JPS5680068A - Developing device for two-color electrophotography - Google Patents

Developing device for two-color electrophotography

Info

Publication number
JPS5680068A
JPS5680068A JP15771679A JP15771679A JPS5680068A JP S5680068 A JPS5680068 A JP S5680068A JP 15771679 A JP15771679 A JP 15771679A JP 15771679 A JP15771679 A JP 15771679A JP S5680068 A JPS5680068 A JP S5680068A
Authority
JP
Japan
Prior art keywords
developing device
toner
developing
roller
toners
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
JP15771679A
Other languages
Japanese (ja)
Inventor
Kunihiko Ikeda
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 JP15771679A priority Critical patent/JPS5680068A/en
Priority to DE19803016243 priority patent/DE3016243C2/en
Publication of JPS5680068A publication Critical patent/JPS5680068A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform the separation and recovery of mixed toners surely by disposing a separating roller having the potential of the polarity opposite from that of the toner in the 1st developing device in the position where the toner after development in the 2nd developing device falls.
CONSTITUTION: In the developing device for two-color electrophotography, two kinds of latent images of mutually different polarities formed on a photoreceptor are successively devloped by the 1st and 2nd developing devices contatining two kinds of toners of different colors and charging polarities respectively separately. At the time of developing in the 2nd developing device, the toner image 23 formed by the development with the 1st developing device already exists on a photoreceptor 19 and when the developing roller 15 of the 2nd developing device rubs this, the toner of the surface layer is scrapped off. The toner mixed in this way is removed by a separating roller 24 which is revolving. In addition, the mixed toners having adhered on the roller 24 are scrapped off by a scraping member 25 and are recovered into a vessel 26.
COPYRIGHT: (C)1981,JPO&Japio
JP15771679A 1979-04-26 1979-12-05 Developing device for two-color electrophotography Pending JPS5680068A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15771679A JPS5680068A (en) 1979-12-05 1979-12-05 Developing device for two-color electrophotography
DE19803016243 DE3016243C2 (en) 1979-04-26 1980-04-26 Two-color electrostatic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15771679A JPS5680068A (en) 1979-12-05 1979-12-05 Developing device for two-color electrophotography

Publications (1)

Publication Number Publication Date
JPS5680068A true JPS5680068A (en) 1981-07-01

Family

ID=15655806

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15771679A Pending JPS5680068A (en) 1979-04-26 1979-12-05 Developing device for two-color electrophotography

Country Status (1)

Country Link
JP (1) JPS5680068A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108557A (en) * 1981-12-22 1983-06-28 Fujitsu Ltd Two-color recording device
JPS5978377A (en) * 1982-10-28 1984-05-07 Fujitsu Ltd Developing device of multicolor recording device
JPS62195155U (en) * 1986-05-30 1987-12-11

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104834A (en) * 1978-02-06 1979-08-17 Ricoh Co Ltd Two-color image reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104834A (en) * 1978-02-06 1979-08-17 Ricoh Co Ltd Two-color image reproducing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108557A (en) * 1981-12-22 1983-06-28 Fujitsu Ltd Two-color recording device
JPH041906B2 (en) * 1981-12-22 1992-01-14 Fujitsu Ltd
JPS5978377A (en) * 1982-10-28 1984-05-07 Fujitsu Ltd Developing device of multicolor recording device
JPH0447825B2 (en) * 1982-10-28 1992-08-05 Fujitsu Ltd
JPS62195155U (en) * 1986-05-30 1987-12-11

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