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JPS55110260A - Two-color electrophotographic copying method - Google Patents

Two-color electrophotographic copying method

Info

Publication number
JPS55110260A
JPS55110260A JP1809279A JP1809279A JPS55110260A JP S55110260 A JPS55110260 A JP S55110260A JP 1809279 A JP1809279 A JP 1809279A JP 1809279 A JP1809279 A JP 1809279A JP S55110260 A JPS55110260 A JP S55110260A
Authority
JP
Japan
Prior art keywords
photoreceptor
light
red
photosensitivity
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.)
Pending
Application number
JP1809279A
Other languages
Japanese (ja)
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 JP1809279A priority Critical patent/JPS55110260A/en
Publication of JPS55110260A publication Critical patent/JPS55110260A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable a 2-color positive image copy to be obtained from a 2-color negative original, by using a photoreceptor consisting of a photoconductive layer having photosensitivity to a specified color, and a photoconductive layer not having photosensitivity to this color, charging the photoreceptor to a specified polarity, and irradiating it by light.
CONSTITUTION: Photoreceptor P to be formed on conductive substrate 1 consists of photoconductive layer 2 having positive chargeability and having photosensitivity to blue and red lights, but not to green light, and photoconductive layer 3 having negative chargeability and photosensitivity to green light, but not to blue and red lights. This photoreceptor P surface is uniformly negatively charged and irradiated by the light image of negative original 5 having black area 5a, white area 5b, and red area 5c. Then, photoreceptor P surface is uniformly irradiated by light through red filter 6, uniformly positively charged, again irradiated by light through red filter 6 uniformly, and then supply of negatively charged black toner 8 and positively charged red toner 9 forms a positive image reversed in the black and white areas of the negative original.
COPYRIGHT: (C)1980,JPO&Japio
JP1809279A 1979-02-19 1979-02-19 Two-color electrophotographic copying method Pending JPS55110260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1809279A JPS55110260A (en) 1979-02-19 1979-02-19 Two-color electrophotographic copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1809279A JPS55110260A (en) 1979-02-19 1979-02-19 Two-color electrophotographic copying method

Publications (1)

Publication Number Publication Date
JPS55110260A true JPS55110260A (en) 1980-08-25

Family

ID=11961984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1809279A Pending JPS55110260A (en) 1979-02-19 1979-02-19 Two-color electrophotographic copying method

Country Status (1)

Country Link
JP (1) JPS55110260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362586A (en) * 1990-12-27 1994-11-08 Xerox Corporation Process for two color imaging comprising a photoreceptor having a unipolar hole transporting layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362586A (en) * 1990-12-27 1994-11-08 Xerox Corporation Process for two color imaging comprising a photoreceptor having a unipolar hole transporting layer

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