JPH01310368A - Two-color electrophotographic device - Google Patents

Two-color electrophotographic device

Info

Publication number
JPH01310368A
JPH01310368A JP14061488A JP14061488A JPH01310368A JP H01310368 A JPH01310368 A JP H01310368A JP 14061488 A JP14061488 A JP 14061488A JP 14061488 A JP14061488 A JP 14061488A JP H01310368 A JPH01310368 A JP H01310368A
Authority
JP
Japan
Prior art keywords
toner
latent image
reversal
image
grain
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
JP14061488A
Other languages
Japanese (ja)
Inventor
Tatsuya Kobayashi
Masao Yoshikawa
Junichi Kato
Tatsuichi Tsukida
Haruo Fujii
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14061488A priority Critical patent/JPH01310368A/en
Publication of JPH01310368A publication Critical patent/JPH01310368A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To eliminate fog arising on a transfer material in a two-color electrophotograph by making to adhere spacer grain of a prescribed grain diameter to the part where a latent image is not formed on a latent image carrier, after charging process.
CONSTITUTION: The instant a two-color electrophotographing device is activated, a first exposing device 3a exposes an image, then a photosensitive drum 1 forms a first electrostatic latent image. When a first developing system 4 visualizes the image, two-component developer is used as a developer composed of non-magnetic toner and magnetic grain. A second exposing device 5 exposes an image so that an electrostatic latent image is formed, then a second developing system 6 visualizes it. In the developing system 6, mono-component magnetic toner as developer is used; for spacer grain, reversal toner is mixed with said toner, the reversal toner having a grain diameter of 10W100μm and being charged in the reversal polarity of normal polarity. The toner with the normal polarity and the reversal toner respectively adhere to the part where the latent image is formed and part where the latent image is not formed. Thus, the reversal toner is not transferred to the transfer material 9, and as spacer, it satisfactorily separates the transfer material 9.
COPYRIGHT: (C)1989,JPO&Japio
JP14061488A 1988-06-09 1988-06-09 Two-color electrophotographic device Pending JPH01310368A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14061488A JPH01310368A (en) 1988-06-09 1988-06-09 Two-color electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14061488A JPH01310368A (en) 1988-06-09 1988-06-09 Two-color electrophotographic device

Publications (1)

Publication Number Publication Date
JPH01310368A true JPH01310368A (en) 1989-12-14

Family

ID=15272804

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14061488A Pending JPH01310368A (en) 1988-06-09 1988-06-09 Two-color electrophotographic device

Country Status (1)

Country Link
JP (1) JPH01310368A (en)

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