JPS5792340A - Copying method - Google Patents

Copying method

Info

Publication number
JPS5792340A
JPS5792340A JP55167750A JP16775080A JPS5792340A JP S5792340 A JPS5792340 A JP S5792340A JP 55167750 A JP55167750 A JP 55167750A JP 16775080 A JP16775080 A JP 16775080A JP S5792340 A JPS5792340 A JP S5792340A
Authority
JP
Japan
Prior art keywords
photosensitive body
charged
surface potential
color
irradiated
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
JP55167750A
Other languages
Japanese (ja)
Other versions
JPS6365937B2 (en
Inventor
Masao Yoshikawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55167750A priority Critical patent/JPS5792340A/en
Publication of JPS5792340A publication Critical patent/JPS5792340A/en
Publication of JPS6365937B2 publication Critical patent/JPS6365937B2/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)

Abstract

PURPOSE:To copy an optical part of a black image in a monochromatic original, to a color being different from other part, by constituting so that electrostatic latent images charged in the opposite polarity to each other are made visible by 2 kinds of toners colored in each different color. CONSTITUTION:A photoconductive layer 12 is converted to an electric conductor by uniformly irradiating a red light beam LR to a photosensitive body 1, and an electric double layer is formed through a photoconductive layer 11. Subsequently, charging of the opposite polarity is executed in a dark place, the layers 11, 12 are charged in reverse to each other, and after that, when a part of the photosensitive body 1 is irradiated uniformly by the red color beam LR, only the layer 12 of the irradiated part is converted to an electric conductor, the surface potential of the photosensitive body 1 is inverted to the positive polarity. Also, the part of the photosensitive body 1 corresponding to the white ground part is irradiated by a white light beam LW, and its surface potential is made to zero. Subsequently, the surface potential distribution of negative polarity of the photosensitive body 1 is made visible by a black toner Tn which has been charged positive, and the surface potential distribution of positive polarity is made visible by a red toner Tr which has been charged negative, by which a 2-color visible image is obtained on the photosensitive body 1.
JP55167750A 1980-11-28 1980-11-28 Copying method Granted JPS5792340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55167750A JPS5792340A (en) 1980-11-28 1980-11-28 Copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55167750A JPS5792340A (en) 1980-11-28 1980-11-28 Copying method

Publications (2)

Publication Number Publication Date
JPS5792340A true JPS5792340A (en) 1982-06-08
JPS6365937B2 JPS6365937B2 (en) 1988-12-19

Family

ID=15855401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55167750A Granted JPS5792340A (en) 1980-11-28 1980-11-28 Copying method

Country Status (1)

Country Link
JP (1) JPS5792340A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02501367A (en) * 1986-11-20 1990-05-17 マセドー，ペドロ　ビー． ion exchange composition

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417846A (en) * 1977-07-11 1979-02-09 Ricoh Co Ltd Dichromatic electrophotographic copying method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417846A (en) * 1977-07-11 1979-02-09 Ricoh Co Ltd Dichromatic electrophotographic copying method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02501367A (en) * 1986-11-20 1990-05-17 マセドー，ペドロ　ビー． ion exchange composition

Also Published As

Publication number Publication date
JPS6365937B2 (en) 1988-12-19

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