JPS5459150A - Dichromatic electrophotographic copier - Google Patents

Dichromatic electrophotographic copier

Info

Publication number
JPS5459150A
JPS5459150A JP12542577A JP12542577A JPS5459150A JP S5459150 A JPS5459150 A JP S5459150A JP 12542577 A JP12542577 A JP 12542577A JP 12542577 A JP12542577 A JP 12542577A JP S5459150 A JPS5459150 A JP S5459150A
Authority
JP
Japan
Prior art keywords
photoreceptors
dichromatic
photoreceptor
document
latent images
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
JP12542577A
Other languages
Japanese (ja)
Inventor
Ryuzo Suzuki
Kazuo Nojima
Nobuo Kasahara
Michio Takahashi
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 JP12542577A priority Critical patent/JPS5459150A/en
Publication of JPS5459150A publication Critical patent/JPS5459150A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To copy a dichromatic original document, such as, red and black, etc. on the white ground by cancelling the electric charge of a latent image each other and transferring it due to the contact of the first and second photoreceptors of belt or drum shape.
CONSTITUTION: The first and second photoreceptors 2, 3 are rotated while they are being charged uniformly by chargers 21, 31. Original document O is scanned at the exposure unit, the mirror image of the document O is radiatd on the photoreceptor 2 via color filter 22 while the positive image of the document 0 is radiated on the photoreceptor 3 via color filter 32, and electrostatic latent images of opposite polarities each other are formed. Electrostatic latent images formed on the photoreceptors 2, 3 move with the rotation of the photoreceptors, accumulate one above another at the contact unit, and the cancel of electric charge occurs. In this state, dichromatic eectrostatic latent images formed on the surface of the photoreceptor 2 are colored with black and red colors, made visible by developing device 23 with the toners charged by positive and negative polaities, respectively, and transferred on recording sheet S as the positive image
COPYRIGHT: (C)1979,JPO&Japio
JP12542577A 1977-10-19 1977-10-19 Dichromatic electrophotographic copier Pending JPS5459150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12542577A JPS5459150A (en) 1977-10-19 1977-10-19 Dichromatic electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12542577A JPS5459150A (en) 1977-10-19 1977-10-19 Dichromatic electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS5459150A true JPS5459150A (en) 1979-05-12

Family

ID=14909774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12542577A Pending JPS5459150A (en) 1977-10-19 1977-10-19 Dichromatic electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5459150A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6970673B2 (en) * 2003-10-28 2005-11-29 Xerox Corporation Highlight color printing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6970673B2 (en) * 2003-10-28 2005-11-29 Xerox Corporation Highlight color printing machine

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