EP2787394A3 - Roller member for electrophotography, process cartridge and electrophotographic apparatus - Google Patents

Roller member for electrophotography, process cartridge and electrophotographic apparatus Download PDF

Info

Publication number
EP2787394A3
EP2787394A3 EP14001240.2A EP14001240A EP2787394A3 EP 2787394 A3 EP2787394 A3 EP 2787394A3 EP 14001240 A EP14001240 A EP 14001240A EP 2787394 A3 EP2787394 A3 EP 2787394A3
Authority
EP
European Patent Office
Prior art keywords
roller member
elastic layer
electrophotography
larger
resin particle
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
EP14001240.2A
Other languages
German (de)
French (fr)
Other versions
EP2787394B1 (en
EP2787394A2 (en
Inventor
Atsushi Uematsu
Noboru Miyagawa
Taichi Sato
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Publication of EP2787394A2 publication Critical patent/EP2787394A2/en
Publication of EP2787394A3 publication Critical patent/EP2787394A3/en
Application granted granted Critical
Publication of EP2787394B1 publication Critical patent/EP2787394B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0818—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the structure of the donor member, e.g. surface properties
    • 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
    • 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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G03G15/162—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support details of the the intermediate support, e.g. chemical composition
    • 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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
    • G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
    • G03G15/1685—Structure, details of the transfer member, e.g. chemical composition
    • 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
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
    • G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof
    • 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
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/206—Structural details or chemical composition of the pressure elements and layers thereof

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Dry Development In Electrophotography (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The roller member has a substrate and an electroconductive elastic layer. The elastic layer has a crown shape of which an outer diameter at the middle in the lengthwise direction is larger than those at its both ends. The elastic layer includes a bowl-shaped resin particle. The surface of the roller member has concavity derived from an opening of the bowl-shaped resin particle and a protrusion derived from an edge of the opening of the resin particle. The relation in the restoring rate for elastic deformation between at the middle of the roller member and at its both ends is such that: on the surface of the elastic layer the restoring rate is larger at both ends than that at the middle, and at the position of depth t µm from the elastic layer surface the restoring rate is larger at the middle than that at both ends.
Figure imgaf001
EP14001240.2A 2013-04-03 2014-04-03 Roller member for electrophotography, process cartridge and electrophotographic apparatus Not-in-force EP2787394B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013077702 2013-04-03

Publications (3)

Publication Number Publication Date
EP2787394A2 EP2787394A2 (en) 2014-10-08
EP2787394A3 true EP2787394A3 (en) 2017-10-04
EP2787394B1 EP2787394B1 (en) 2018-10-03

Family

ID=50423939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14001240.2A Not-in-force EP2787394B1 (en) 2013-04-03 2014-04-03 Roller member for electrophotography, process cartridge and electrophotographic apparatus

Country Status (3)

Country Link
EP (1) EP2787394B1 (en)
JP (1) JP6016838B2 (en)
CN (1) CN104102107B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9599914B2 (en) * 2015-04-03 2017-03-21 Canon Kabushiki Kaisha Electrophotographic member having bow-shaped resin particles defining concavity and protrusion at surface thereof
EP3281064B1 (en) * 2015-04-03 2019-09-25 C/o Canon Kabushiki Kaisha Charging member, process cartridge and electrophotographic apparatus
JP6536379B2 (en) * 2015-11-25 2019-07-03 コニカミノルタ株式会社 Fixing belt, fixing device and image forming apparatus
JP2018049218A (en) * 2016-09-23 2018-03-29 キヤノン株式会社 Process cartridge for electrophotography and electrophotographic image forming apparatus
JP2018205700A (en) * 2017-06-02 2018-12-27 キヤノン株式会社 Electrophotographic roller, process cartridge, and electrophotographic device
US10248042B2 (en) * 2017-06-02 2019-04-02 Canon Kabushiki Kaisha Electrophotographic roller, process cartridge and electrophotographic apparatus
JP6370453B1 (en) * 2017-08-08 2018-08-08 キヤノン株式会社 Electrophotographic member, process cartridge, and electrophotographic image forming apparatus
JP7433805B2 (en) 2018-08-30 2024-02-20 キヤノン株式会社 Developing rollers, process cartridges, and electrophotographic image forming devices
WO2021039203A1 (en) * 2019-08-26 2021-03-04 Nok株式会社 Charging roll
US11644761B2 (en) 2021-06-02 2023-05-09 Canon Kabushiki Kaisha Electrophotographic roller, process cartridge and electrophotographic image forming apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011237470A (en) * 2010-04-30 2011-11-24 Canon Inc Charging member, process cartridge and electrophotographic device
US20110305481A1 (en) * 2010-04-30 2011-12-15 Canon Kabushiki Kaisha Charging member, process cartridge, and electrophotographic apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5173249B2 (en) 2007-05-01 2013-04-03 キヤノン株式会社 Charging member, process cartridge, and electrophotographic image forming apparatus
KR20080110057A (en) * 2007-06-14 2008-12-18 삼성전자주식회사 Developing unit and image forming apparatus employing the same
CN102203683B (en) * 2008-10-31 2014-04-16 佳能株式会社 Charging member, process cartridge, and electrophotographic apparatus
JP5663296B2 (en) * 2010-06-04 2015-02-04 京セラドキュメントソリューションズ株式会社 Image forming apparatus
CN103080850B (en) * 2010-08-20 2015-03-25 佳能株式会社 Charging member

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011237470A (en) * 2010-04-30 2011-11-24 Canon Inc Charging member, process cartridge and electrophotographic device
US20110305481A1 (en) * 2010-04-30 2011-12-15 Canon Kabushiki Kaisha Charging member, process cartridge, and electrophotographic apparatus

Also Published As

Publication number Publication date
EP2787394B1 (en) 2018-10-03
JP6016838B2 (en) 2016-10-26
JP2014211624A (en) 2014-11-13
CN104102107B (en) 2016-03-02
CN104102107A (en) 2014-10-15
EP2787394A2 (en) 2014-10-08

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