JPS57139757A - Double-color electrophotographing method - Google Patents

Double-color electrophotographing method

Info

Publication number
JPS57139757A
JPS57139757A JP56025388A JP2538881A JPS57139757A JP S57139757 A JPS57139757 A JP S57139757A JP 56025388 A JP56025388 A JP 56025388A JP 2538881 A JP2538881 A JP 2538881A JP S57139757 A JPS57139757 A JP S57139757A
Authority
JP
Japan
Prior art keywords
polarity
potential
carried out
full surface
electric 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
JP56025388A
Other languages
Japanese (ja)
Inventor
Koji Miyagi
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP56025388A priority Critical patent/JPS57139757A/en
Priority to EP82300711A priority patent/EP0060621A3/en
Publication of JPS57139757A publication Critical patent/JPS57139757A/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
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/01—Electrographic processes using a charge pattern for multicoloured copies

Abstract

PURPOSE:To cause no fog in the background part when the lines are copied, by setting the polarities of black and red toners to the polarity opposite to the potential of a photoreceptor obtained after a full surface exposure with simultaneous DC electric charging and changing the polarity of the toner attached to the background part to the polarity equal to the potential of the photoreceptor obtained after the full surface exposure. CONSTITUTION:A photoreceptor comprising a substrate 1, a photosensitive layer 2 and an insulated layer 3 is charged with electricity, and an image exposure and the simultaneous electric charging with opposite polarity are carried out via a red color cutting filter. Then the image exposure is carried out via a red color filter. At this moment, the potential is + at a black area B, - at a red area R and about OV at a white area W respectively. The image is then developed with the opposite polarity to receive a full surface exposure and the DC electric charging. Furthermore the AC corona discharge obtained by superposing the DC voltage of the same polarity as the potentials at the ares B and R, and the transcription is carried out. In such a way, a high-quality picture free from the toner transcription at each non-picture part is obtained.
JP56025388A 1981-02-25 1981-02-25 Double-color electrophotographing method Pending JPS57139757A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56025388A JPS57139757A (en) 1981-02-25 1981-02-25 Double-color electrophotographing method
EP82300711A EP0060621A3 (en) 1981-02-25 1982-02-12 Electrophotographic printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56025388A JPS57139757A (en) 1981-02-25 1981-02-25 Double-color electrophotographing method

Publications (1)

Publication Number Publication Date
JPS57139757A true JPS57139757A (en) 1982-08-28

Family

ID=12164485

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56025388A Pending JPS57139757A (en) 1981-02-25 1981-02-25 Double-color electrophotographing method

Country Status (1)

Country Link
JP (1) JPS57139757A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53143229A (en) * 1977-05-19 1978-12-13 Toshiba Corp Image forming method
JPS5528073A (en) * 1978-08-21 1980-02-28 Ricoh Co Ltd Transfer method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53143229A (en) * 1977-05-19 1978-12-13 Toshiba Corp Image forming method
JPS5528073A (en) * 1978-08-21 1980-02-28 Ricoh Co Ltd Transfer method

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