JPS56113160A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS56113160A
JPS56113160A JP1577080A JP1577080A JPS56113160A JP S56113160 A JPS56113160 A JP S56113160A JP 1577080 A JP1577080 A JP 1577080A JP 1577080 A JP1577080 A JP 1577080A JP S56113160 A JPS56113160 A JP S56113160A
Authority
JP
Japan
Prior art keywords
original
potential
images
originals
kinds
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
JP1577080A
Other languages
Japanese (ja)
Inventor
Hiroaki Tsuchiya
Shinichi Iwasaki
Ikuo Soma
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 JP1577080A priority Critical patent/JPS56113160A/en
Publication of JPS56113160A publication Critical patent/JPS56113160A/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 high-quality images rapidly irrespective of kinds of originals by changing the quantity of corona application to change the potential curve of latent images and at the same time changing exposure and developing bias value by preset values according to the kinds of originals. CONSTITUTION:According to originals of different kinds, such as an ordinary original (a) having dark color images on white-color ground, such an original (b) which has colors on the background of the ordinary original and produces photographic fogs in the copied images, or an original (f) which is thin in image part, coronas are applied to a photoreceptor 1 with a DC corona discharger 2 and an AC corona discharger 3, and after the exposure of the original, latent images are formed by the irradiation over the entire surface with a lamp 4. At this time, the potential is detected with a potential sensor 10 and the exposure and developing bias having been set in relation to the quantity of applied coronas and the potential curve are applied by a control part to the photoreceptor 1 so as to conform to the potential curve of the reference potential of either of the potential for the black color original or the potential for the white color original depending upon the kinds of originals. In this way, always sharp images are made obtainable.
JP1577080A 1980-02-12 1980-02-12 Electrophotographic method Pending JPS56113160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1577080A JPS56113160A (en) 1980-02-12 1980-02-12 Electrophotographic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1577080A JPS56113160A (en) 1980-02-12 1980-02-12 Electrophotographic method

Publications (1)

Publication Number Publication Date
JPS56113160A true JPS56113160A (en) 1981-09-05

Family

ID=11898028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1577080A Pending JPS56113160A (en) 1980-02-12 1980-02-12 Electrophotographic method

Country Status (1)

Country Link
JP (1) JPS56113160A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833266A (en) * 1981-08-22 1983-02-26 Minolta Camera Co Ltd Electrophotographic copying machine
JPS58217950A (en) * 1982-06-14 1983-12-19 Matsushita Electric Ind Co Ltd Copying machine
JPS60218672A (en) * 1984-04-16 1985-11-01 Ricoh Co Ltd Copying device
JPS60249166A (en) * 1984-05-24 1985-12-09 Canon Inc Method for adjusting image density of electrophotograph
JPS60263172A (en) * 1984-06-11 1985-12-26 Sharp Corp Image correcting method of copying machine
JPH01280775A (en) * 1988-05-06 1989-11-10 Sharp Corp Method for setting picture formation processing condition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833266A (en) * 1981-08-22 1983-02-26 Minolta Camera Co Ltd Electrophotographic copying machine
JPS58217950A (en) * 1982-06-14 1983-12-19 Matsushita Electric Ind Co Ltd Copying machine
JPS60218672A (en) * 1984-04-16 1985-11-01 Ricoh Co Ltd Copying device
JPS60249166A (en) * 1984-05-24 1985-12-09 Canon Inc Method for adjusting image density of electrophotograph
JPS60263172A (en) * 1984-06-11 1985-12-26 Sharp Corp Image correcting method of copying machine
JPH01280775A (en) * 1988-05-06 1989-11-10 Sharp Corp Method for setting picture formation processing condition

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