JPS566265A - Multichromatic electrophotographic copying method - Google Patents

Multichromatic electrophotographic copying method

Info

Publication number
JPS566265A
JPS566265A JP8235479A JP8235479A JPS566265A JP S566265 A JPS566265 A JP S566265A JP 8235479 A JP8235479 A JP 8235479A JP 8235479 A JP8235479 A JP 8235479A JP S566265 A JPS566265 A JP S566265A
Authority
JP
Japan
Prior art keywords
red
toner
photoconductive layer
negative
photosensitivity
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
JP8235479A
Other languages
Japanese (ja)
Inventor
Kunihiko Ikeda
Shuichi Karasawa
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 JP8235479A priority Critical patent/JPS566265A/en
Publication of JPS566265A publication Critical patent/JPS566265A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the toner images developed previously from being disturbed at the later development by approaching the potential of the other electrostatic latent image to zero as far as possible at the time of developing one electrostatic latent image.
CONSTITUTION: A photosensitive drum consists of a conductive layer 2 being a substrate, the 1st photoconductive layer 3 and the 2nd photoconductive layer 4. The photoconductive layer 3 has chargeable to positive and has photosensitivity to blue and red and has no photosencitivity to green. The photoconductive layer 4 is chargeable to negative and has no photosensitivity to blue and red and has photosensitivity to green. The surface potential of the photosensitive drum is made -1,100V by a charger 6 which has been applied with -6.5kV in the 1st process and is made +100V by a charger 6 which has been applied with +5.5kV in the 2nd process. In the 3rd process, the light image of the original having black 41a, white 41b, red 41c is irradiated. Here, if the red-color toner TR having been charged positive is supplied by the 1st developing device, the toner TR is absorbed to the negative potential region 1c. In the 4th process, negative electrode is discharged and the black-color toner TB having been charged negative here is supplied, the toner TB is adsorbed to the black-color region 1a.
COPYRIGHT: (C)1981,JPO&Japio
JP8235479A 1979-06-29 1979-06-29 Multichromatic electrophotographic copying method Pending JPS566265A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8235479A JPS566265A (en) 1979-06-29 1979-06-29 Multichromatic electrophotographic copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8235479A JPS566265A (en) 1979-06-29 1979-06-29 Multichromatic electrophotographic copying method

Publications (1)

Publication Number Publication Date
JPS566265A true JPS566265A (en) 1981-01-22

Family

ID=13772230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8235479A Pending JPS566265A (en) 1979-06-29 1979-06-29 Multichromatic electrophotographic copying method

Country Status (1)

Country Link
JP (1) JPS566265A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS625277A (en) * 1985-06-29 1987-01-12 Toshiba Corp Developing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS625277A (en) * 1985-06-29 1987-01-12 Toshiba Corp Developing device

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