JPS5772152A - Two-color electrophotographic copying method - Google Patents

Two-color electrophotographic copying method

Info

Publication number
JPS5772152A
JPS5772152A JP55147740A JP14774080A JPS5772152A JP S5772152 A JPS5772152 A JP S5772152A JP 55147740 A JP55147740 A JP 55147740A JP 14774080 A JP14774080 A JP 14774080A JP S5772152 A JPS5772152 A JP S5772152A
Authority
JP
Japan
Prior art keywords
charged
photoreceptor
color
black
image
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
JP55147740A
Other languages
Japanese (ja)
Other versions
JPS64691B2 (en
Inventor
Toshio Sakai
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 JP55147740A priority Critical patent/JPS5772152A/en
Publication of JPS5772152A publication Critical patent/JPS5772152A/en
Publication of JPS64691B2 publication Critical patent/JPS64691B2/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

Abstract

PURPOSE:To obtain a 2-color copy, by imagewise exposing a photoreceptor directly or interposing a specified light-nontransmitting filter, forming a electrostatic latent image having reverse polarity potential distribution on a photoreceptor surface, and selectively using 2 kinds of toners charged to reverse polarities for development. CONSTITUTION:When, for example, red light LR irradiates a photoreceptor 1 at the same time as a charger 2 corona charges it negatively, a photoconductive layer 1C is made conductive, so a photoconductive layer 1B is charged. Then, a charger 3 corona charges it positively in the dark, and the photoconductive layers 1B, 1C are charged opposite to each other by charging less than the preceding negative charging. The photoreceptor 1 is exposed to the optical image of a red and black 2-color original 01 or a blue and black 2-color original, and developed with a negatively charged black toner TN and a positively charged red toner TR, resulting in forming a high-quality 2-color visible image. This image is again charged to negative polarity, transferred to a sheet of plain paper, and then, heat fixed to form a superior 2-color copy.
JP55147740A 1980-10-22 1980-10-22 Two-color electrophotographic copying method Granted JPS5772152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55147740A JPS5772152A (en) 1980-10-22 1980-10-22 Two-color electrophotographic copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55147740A JPS5772152A (en) 1980-10-22 1980-10-22 Two-color electrophotographic copying method

Publications (2)

Publication Number Publication Date
JPS5772152A true JPS5772152A (en) 1982-05-06
JPS64691B2 JPS64691B2 (en) 1989-01-09

Family

ID=15437064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55147740A Granted JPS5772152A (en) 1980-10-22 1980-10-22 Two-color electrophotographic copying method

Country Status (1)

Country Link
JP (1) JPS5772152A (en)

Citations (2)

* 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
JPS5437746A (en) * 1977-08-30 1979-03-20 Ricoh Co Ltd Method and apparatus for electrophotographic dichromatic copying

Patent Citations (2)

* 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
JPS5437746A (en) * 1977-08-30 1979-03-20 Ricoh Co Ltd Method and apparatus for electrophotographic dichromatic copying

Also Published As

Publication number Publication date
JPS64691B2 (en) 1989-01-09

Similar Documents

Publication Publication Date Title
JPS5683757A (en) Electrophotographic type two-color copy recording method
JPS5612650A (en) Two-color electrophotographic developing method and its printing method
JPS5782848A (en) Electrophotographing method
JPS5772152A (en) Two-color electrophotographic copying method
JPS5573062A (en) Two color electrophotographic copying method
JPS5782850A (en) Electrophotographic method
JPS5576360A (en) Dry development system
JPS5782849A (en) Electrophotographing method
JPS5622440A (en) Electrophotographic composite photoreceptor
JPS54112634A (en) Electrophotographic process and device
JPS5742057A (en) Single color electrophotographic copying method
JPS5774767A (en) Electrophotographic device
JPS54141129A (en) Two-color electrophotographic copying method
JPS5792340A (en) Copying method
JPS5778048A (en) Two-color image formation method
JPS57125951A (en) Electrophotographic recording method
JPS5722249A (en) Multicolor electrophotographic copying method
JPS5636659A (en) Method for making plural copies
JPS57195264A (en) Electrophotographic copying printer device
JPS5734565A (en) Partly colored 2-color electrophotographing method
JPS54143139A (en) Copying method for dichroic zerography
JPS5515151A (en) Electrophotographic method
JPS57172355A (en) Electrophotographic copying method for plural copies
JPS55117155A (en) Copying method
JPS566265A (en) Multichromatic electrophotographic copying method