JPS5723952A - Bicolor electrophotographic method - Google Patents

Bicolor electrophotographic method

Info

Publication number
JPS5723952A
JPS5723952A JP9751580A JP9751580A JPS5723952A JP S5723952 A JPS5723952 A JP S5723952A JP 9751580 A JP9751580 A JP 9751580A JP 9751580 A JP9751580 A JP 9751580A JP S5723952 A JPS5723952 A JP S5723952A
Authority
JP
Japan
Prior art keywords
toner
photoconductive drum
bicolor
charger
color
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.)
Granted
Application number
JP9751580A
Other languages
Japanese (ja)
Other versions
JPS6354186B2 (en
Inventor
Isamu Komatsu
Nobuyoshi Hoshi
Masayasu Anzai
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 JP55097515A priority Critical patent/JPS6354186B2/ja
Publication of JPS5723952A publication Critical patent/JPS5723952A/en
Publication of JPS6354186B2 publication Critical patent/JPS6354186B2/ja
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/01Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0142Structure of complete machines
    • G03G15/0147Structure of complete machines using a single reusable electrographic recording member
    • G03G15/0152Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member
    • G03G15/0157Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member with special treatment between monocolour image formation
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/01Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0142Structure of complete machines
    • G03G15/0147Structure of complete machines using a single reusable electrographic recording member
    • G03G15/0152Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member
    • G03G15/0163Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member primary transfer to the final recording medium

Abstract

PURPOSE:To achieve clear bicolor printing by preventing the 2nd toner from sticking on the 1st toner picture, by providing a means of discharging a photoconductor and the secondary electrifying means between the 1st developing means and 2nd exposing means. CONSTITUTION:An exposing means 12 and the 2nd charger 13 are provided behind the 1st developing device 4, and a photoconductive drum 1 on which the 1st toner picture is formed is first exposed by the exposing means 12 to lower its surface potential V1 nearly to zero. Then, the photoconductive drum 1 is electrified again positively and uniformly by the 2nd charger 13. To pring the photoconductive drum 1 in the 2nd color, the drum is exposed to the 2nd rays 6 of light carrying the 2nd information. Further, reversal development is carried out by using the 2nd toner 8 having the positive polarity and differing in color from the 1st toner 5, thus achieving clear bicolor printing.
JP55097515A 1980-07-18 1980-07-18 Expired JPS6354186B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55097515A JPS6354186B2 (en) 1980-07-18 1980-07-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55097515A JPS6354186B2 (en) 1980-07-18 1980-07-18

Publications (2)

Publication Number Publication Date
JPS5723952A true JPS5723952A (en) 1982-02-08
JPS6354186B2 JPS6354186B2 (en) 1988-10-27

Family

ID=14194386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55097515A Expired JPS6354186B2 (en) 1980-07-18 1980-07-18

Country Status (1)

Country Link
JP (1) JPS6354186B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050553A (en) * 1983-08-30 1985-03-20 Fujitsu Ltd Multicolor electronic recording method
JPH01118164A (en) * 1987-10-22 1989-05-10 Canon Inc Two-color electrophotographic device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236037A (en) * 1975-09-17 1977-03-19 Ricoh Co Ltd Color copying process

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236037A (en) * 1975-09-17 1977-03-19 Ricoh Co Ltd Color copying process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050553A (en) * 1983-08-30 1985-03-20 Fujitsu Ltd Multicolor electronic recording method
JPH0428306B2 (en) * 1983-08-30 1992-05-14 Fujitsu Ltd
JPH01118164A (en) * 1987-10-22 1989-05-10 Canon Inc Two-color electrophotographic device

Also Published As

Publication number Publication date
JPS6354186B2 (en) 1988-10-27

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