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JPS55143568A - Developing device - Google Patents

Developing device

Info

Publication number
JPS55143568A
JPS55143568A JP5191679A JP5191679A JPS55143568A JP S55143568 A JPS55143568 A JP S55143568A JP 5191679 A JP5191679 A JP 5191679A JP 5191679 A JP5191679 A JP 5191679A JP S55143568 A JPS55143568 A JP S55143568A
Authority
JP
Japan
Prior art keywords
toners
different color
separating
separated
attracted
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.)
Granted
Application number
JP5191679A
Other languages
Japanese (ja)
Other versions
JPS6222146B2 (en
Inventor
Kunihiko Ikeda
Shuichi Tsushima
Fuyuhiko Matsumoto
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 JP5191679A priority Critical patent/JPS55143568A/en
Priority to US06/142,600 priority patent/US4351604A/en
Priority to DE19803016243 priority patent/DE3016243C2/en
Publication of JPS55143568A publication Critical patent/JPS55143568A/en
Publication of JPS6222146B2 publication Critical patent/JPS6222146B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To eliminate the stains of toner image owing to two-color development and enhance the quality of copied matter by separating and removing different color toners prior to entry of said different color toners or separating and removing the different color toners having mixed. CONSTITUTION:The surface of the conductive metal roller 20 of a developing device 6 which uses two-component-base developing material composed of toners and carriers is coated to constitute an insulation layer 20a. The material which charges to the polarity opposite from the polarity of the toners to be separated by making friction contact with carriers is selected for the material which forms the insulation layer 20a. Hence, the toners to be separated are attracted and scraped by a separating roller 19 and are thereby recovered. In the case of using one-component type developing material, the separating roller is made biasing roll member 21 and is connected to a DC electric power source 22. In case the different color toners have mixed, a conductive net 62 is provided and the toners are attracted by an electrode 64 or the toners to be separated are removed by being vibrated by an excitor.
JP5191679A 1979-04-26 1979-04-26 Developing device Granted JPS55143568A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP5191679A JPS55143568A (en) 1979-04-26 1979-04-26 Developing device
US06/142,600 US4351604A (en) 1979-04-26 1980-04-22 Multi-color electrostatic copying apparatus
DE19803016243 DE3016243C2 (en) 1979-04-26 1980-04-26 Two-color electrostatic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5191679A JPS55143568A (en) 1979-04-26 1979-04-26 Developing device

Publications (2)

Publication Number Publication Date
JPS55143568A true JPS55143568A (en) 1980-11-08
JPS6222146B2 JPS6222146B2 (en) 1987-05-15

Family

ID=12900190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5191679A Granted JPS55143568A (en) 1979-04-26 1979-04-26 Developing device

Country Status (1)

Country Link
JP (1) JPS55143568A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58199364A (en) * 1982-05-18 1983-11-19 Hitachi Ltd Developing device
JPS59231558A (en) * 1983-06-14 1984-12-26 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine
JPS59231557A (en) * 1983-06-14 1984-12-26 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine
JPS61228477A (en) * 1985-04-01 1986-10-11 ゼロツクス　コーポレーシヨン Developer
JPS62173481A (en) * 1986-01-27 1987-07-30 Matsushita Electric Ind Co Ltd Electrostatic recording device

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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58199364A (en) * 1982-05-18 1983-11-19 Hitachi Ltd Developing device
JPH031662B2 (en) * 1982-05-18 1991-01-11 Hitachi Ltd
JPS59231558A (en) * 1983-06-14 1984-12-26 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine
JPS59231557A (en) * 1983-06-14 1984-12-26 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine
JPS61228477A (en) * 1985-04-01 1986-10-11 ゼロツクス　コーポレーシヨン Developer
JPS62173481A (en) * 1986-01-27 1987-07-30 Matsushita Electric Ind Co Ltd Electrostatic recording device

Also Published As

Publication number Publication date
JPS6222146B2 (en) 1987-05-15

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