JPS5458444A - Electrophotographic dichromatic reproducing method - Google Patents

Electrophotographic dichromatic reproducing method

Info

Publication number
JPS5458444A
JPS5458444A JP12493477A JP12493477A JPS5458444A JP S5458444 A JPS5458444 A JP S5458444A JP 12493477 A JP12493477 A JP 12493477A JP 12493477 A JP12493477 A JP 12493477A JP S5458444 A JPS5458444 A JP S5458444A
Authority
JP
Japan
Prior art keywords
black
red
photoreceptor
latent image
image corresponding
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
JP12493477A
Other languages
Japanese (ja)
Inventor
Michio Takahashi
Nobuo Kasahara
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 JP12493477A priority Critical patent/JPS5458444A/en
Publication of JPS5458444A publication Critical patent/JPS5458444A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable black image to be reproduced with high purity and sharpness by changing the polarity or potential of the latent image corresponding to the black color part of the original formed on a photoreceptor by using a specific roller.
CONSTITUTION: The surface of the photoconductive layer 1b of a photoreceptor 1 is charged to + by a corona charger 2. Next, a dichromatic original 3 having white part 3a, red part 3b, black part 3c is radiated to the photoreceptor 1 by lamps 4, 5 via red filter 6, whereby the latent image corresponding to the black part is formed. A roller 7 which has - potential is contacted to the photoreceptor surface, by which the regions corresponding to the white part where there is no potential and the red part are charged to - and the potential of the latent image corresponding to the black part decreases. Next, the original 3 is radiated via cyan color filter 8, whereby the latent image corresponding to the red part is newly formed on the photoreceptor 1 surface. The red toner 9 charged to + and the black toner 10 charged to - are supplied to the latent image corresponding to the black part of + polarity, whereby the red image and black image of the original are reproduced
COPYRIGHT: (C)1979,JPO&Japio
JP12493477A 1977-10-18 1977-10-18 Electrophotographic dichromatic reproducing method Pending JPS5458444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12493477A JPS5458444A (en) 1977-10-18 1977-10-18 Electrophotographic dichromatic reproducing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12493477A JPS5458444A (en) 1977-10-18 1977-10-18 Electrophotographic dichromatic reproducing method

Publications (1)

Publication Number Publication Date
JPS5458444A true JPS5458444A (en) 1979-05-11

Family

ID=14897775

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12493477A Pending JPS5458444A (en) 1977-10-18 1977-10-18 Electrophotographic dichromatic reproducing method

Country Status (1)

Country Link
JP (1) JPS5458444A (en)

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