JPS56113159A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS56113159A
JPS56113159A JP1576980A JP1576980A JPS56113159A JP S56113159 A JPS56113159 A JP S56113159A JP 1576980 A JP1576980 A JP 1576980A JP 1576980 A JP1576980 A JP 1576980A JP S56113159 A JPS56113159 A JP S56113159A
Authority
JP
Japan
Prior art keywords
photoreceptor
coronas
originals
images
corona discharger
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
JP1576980A
Other languages
Japanese (ja)
Inventor
Hiroaki Tsuchiya
Ikuo Soma
Shinichi Iwasaki
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 JP1576980A priority Critical patent/JPS56113159A/en
Publication of JPS56113159A publication Critical patent/JPS56113159A/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

Abstract

PURPOSE:To obtain sharp images of high quality rapidly at all times by changing the quantity of the coronas applied upon a photoreceptor according to the kinds of originals thereby changing the potential curve of the latent images from a black color original which is a reference up to a white color original. CONSTITUTION:At the time of forming latent images on a photoreceptor 1 by exposing images thereto by the DC coronas from the 1st corona discharger 2 and the AC coronas from the 2nd corona discharger 3 then irradiating the entire surface with a lamp 4, a potential sensor 10 is provided on the lower stream of the corona discharger 3, and the latent image potential of the photoreceptor 1 in the state that the original exposure lamp is held put out and the latent image potential corresponding to the white color original are measured. These measured values are fed back to a control part 11 and the currents to be applied to the dischargers 2, 3 are thereby changed in order to form the latent images based on the preset potential curve depending upon the kinds of the originals on the photoreceptor 1. In this way, the originals having varying densities or having colors on the background to make photographic fog easy to occur are copied always sharply despite the change in environmental atmosphere or the change in the photosensitive characteristics of the photoreceptor 1.
JP1576980A 1980-02-12 1980-02-12 Electrophotographic method Pending JPS56113159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1576980A JPS56113159A (en) 1980-02-12 1980-02-12 Electrophotographic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1576980A JPS56113159A (en) 1980-02-12 1980-02-12 Electrophotographic method

Publications (1)

Publication Number Publication Date
JPS56113159A true JPS56113159A (en) 1981-09-05

Family

ID=11897999

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1576980A Pending JPS56113159A (en) 1980-02-12 1980-02-12 Electrophotographic method

Country Status (1)

Country Link
JP (1) JPS56113159A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58217950A (en) * 1982-06-14 1983-12-19 Matsushita Electric Ind Co Ltd Copying machine
JPS59135482A (en) * 1983-01-22 1984-08-03 Canon Inc Image forming device
JPS62265678A (en) * 1986-05-14 1987-11-18 Konika Corp Image forming device capable of varying output of high voltage power supply

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58217950A (en) * 1982-06-14 1983-12-19 Matsushita Electric Ind Co Ltd Copying machine
JPS59135482A (en) * 1983-01-22 1984-08-03 Canon Inc Image forming device
JPS62265678A (en) * 1986-05-14 1987-11-18 Konika Corp Image forming device capable of varying output of high voltage power supply

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