JPS5720744A - Method for dichromic electrophotography - Google Patents

Method for dichromic electrophotography

Info

Publication number
JPS5720744A
JPS5720744A JP9573880A JP9573880A JPS5720744A JP S5720744 A JPS5720744 A JP S5720744A JP 9573880 A JP9573880 A JP 9573880A JP 9573880 A JP9573880 A JP 9573880A JP S5720744 A JPS5720744 A JP S5720744A
Authority
JP
Japan
Prior art keywords
tonor
latent image
charging
reversely
electrostatic latent
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
JP9573880A
Other languages
Japanese (ja)
Other versions
JPS6354184B2 (en
Inventor
Nobuyoshi Hoshi
Masayasu Anzai
Isamu Komatsu
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 JP9573880A priority Critical patent/JPS5720744A/en
Publication of JPS5720744A publication Critical patent/JPS5720744A/en
Publication of JPS6354184B2 publication Critical patent/JPS6354184B2/ja
Granted 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
    • G03G13/013—Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To prevent the mixing of colors caused by the attachment of the 2nd tonor to a picture colored by the 1st tonor when an electrostatic latent image on a recording element is reversely developed with tonors having different colors in the 1st and 2nd developing vessels by increasing the quantity of charging of the 2nd tonor more than that of the 1st tonor. CONSTITUTION:After charging, for example, with positive electricity and irradiating the 1st ray of light 3, the 1st electrostatic latent image is formed on a recording element 1 having a light conductive element 1b on its base plate 1a to develope the latent image reversely by using positively charged black tonor 5 whose charging quantity is about 10muc/g. Then the 2nd ray of light is irradiated to form an electrostatic latent image, which is developed reversely, for example, by the positively charged red tonor 8 whose charging quantity is 15-30muc/g in the 2nd developing vessel 7. The image colored by both the red and black tonors is transferred on a recording paper 9 by a charging equipment 10. The 2nd tonor 8 is not adhered to the portion colored by the 1st tonor 5 because of large repulsion.
JP9573880A 1980-07-15 1980-07-15 Method for dichromic electrophotography Granted JPS5720744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9573880A JPS5720744A (en) 1980-07-15 1980-07-15 Method for dichromic electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9573880A JPS5720744A (en) 1980-07-15 1980-07-15 Method for dichromic electrophotography

Publications (2)

Publication Number Publication Date
JPS5720744A true JPS5720744A (en) 1982-02-03
JPS6354184B2 JPS6354184B2 (en) 1988-10-27

Family

ID=14145820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9573880A Granted JPS5720744A (en) 1980-07-15 1980-07-15 Method for dichromic electrophotography

Country Status (1)

Country Link
JP (1) JPS5720744A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159551A (en) * 1982-03-17 1983-09-21 Fujitsu Ltd Multicolor recording device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52106743A (en) * 1976-03-04 1977-09-07 Fujitsu Ltd High-speed multi-color printing
JPS5538538A (en) * 1978-09-11 1980-03-18 Ricoh Co Ltd Developing method in two color electrophotographic copying system
JPS5557864A (en) * 1978-10-23 1980-04-30 Ricoh Co Ltd Developing method of electrophotography
JPS5576360A (en) * 1978-12-05 1980-06-09 Ricoh Co Ltd Dry development system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52106743A (en) * 1976-03-04 1977-09-07 Fujitsu Ltd High-speed multi-color printing
JPS5538538A (en) * 1978-09-11 1980-03-18 Ricoh Co Ltd Developing method in two color electrophotographic copying system
JPS5557864A (en) * 1978-10-23 1980-04-30 Ricoh Co Ltd Developing method of electrophotography
JPS5576360A (en) * 1978-12-05 1980-06-09 Ricoh Co Ltd Dry development system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159551A (en) * 1982-03-17 1983-09-21 Fujitsu Ltd Multicolor recording device

Also Published As

Publication number Publication date
JPS6354184B2 (en) 1988-10-27

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