JPS5611463A - Electrophotographic process and its apparatus - Google Patents

Electrophotographic process and its apparatus

Info

Publication number
JPS5611463A
JPS5611463A JP8726279A JP8726279A JPS5611463A JP S5611463 A JPS5611463 A JP S5611463A JP 8726279 A JP8726279 A JP 8726279A JP 8726279 A JP8726279 A JP 8726279A JP S5611463 A JPS5611463 A JP S5611463A
Authority
JP
Japan
Prior art keywords
photoreceptor
light
toner
red
surface potential
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
JP8726279A
Other languages
Japanese (ja)
Inventor
Fuyuhiko Matsumoto
Shuichi Tsushima
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 JP8726279A priority Critical patent/JPS5611463A/en
Publication of JPS5611463A publication Critical patent/JPS5611463A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enhance transfer efficiency, by illuminating a photoreceptor from a conductive substrate side at the same time as transfer charging on the area to be transferred, and rendering photoreceptor surface potential same as attached toner polarity, or erasing said potential.
CONSTITUTION: The first photoconductive layer 22 sensitive to the visible light region, and the second photoconductive layer 23 transmitting a specified chromatic light, such as red, but having sensitivity to light except said light are laminated on transparent conductive substrate 21 to form photoreceptor 20, which is negatively charged with primary charger 24 under red light illumination, positively charged with secondary charger 25, then exposed to a 2-color original light image, and developed with positively charged red toner TR and negatively charged black toner TB. Subsequently, photoreceptor 20 is illuminated by red light using an exposing unit to render to surface potential of the part with toner TB attached negative, illuminated by blue light to render the whole surface potential of photoreceptor zero, thus permitting the attractive force of photoreceptor for toners TB, TR to be wholly erased, and toners TB, TR to be transferred efficiently to transfer paper P.
COPYRIGHT: (C)1981,JPO&Japio
JP8726279A 1979-07-09 1979-07-09 Electrophotographic process and its apparatus Pending JPS5611463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8726279A JPS5611463A (en) 1979-07-09 1979-07-09 Electrophotographic process and its apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8726279A JPS5611463A (en) 1979-07-09 1979-07-09 Electrophotographic process and its apparatus

Publications (1)

Publication Number Publication Date
JPS5611463A true JPS5611463A (en) 1981-02-04

Family

ID=13909853

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8726279A Pending JPS5611463A (en) 1979-07-09 1979-07-09 Electrophotographic process and its apparatus

Country Status (1)

Country Link
JP (1) JPS5611463A (en)

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