JPS5793378A - Electrophotographic copier - Google Patents

Electrophotographic copier

Info

Publication number
JPS5793378A
JPS5793378A JP55170055A JP17005580A JPS5793378A JP S5793378 A JPS5793378 A JP S5793378A JP 55170055 A JP55170055 A JP 55170055A JP 17005580 A JP17005580 A JP 17005580A JP S5793378 A JPS5793378 A JP S5793378A
Authority
JP
Japan
Prior art keywords
discharger
region
charger
potential
point
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.)
Pending
Application number
JP55170055A
Other languages
Japanese (ja)
Inventor
Isoji Nakamura
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 JP55170055A priority Critical patent/JPS5793378A/en
Publication of JPS5793378A publication Critical patent/JPS5793378A/en
Pending 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
    • G03G15/0291—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)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To maintain surface potential in a uniform state over the entire circumference of a photoreceptor by stopping the operation of chargers other than a secondary corona discharger upon ending of an ordinary copying process and changing over the discharging conditions of the secondary corona discharger. CONSTITUTION:A predestaticizer 13, a primary charger 2, a secondary corona discharger 3, and a transfer charger 6 are disposed to a photoreceptor 1. After the point of the time t1 when the copying process ends, the charger 6 and the destaticizer 13 are stopped, and the discharging of the charger 2 and the discharger 3 are continued. When the charger 2 is stopped at the point of the time t2 when the region (c) passes the charger 2, the potential of the region (d) can be dropped down to the potential of the region (a). Next, at the point of the time t3 when the trailing end of the region (c) enters the range of the discharger 3, the discharger 3 is changed over to weak discharging, and when the discharger 3 is stopped at the point of the time t4 wnen the trailing end of the region (b) enters the range of the discharger 3, the potentials of the regions (c) and (b) can be dropped down to the potential of the region (a). Thereby, the entire circumferential surface of the photoreceptor is maintained at the uniform potential.
JP55170055A 1980-12-02 1980-12-02 Electrophotographic copier Pending JPS5793378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55170055A JPS5793378A (en) 1980-12-02 1980-12-02 Electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55170055A JPS5793378A (en) 1980-12-02 1980-12-02 Electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS5793378A true JPS5793378A (en) 1982-06-10

Family

ID=15897780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55170055A Pending JPS5793378A (en) 1980-12-02 1980-12-02 Electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5793378A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62174779A (en) * 1986-01-28 1987-07-31 Konishiroku Photo Ind Co Ltd Electrostatic recording device
JPS63169683A (en) * 1987-01-07 1988-07-13 Sanyo Electric Co Ltd Electrostatic recorder
JPS63169684A (en) * 1987-01-07 1988-07-13 Sanyo Electric Co Ltd Electrostatic recorder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62174779A (en) * 1986-01-28 1987-07-31 Konishiroku Photo Ind Co Ltd Electrostatic recording device
JPS63169683A (en) * 1987-01-07 1988-07-13 Sanyo Electric Co Ltd Electrostatic recorder
JPS63169684A (en) * 1987-01-07 1988-07-13 Sanyo Electric Co Ltd Electrostatic recorder

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