP (2) EP0810486B1 (en)
JP (1) JPH06266206A (en)
DE (2) DE69417931T2 (en)
ES (2) ES2131593T3 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5610795A (en) * 1994-08-01 1997-03-11 Xerox Corporation Self biasing charging member
EP0708382B1 (en) * 1994-10-18 2002-01-30 Canon Kabushiki Kaisha Process for remanufacturing a charging member
JP3346970B2 (en) * 1994-11-22 2002-11-18 日本ゼオン株式会社 Rubber roll, rubber composition, and image forming apparatus
US5625858A (en) * 1995-01-18 1997-04-29 Canon Kabushiki Kaisha Contact charging member, process for producing same and electrophotographic apparatus using same
JP3028057B2 (en) * 1996-02-21 2000-04-04 富士ゼロックス株式会社 Charging member
US5849399A (en) * 1996-04-19 1998-12-15 Xerox Corporation Bias transfer members with fluorinated carbon filled fluoroelastomer outer layer
US6141516A (en) * 1996-06-28 2000-10-31 Xerox Corporation Fluorinated carbon filled fluoroelastomer outer layer
JP3598718B2 (en) * 1997-03-25 2004-12-08 東海ゴム工業株式会社 Semiconductive roll
US6558781B1 (en) 1999-07-12 2003-05-06 Canon Kabushiki Kaisha Conductive roller, process cartridge and image forming apparatus
US6203855B1 (en) 1999-08-13 2001-03-20 Xerox Corporation Process for preparing nonbleeding fluorinated carbon and zinc oxide filler layer for bias charging member
US6620476B2 (en) 1999-08-13 2003-09-16 Xerox Corporation Nonbleeding fluorinated carbon and zinc oxide filled layer for bias charging member
EP1156388A1 (en) 2000-05-16 2001-11-21 Hokushin Corporation Charge-imparting member
US8483591B2 (en) 2009-08-27 2013-07-09 Xerox Corporation Bias charging overcoat
JP5471176B2 (en) * 2009-08-28 2014-04-16 富士ゼロックス株式会社 Composition for conductive roller, conductive roller, charging device, image forming apparatus and process cartridge, and method for manufacturing conductive roller
US8768219B2 (en) 2009-11-20 2014-07-01 Xerox Corporation Bias charging overcoat
US8649704B2 (en) 2009-11-20 2014-02-11 Xerox Corporation Bias charging overcoat
US9442451B2 (en) 2014-11-28 2016-09-13 Canon Kabushiki Kaisha Electroconductive member for electrophotography, process cartridge, and electrophotographic image-forming apparatus
US10416588B2 (en) 2016-10-31 2019-09-17 Canon Kabushiki Kaisha Charging member, process cartridge, electrophotographic image forming apparatus, and method for manufacturing charging member

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406834A2 (en) * 1989-07-05 1991-01-09 Canon Kabushiki Kaisha Charging member and electrophotographic apparatus using the same
EP0417801A2 (en) * 1989-09-14 1991-03-20 Canon Kabushiki Kaisha Image forming apparatus having charging means
JPH0477760A (en) * 1990-07-20 1992-03-11 Canon Inc Electrifying member
JPH04299355A (en) * 1991-03-28 1992-10-22 Canon Inc Member for electrification
JPH04311972A (en) * 1991-04-10 1992-11-04 Ricoh Co Ltd Semiconducting roller

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727453A (en) * 1986-12-22 1988-02-23 Xerox Corporation Alternating current inductive charging of a photoreceptor
US5270768A (en) * 1991-04-24 1993-12-14 Canon Kabushiki Kaisha Charging member containing reduced titanium oxide and device using same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406834A2 (en) * 1989-07-05 1991-01-09 Canon Kabushiki Kaisha Charging member and electrophotographic apparatus using the same
EP0417801A2 (en) * 1989-09-14 1991-03-20 Canon Kabushiki Kaisha Image forming apparatus having charging means
JPH0477760A (en) * 1990-07-20 1992-03-11 Canon Inc Electrifying member
JPH04299355A (en) * 1991-03-28 1992-10-22 Canon Inc Member for electrification
JPH04311972A (en) * 1991-04-10 1992-11-04 Ricoh Co Ltd Semiconducting roller

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 9251, Derwent World Patents Index; Class A89, AN 92-418341, XP002055371 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 292 (P - 1377) 29 June 1992 (1992-06-29) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 112 (P - 1498) 8 March 1993 (1993-03-08) *

Also Published As

Publication number Publication date
DE69417931D1 (en) 1999-05-27
EP0606907B1 (en) 1999-04-21
EP0606907A1 (en) 1994-07-20
EP0810486B1 (en) 2003-12-17
ES2208783T3 (en) 2004-06-16
ES2131593T3 (en) 1999-08-01
DE69417931T2 (en) 1999-09-16
DE69433430T2 (en) 2004-10-07
DE69433430D1 (en) 2004-01-29
JPH06266206A (en) 1994-09-22
EP0810486A2 (en) 1997-12-03

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