JPS5557871A - Developing method with magnetic brush - Google Patents

Developing method with magnetic brush

Info

Publication number
JPS5557871A
JPS5557871A JP12993178A JP12993178A JPS5557871A JP S5557871 A JPS5557871 A JP S5557871A JP 12993178 A JP12993178 A JP 12993178A JP 12993178 A JP12993178 A JP 12993178A JP S5557871 A JPS5557871 A JP S5557871A
Authority
JP
Japan
Prior art keywords
toner
carrier
carriers
friction
small
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
JP12993178A
Other languages
Japanese (ja)
Inventor
Tomoji Murata
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP12993178A priority Critical patent/JPS5557871A/en
Publication of JPS5557871A publication Critical patent/JPS5557871A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To reduce the dynamic friction between toners and carriers and enable the exchange frequencies of the toners and carriers to be reduced by using two kinds of carriers of large and small sizes.
CONSTITUTION: In an agitating part A, the large-size carrier and toner are agitated and the toner is friction-charged to + polarity and the carrier to - polarity. Next, of the mixture of the carrier and toner having been released to a toner part transfer part B, only the toner is transferred to the small-size carrier having beforehand adsorbed on a developing sleeve 4. In a developing part C, developing is accomplished by the magnetic brush formed by the small-size carrier and the toner adsorbed on its surfaces. In this way the large-size carrier has the share of the function of friction-charging the toner, and the small-size carrier the funtion of forming the magnetic brush, respectively and therefore the friction between the toners and carriers is reduced, hence their exchange frequencies may be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP12993178A 1978-10-20 1978-10-20 Developing method with magnetic brush Pending JPS5557871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12993178A JPS5557871A (en) 1978-10-20 1978-10-20 Developing method with magnetic brush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12993178A JPS5557871A (en) 1978-10-20 1978-10-20 Developing method with magnetic brush

Publications (1)

Publication Number Publication Date
JPS5557871A true JPS5557871A (en) 1980-04-30

Family

ID=15021954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12993178A Pending JPS5557871A (en) 1978-10-20 1978-10-20 Developing method with magnetic brush

Country Status (1)

Country Link
JP (1) JPS5557871A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204570A (en) * 1981-06-12 1982-12-15 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine
JPS5930568A (en) * 1982-08-13 1984-02-18 Canon Inc Developing device
JPS6153677A (en) * 1984-08-23 1986-03-17 Minolta Camera Co Ltd Dry developing device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204570A (en) * 1981-06-12 1982-12-15 Fuji Xerox Co Ltd Developing device of electrophotographic copying machine
JPH027472B2 (en) * 1981-06-12 1990-02-19 Fuji Xerox Co Ltd
JPS5930568A (en) * 1982-08-13 1984-02-18 Canon Inc Developing device
JPH0510672B2 (en) * 1982-08-13 1993-02-10 Canon Kk
JPS6153677A (en) * 1984-08-23 1986-03-17 Minolta Camera Co Ltd Dry developing device
JPH0448232B2 (en) * 1984-08-23 1992-08-06 Minolta Camera Kk

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