JPS56104351A - Charging device of electrophotographic copier - Google Patents

Charging device of electrophotographic copier

Info

Publication number
JPS56104351A
JPS56104351A JP751280A JP751280A JPS56104351A JP S56104351 A JPS56104351 A JP S56104351A JP 751280 A JP751280 A JP 751280A JP 751280 A JP751280 A JP 751280A JP S56104351 A JPS56104351 A JP S56104351A
Authority
JP
Japan
Prior art keywords
photoreceptor
belt
charging
contact
resistivity
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
JP751280A
Other languages
Japanese (ja)
Other versions
JPS6252866B2 (en
Inventor
Takeshi Ueno
Hideo Mukai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP751280A priority Critical patent/JPS56104351A/en
Priority to DE3101678A priority patent/DE3101678C2/en
Priority to US06/227,779 priority patent/US4380384A/en
Publication of JPS56104351A publication Critical patent/JPS56104351A/en
Publication of JPS6252866B2 publication Critical patent/JPS6252866B2/ja
Granted 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

Abstract

PURPOSE:To obtain uniform charging characteristics continuously and improve safety by allowing a charging belt having resistivity to contact a photoreceptor in a manner as to differ in peripheral speed from this and applying voltage thereto from a power feed means thereby providing a potential gradient. CONSTITUTION:This consists of a charging belt 22 which is put on the 1st and 2nd rollers 20, 21, a driving mechanism 23 which runs this belt endless, and a power feed means 24. The belt 22 which has conductivity and of which the resistivity is, for example, 10<4>-10<10>OMEGAcm is used. In a charging device 11, the driving mechanism 23 operates along with the rotation of a photoreceptor 4, and rotates the 1st, 2nd rollers 20, 21 in the direction opposite to that of the photoreceptor 4, and at a peripheral speed slightly slower than this. Hence, the belt 22 runs endless and makes frictional contact with the peripheral wall of the photoreceptor 4, thereby enabling uniform contact to be achieved. In this way, damages of the photoreceptor are eliminate and continuous charging can be performed securely and uniformly.
JP751280A 1980-01-25 1980-01-25 Charging device of electrophotographic copier Granted JPS56104351A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP751280A JPS56104351A (en) 1980-01-25 1980-01-25 Charging device of electrophotographic copier
DE3101678A DE3101678C2 (en) 1980-01-25 1981-01-20 Means for uniformly charging an electrophotographic recording material continuously moved through a charging zone
US06/227,779 US4380384A (en) 1980-01-25 1981-01-23 Charging device for electronic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP751280A JPS56104351A (en) 1980-01-25 1980-01-25 Charging device of electrophotographic copier

Publications (2)

Publication Number Publication Date
JPS56104351A true JPS56104351A (en) 1981-08-20
JPS6252866B2 JPS6252866B2 (en) 1987-11-07

Family

ID=11667829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP751280A Granted JPS56104351A (en) 1980-01-25 1980-01-25 Charging device of electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS56104351A (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008706A (en) * 1988-10-31 1991-04-16 Canon Kabushiki Kaisha Electrophotographic apparatus
US5089851A (en) * 1988-02-19 1992-02-18 Canon Kabushiki Kaisha Charging member
US5305177A (en) * 1990-11-02 1994-04-19 Canon Kabushiki Kaisha Charging device and image forming apparatus
US5405725A (en) * 1991-10-08 1995-04-11 Fuji Electric Co., Ltd. Photoconductor for electrophotography
US5459558A (en) * 1990-05-21 1995-10-17 Canon Kabushiki Kaisha Charging device, image forming apparatus with same and a process unit detachably mountable to the image forming apparatus
US5471285A (en) * 1993-04-16 1995-11-28 Bando Chemical Industries, Ltd. Charging member having a surface layer formed of moisture-permeable synthetic resin material and charging device including the same
EP0690352A2 (en) 1994-06-22 1996-01-03 Canon Kabushiki Kaisha Electrophotographic apparatus
US5669047A (en) * 1989-03-03 1997-09-16 Canon Kabushiki Kaisha Charging member, electrophotographic apparatus and charging method using the same
US5750302A (en) * 1996-03-22 1998-05-12 Canon Kabushiki Kaisha Magnetic toner for developing electrostatic image, image forming process, and process cartridge
US5875375A (en) * 1996-11-12 1999-02-23 Canon Kabushiki Kaisha Electrophotographic apparatus and process cartridge
US6026260A (en) * 1997-10-21 2000-02-15 Canon Kabushiki Kaisha Electrophotographic apparatus, image forming method and process cartridge
US6118964A (en) * 1997-12-10 2000-09-12 Ricoh Company, Ltd. Multi-functional contact-type charging unit and image transfer unit
US6214509B1 (en) 1998-05-13 2001-04-10 Canon Kabushiki Kaisha Toner and image forming method
US6245473B1 (en) 1993-07-30 2001-06-12 Canon Kabushiki Kaisha Electrophotographic apparatus with DC contact charging and photosensitive layer with polycarbonate resin in charge generation layer
US6285848B1 (en) 1997-06-13 2001-09-04 Canon Kabushiki Kaisha Electrophotographic apparatus, image forming method, and process cartridge for developing an image with toner containing an external additive
US6324365B1 (en) 1996-05-30 2001-11-27 Canon Kabushiki Kaisha Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus employing the same
US6434351B2 (en) 1996-05-30 2002-08-13 Canon Kabushiki Kaisha Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus employing the same
US6447969B1 (en) 1999-06-02 2002-09-10 Canon Kabushiki Kaisha Toner and image forming method
US6541172B2 (en) 2000-09-29 2003-04-01 Canon Kabushiki Kaisha Electrophotographic photosensitive member, electrophotographic apparatus and process cartridge
US6697591B2 (en) 2001-06-21 2004-02-24 Canon Kabushiki Kaisha Electrophotographic apparatus and process cartridge
US8086141B2 (en) 2006-03-29 2011-12-27 Ricoh Company, Ltd. Electric charging apparatus and image forming apparatus using the same
US9201332B2 (en) 2013-07-12 2015-12-01 Ricoh Company, Ltd. Charger, ion generator, image forming apparatus, and process cartridge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0737111Y2 (en) * 1989-10-09 1995-08-23 富士電機株式会社 Open showcase control device protection structure

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5089851A (en) * 1988-02-19 1992-02-18 Canon Kabushiki Kaisha Charging member
US5008706A (en) * 1988-10-31 1991-04-16 Canon Kabushiki Kaisha Electrophotographic apparatus
US5669047A (en) * 1989-03-03 1997-09-16 Canon Kabushiki Kaisha Charging member, electrophotographic apparatus and charging method using the same
US5459558A (en) * 1990-05-21 1995-10-17 Canon Kabushiki Kaisha Charging device, image forming apparatus with same and a process unit detachably mountable to the image forming apparatus
US5305177A (en) * 1990-11-02 1994-04-19 Canon Kabushiki Kaisha Charging device and image forming apparatus
EP0536692B2 (en) † 1991-10-08 2005-06-29 Fuji Electric Co., Ltd. Use of a photoconductor in an electrophotographic apparatus employing contact charging
US5405725A (en) * 1991-10-08 1995-04-11 Fuji Electric Co., Ltd. Photoconductor for electrophotography
US5471285A (en) * 1993-04-16 1995-11-28 Bando Chemical Industries, Ltd. Charging member having a surface layer formed of moisture-permeable synthetic resin material and charging device including the same
US6245473B1 (en) 1993-07-30 2001-06-12 Canon Kabushiki Kaisha Electrophotographic apparatus with DC contact charging and photosensitive layer with polycarbonate resin in charge generation layer
EP0690352A2 (en) 1994-06-22 1996-01-03 Canon Kabushiki Kaisha Electrophotographic apparatus
US5923925A (en) * 1994-06-22 1999-07-13 Canon Kabushiki Kaisha Electrophotographic apparatus
US5750302A (en) * 1996-03-22 1998-05-12 Canon Kabushiki Kaisha Magnetic toner for developing electrostatic image, image forming process, and process cartridge
US6434351B2 (en) 1996-05-30 2002-08-13 Canon Kabushiki Kaisha Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus employing the same
US6324365B1 (en) 1996-05-30 2001-11-27 Canon Kabushiki Kaisha Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus employing the same
US5875375A (en) * 1996-11-12 1999-02-23 Canon Kabushiki Kaisha Electrophotographic apparatus and process cartridge
US6285848B1 (en) 1997-06-13 2001-09-04 Canon Kabushiki Kaisha Electrophotographic apparatus, image forming method, and process cartridge for developing an image with toner containing an external additive
US6026260A (en) * 1997-10-21 2000-02-15 Canon Kabushiki Kaisha Electrophotographic apparatus, image forming method and process cartridge
US6118964A (en) * 1997-12-10 2000-09-12 Ricoh Company, Ltd. Multi-functional contact-type charging unit and image transfer unit
US6214509B1 (en) 1998-05-13 2001-04-10 Canon Kabushiki Kaisha Toner and image forming method
US6447969B1 (en) 1999-06-02 2002-09-10 Canon Kabushiki Kaisha Toner and image forming method
US6541172B2 (en) 2000-09-29 2003-04-01 Canon Kabushiki Kaisha Electrophotographic photosensitive member, electrophotographic apparatus and process cartridge
US6697591B2 (en) 2001-06-21 2004-02-24 Canon Kabushiki Kaisha Electrophotographic apparatus and process cartridge
US8086141B2 (en) 2006-03-29 2011-12-27 Ricoh Company, Ltd. Electric charging apparatus and image forming apparatus using the same
US9201332B2 (en) 2013-07-12 2015-12-01 Ricoh Company, Ltd. Charger, ion generator, image forming apparatus, and process cartridge

Also Published As

Publication number Publication date
JPS6252866B2 (en) 1987-11-07

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