JPS5772157A - Electrostatic charger - Google Patents

Electrostatic charger

Info

Publication number
JPS5772157A
JPS5772157A JP14791980A JP14791980A JPS5772157A JP S5772157 A JPS5772157 A JP S5772157A JP 14791980 A JP14791980 A JP 14791980A JP 14791980 A JP14791980 A JP 14791980A JP S5772157 A JPS5772157 A JP S5772157A
Authority
JP
Japan
Prior art keywords
photoreceptor
contactor
electrode
electrostatically charged
electrostatic charger
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
JP14791980A
Other languages
Japanese (ja)
Other versions
JPS6318189B2 (en
Inventor
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 JP14791980A priority Critical patent/JPS5772157A/en
Publication of JPS5772157A publication Critical patent/JPS5772157A/en
Publication of JPS6318189B2 publication Critical patent/JPS6318189B2/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

PURPOSE:To decrease electrical damages of a photoreceptor and prolong its life by making the resistance value of a contactor of an electrostatic charger large on the side contacting the body to be electrostatically charged first and small on the opposite side. CONSTITUTION:A contactor 28 and an electrode 29 are mounted on the front part of an electrostatic charger base 24 successively from the front surface thereof, that is, the side in contact with a photoreceptor 4. The contactor 28 is bisected to a front stage 28a and a rear stage 28b in the rotating direction of the photoreceptor 4, and has a regulated resistance value. The electrode 29 is constituted of conductive rubber, to which an AC power source 32 and a DC power source 33 are respectively connected. When AC voltage and DC voltage are applied from the electrode 29 in accordance with the rotation of the photoreceptor 4, the peak of the inflow current to the body to be electrostatically charged decreases because the front stage 28a of the contactor 28 is set larger in contactor resistance than the rear stage 28b. With such constitution, the electrical damages of the photoreceptor as the body to be electrostatically charged are decreased and the life of the photoreceptor is prolonged.
JP14791980A 1980-10-22 1980-10-22 Electrostatic charger Granted JPS5772157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14791980A JPS5772157A (en) 1980-10-22 1980-10-22 Electrostatic charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14791980A JPS5772157A (en) 1980-10-22 1980-10-22 Electrostatic charger

Publications (2)

Publication Number Publication Date
JPS5772157A true JPS5772157A (en) 1982-05-06
JPS6318189B2 JPS6318189B2 (en) 1988-04-18

Family

ID=15441055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14791980A Granted JPS5772157A (en) 1980-10-22 1980-10-22 Electrostatic charger

Country Status (1)

Country Link
JP (1) JPS5772157A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0308185A2 (en) * 1987-09-14 1989-03-22 Canon Kabushiki Kaisha A charging device
JPH07281503A (en) * 1994-04-11 1995-10-27 Nec Corp Brush type electrostatic charger

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4637U (en) * 1970-01-16 1971-09-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4637U (en) * 1970-01-16 1971-09-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0308185A2 (en) * 1987-09-14 1989-03-22 Canon Kabushiki Kaisha A charging device
US5126913A (en) * 1987-09-14 1992-06-30 Canon Kabushiki Kaisha Charging device with contactable charging means and an image forming apparatus having the charging means and a detachable process unit
JPH07281503A (en) * 1994-04-11 1995-10-27 Nec Corp Brush type electrostatic charger

Also Published As

Publication number Publication date
JPS6318189B2 (en) 1988-04-18

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