JPS57139756A - Two color electrophotographing system - Google Patents

Two color electrophotographing system

Info

Publication number
JPS57139756A
JPS57139756A JP2538781A JP2538781A JPS57139756A JP S57139756 A JPS57139756 A JP S57139756A JP 2538781 A JP2538781 A JP 2538781A JP 2538781 A JP2538781 A JP 2538781A JP S57139756 A JPS57139756 A JP S57139756A
Authority
JP
Japan
Prior art keywords
polarity
red
reverse
photoreceptor
black
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
JP2538781A
Other languages
Japanese (ja)
Inventor
Koji Miyagi
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 JP2538781A priority Critical patent/JPS57139756A/en
Priority claimed from EP82300711A external-priority patent/EP0060621A3/en
Publication of JPS57139756A publication Critical patent/JPS57139756A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00Electrographic processes using a charge pattern
    • G03G13/01Electrographic processes using a charge pattern for multicoloured copies

Abstract

PURPOSE:To form a fog-free 2-color image, by forming electrostatic latent images reverse to each other in polarity corresponding to both the A and B color parts of a 2-color original on a photoreceptor, developing them with different polarity toners, uniformly exposing them, carrying out AC corona discharge superposed by DC components same in polarity as the potentials of the photoreceptor in order to transfer the toner images. CONSTITUTION:A photoreceptor consisting of a substrate 1, a photosensitive layer 2, and an insulating layer 3 is charged, imagewise exposed through a red- cut filter, and simultaneously charged to reverse polarity, imagewise exposed through a red filter, and voltage becomes + on the black part B, - on the red part R, and about 0 volt on the white part W. Then, it is developed with a reverse-polarity toner, uniformly exposed to reverse the latent image on the part B, and subjected to AC corona discharge superposed by DC voltage same in polarity as the black and red potentials, thus permitting fog toner on the nonimage area not to be transferred even in transferring the black and red toners on the image area, and a fog-free image to be obtained.
JP2538781A 1981-02-25 1981-02-25 Two color electrophotographing system Pending JPS57139756A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2538781A JPS57139756A (en) 1981-02-25 1981-02-25 Two color electrophotographing system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2538781A JPS57139756A (en) 1981-02-25 1981-02-25 Two color electrophotographing system
EP82300711A EP0060621A3 (en) 1981-02-25 1982-02-12 Electrophotographic printing

Publications (1)

Publication Number Publication Date
JPS57139756A true JPS57139756A (en) 1982-08-28

Family

ID=12164459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2538781A Pending JPS57139756A (en) 1981-02-25 1981-02-25 Two color electrophotographing system

Country Status (1)

Country Link
JP (1) JPS57139756A (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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