JPS5778555A - Electrophotogaphic method - Google Patents

Electrophotogaphic method

Info

Publication number
JPS5778555A
JPS5778555A JP55153845A JP15384580A JPS5778555A JP S5778555 A JPS5778555 A JP S5778555A JP 55153845 A JP55153845 A JP 55153845A JP 15384580 A JP15384580 A JP 15384580A JP S5778555 A JPS5778555 A JP S5778555A
Authority
JP
Japan
Prior art keywords
developing
reversal
region
uniformly charged
photoreceptor
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
JP55153845A
Other languages
Japanese (ja)
Inventor
Isamu Komatsu
Nobuyoshi Hoshi
Masayasu Anzai
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55153845A priority Critical patent/JPS5778555A/en
Publication of JPS5778555A publication Critical patent/JPS5778555A/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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit
    • G03G15/0126—Details of unit using a solid developer

Abstract

PURPOSE:To prevent sticking of a toner in areas of a photoreceptor where developing is not required by making the developing function of a developing device ineffective when there are uncharged parts in a reversal development region. CONSTITUTION:At the start of operation, a photoreceptor 1 is electrostatically charged uniformly with a corona charger 2. When the uniformly charged area after the formation of latent images with an exposure device 3 comes into the developing region of a reversal developing device 11, the developing device is moved and reversal developing is accomplished. Further, when it is desired to form images of two colors, the unexposed region where the uniformly charged charge remains is subjected to the 2nd image exposure 5 and is formed with a latent image, after which it is developed with the 2nd developing device 12. While the uniformly charged area is in a developing region after passage of the latent image part through the 1st and 2nd reversal developing regions, the developing devices are retreated. It is equally well to scrap off the developer on the developing rolls with scrape plates to prohibit developing in place of moving the above-mentioned developing devices.
JP55153845A 1980-11-04 1980-11-04 Electrophotogaphic method Pending JPS5778555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55153845A JPS5778555A (en) 1980-11-04 1980-11-04 Electrophotogaphic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55153845A JPS5778555A (en) 1980-11-04 1980-11-04 Electrophotogaphic method

Publications (1)

Publication Number Publication Date
JPS5778555A true JPS5778555A (en) 1982-05-17

Family

ID=15571351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55153845A Pending JPS5778555A (en) 1980-11-04 1980-11-04 Electrophotogaphic method

Country Status (1)

Country Link
JP (1) JPS5778555A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076766A (en) * 1983-10-04 1985-05-01 Konishiroku Photo Ind Co Ltd Recording method of color image
JPS60198562A (en) * 1984-03-22 1985-10-08 Matsushita Electric Ind Co Ltd Color copying device
JPS60198561A (en) * 1984-03-21 1985-10-08 Matsushita Electric Ind Co Ltd Copying device
JPS60200267A (en) * 1984-03-23 1985-10-09 Matsushita Electric Ind Co Ltd Color copying device
JPS60201365A (en) * 1984-03-26 1985-10-11 Matsushita Electric Ind Co Ltd Color copying machine
JPS61118775A (en) * 1984-11-15 1986-06-06 Konishiroku Photo Ind Co Ltd Method and device for image formation
JPS61183669A (en) * 1985-02-08 1986-08-16 Konishiroku Photo Ind Co Ltd Image forming device
JPS61223856A (en) * 1985-03-29 1986-10-04 Konishiroku Photo Ind Co Ltd Multicolored image forming device
JPS61231572A (en) * 1985-04-06 1986-10-15 Canon Inc Image forming device
JPS625277A (en) * 1985-06-29 1987-01-12 Toshiba Corp Developing device
JPS6211880A (en) * 1985-07-09 1987-01-20 Mita Ind Co Ltd Developing device for electrophotography
JPS6227774A (en) * 1985-07-27 1987-02-05 Mita Ind Co Ltd Electrophotographic developing device
JPS62116970A (en) * 1985-11-18 1987-05-28 Canon Inc Image forming device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218332A (en) * 1975-08-04 1977-02-10 Canon Inc Development apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218332A (en) * 1975-08-04 1977-02-10 Canon Inc Development apparatus

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076766A (en) * 1983-10-04 1985-05-01 Konishiroku Photo Ind Co Ltd Recording method of color image
JPH0228865B2 (en) * 1983-10-04 1990-06-26 Konishiroku Photo Ind
JPS60198561A (en) * 1984-03-21 1985-10-08 Matsushita Electric Ind Co Ltd Copying device
JPS60198562A (en) * 1984-03-22 1985-10-08 Matsushita Electric Ind Co Ltd Color copying device
JPS60200267A (en) * 1984-03-23 1985-10-09 Matsushita Electric Ind Co Ltd Color copying device
JPS60201365A (en) * 1984-03-26 1985-10-11 Matsushita Electric Ind Co Ltd Color copying machine
JPH0228866B2 (en) * 1984-11-15 1990-06-26 Konishiroku Photo Ind
JPS61118775A (en) * 1984-11-15 1986-06-06 Konishiroku Photo Ind Co Ltd Method and device for image formation
JPS61183669A (en) * 1985-02-08 1986-08-16 Konishiroku Photo Ind Co Ltd Image forming device
JPH0519704B2 (en) * 1985-02-08 1993-03-17 Konishiroku Photo Ind
JPS61223856A (en) * 1985-03-29 1986-10-04 Konishiroku Photo Ind Co Ltd Multicolored image forming device
JPH0228867B2 (en) * 1985-03-29 1990-06-26 Konishiroku Photo Ind
JPS61231572A (en) * 1985-04-06 1986-10-15 Canon Inc Image forming device
JPS625277A (en) * 1985-06-29 1987-01-12 Toshiba Corp Developing device
JPS6211880A (en) * 1985-07-09 1987-01-20 Mita Ind Co Ltd Developing device for electrophotography
JPS6227774A (en) * 1985-07-27 1987-02-05 Mita Ind Co Ltd Electrophotographic developing device
JPS62116970A (en) * 1985-11-18 1987-05-28 Canon Inc Image forming device

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