JPS5633657A - Method for marking electrophotographic copy - Google Patents

Method for marking electrophotographic copy

Info

Publication number
JPS5633657A
JPS5633657A JP10864979A JP10864979A JPS5633657A JP S5633657 A JPS5633657 A JP S5633657A JP 10864979 A JP10864979 A JP 10864979A JP 10864979 A JP10864979 A JP 10864979A JP S5633657 A JPS5633657 A JP S5633657A
Authority
JP
Japan
Prior art keywords
receptor
layer
color
black
latent 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.)
Pending
Application number
JP10864979A
Other languages
Japanese (ja)
Inventor
Tsutomu Ishida
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 JP10864979A priority Critical patent/JPS5633657A/en
Publication of JPS5633657A publication Critical patent/JPS5633657A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable a specified pattern to be marked at the same time as a latent image is formed, by providing on part of a photoreceptor surface another photoconductive layer to be charged to a polarity reverse to that of the latent image to be formed on a photoreceptor.
CONSTITUTION: Electrophotographic receptor 1 usually employed in black and white copying is provided on part of it with photoconductive layer 3 having sensitivity to a light of a certain color but transmitting the light of the other color capable of rendering receptor 1 under this layer 3 substantially conductive. Interlayer 4 may be interposed between receptor 1 and layer 3. It is convenient that a mark, such as "secret" in a color not black and white but red can be formed by exposing layer 3 on part of receptor 1 at the same time as charging exposure of receptor 1.
COPYRIGHT: (C)1981,JPO&Japio
JP10864979A 1979-08-28 1979-08-28 Method for marking electrophotographic copy Pending JPS5633657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10864979A JPS5633657A (en) 1979-08-28 1979-08-28 Method for marking electrophotographic copy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10864979A JPS5633657A (en) 1979-08-28 1979-08-28 Method for marking electrophotographic copy

Publications (1)

Publication Number Publication Date
JPS5633657A true JPS5633657A (en) 1981-04-04

Family

ID=14490151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10864979A Pending JPS5633657A (en) 1979-08-28 1979-08-28 Method for marking electrophotographic copy

Country Status (1)

Country Link
JP (1) JPS5633657A (en)

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