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JPS56140370A - Formation of electrostatic latent image - Google Patents

Formation of electrostatic latent image

Info

Publication number
JPS56140370A
JPS56140370A JP4317980A JP4317980A JPS56140370A JP S56140370 A JPS56140370 A JP S56140370A JP 4317980 A JP4317980 A JP 4317980A JP 4317980 A JP4317980 A JP 4317980A JP S56140370 A JPS56140370 A JP S56140370A
Authority
JP
Japan
Prior art keywords
time
photoreceptor
passes
corona discharger
charging
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
JP4317980A
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 JP4317980A priority Critical patent/JPS56140370A/en
Publication of JPS56140370A publication Critical patent/JPS56140370A/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
    • G03G15/0266—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)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To eliminate time delay, production of noise and need for any destaticizing light source and make the apparatus simple by changing over the discharge conditions of a corona discharger for charging between the time when the image region of a photoreceptor passes and the time when the nonimage area passes. CONSTITUTION:The three-layer constitution photoreceptor provided on the surface of a photosensitive drum 1 is uniformly charged to 1,500V by a primary charger 2, thence an electrostatic latent image is formed on the surface insulation layer of the photoreceptor by irradiating the original image simultaneously with charging by a DC corona discharger 3 impressed with -7.5kV. Next, according to the brightness and darkness of the original image, a difference in surface potential is produced by a full surface exposure lamp 4, so that the electrostatic latent image of high contrast is formed. Thence, it is corona-transferred onto transfer paper by a corona discharger 7. The discharge conditions of the corona discharger 3 for charging are changed over between the time when the image region of the photoreceptor passes and the time when the nonimage region passes, whereby the need for any destaticizing light source is eliminated and the apparatus is made simple.
JP4317980A 1980-04-02 1980-04-02 Formation of electrostatic latent image Pending JPS56140370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4317980A JPS56140370A (en) 1980-04-02 1980-04-02 Formation of electrostatic latent image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4317980A JPS56140370A (en) 1980-04-02 1980-04-02 Formation of electrostatic latent image

Publications (1)

Publication Number Publication Date
JPS56140370A true JPS56140370A (en) 1981-11-02

Family

ID=12656655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4317980A Pending JPS56140370A (en) 1980-04-02 1980-04-02 Formation of electrostatic latent image

Country Status (1)

Country Link
JP (1) JPS56140370A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010266A (en) * 1983-06-30 1985-01-19 Mita Ind Co Ltd Electrophotographing method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54161342A (en) * 1974-08-29 1979-12-20 Xerox Corp Electrophotographic copying machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54161342A (en) * 1974-08-29 1979-12-20 Xerox Corp Electrophotographic copying machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010266A (en) * 1983-06-30 1985-01-19 Mita Ind Co Ltd Electrophotographing method

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