JPS57201262A - Ac corona generating circuit - Google Patents

Ac corona generating circuit

Info

Publication number
JPS57201262A
JPS57201262A JP8614281A JP8614281A JPS57201262A JP S57201262 A JPS57201262 A JP S57201262A JP 8614281 A JP8614281 A JP 8614281A JP 8614281 A JP8614281 A JP 8614281A JP S57201262 A JPS57201262 A JP S57201262A
Authority
JP
Japan
Prior art keywords
generating circuit
corona discharge
discharge current
corona
components
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
JP8614281A
Other languages
Japanese (ja)
Other versions
JPH0338591B2 (en
Inventor
Koji Suzuki
Koki Kuroda
Joji Nagahira
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
Priority to JP8614281A priority Critical patent/JPS57201262A/en
Publication of JPS57201262A publication Critical patent/JPS57201262A/en
Publication of JPH0338591B2 publication Critical patent/JPH0338591B2/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
    • G03G15/0266—Arrangements for controlling the amount of charge
    • 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
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To maintain positive and negative component differences of corona discharge current with high accuracy by controlling the output of a DC high voltage generating circuit through a constant current circuit according to the DC components of the corona discharge current. CONSTITUTION:The DC components of the corona discharge current (i) through a corona discharger 6, a photoreceptor 7, the ground, etc. is detected by a resistor R4, and according to said DC components, a constant current circuit 5 is controlled, and an oscillator 3 of a DC high voltage generating circuit is feedback controlled. A bias voltage of a reverse polarity is held applied to the output side of the high voltage generating circuit via an equivalent electric power source consisting of a coil 2S2, a diode D1, a capacitor C2, a resistor R3, etc. so that the positive and negative component differences of the corona discharge current applied upon the discharger 6 are maintained constant with high accuracy through an AC corona current generator. Therefore, the destaticization and electrostatic separation of an electrophotographic copier are accomplished stably.
JP8614281A 1981-06-04 1981-06-04 Ac corona generating circuit Granted JPS57201262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8614281A JPS57201262A (en) 1981-06-04 1981-06-04 Ac corona generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8614281A JPS57201262A (en) 1981-06-04 1981-06-04 Ac corona generating circuit

Publications (2)

Publication Number Publication Date
JPS57201262A true JPS57201262A (en) 1982-12-09
JPH0338591B2 JPH0338591B2 (en) 1991-06-11

Family

ID=13878470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8614281A Granted JPS57201262A (en) 1981-06-04 1981-06-04 Ac corona generating circuit

Country Status (1)

Country Link
JP (1) JPS57201262A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4607320A (en) * 1983-01-26 1986-08-19 Canon Kabushiki Kaisha Power supply device having a switched primary power supply and control means for maintaining a constant off period and a variable on period
JPS6384146U (en) * 1986-11-21 1988-06-02

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4937536A (en) * 1972-08-08 1974-04-08
JPS5242219A (en) * 1975-09-26 1977-04-01 Xerox Corp High voltage ac power source providing with variable dc bias power source
JPS5394931A (en) * 1977-01-28 1978-08-19 Ricoh Co Ltd Charging method
JPS5511256A (en) * 1978-07-11 1980-01-26 Yahata Denki Seisakusho:Kk Corona discharger-charger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4937536A (en) * 1972-08-08 1974-04-08
JPS5242219A (en) * 1975-09-26 1977-04-01 Xerox Corp High voltage ac power source providing with variable dc bias power source
JPS5394931A (en) * 1977-01-28 1978-08-19 Ricoh Co Ltd Charging method
JPS5511256A (en) * 1978-07-11 1980-01-26 Yahata Denki Seisakusho:Kk Corona discharger-charger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4607320A (en) * 1983-01-26 1986-08-19 Canon Kabushiki Kaisha Power supply device having a switched primary power supply and control means for maintaining a constant off period and a variable on period
JPS6384146U (en) * 1986-11-21 1988-06-02

Also Published As

Publication number Publication date
JPH0338591B2 (en) 1991-06-11

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