JPS57190974A - Electrophotographic developing device - Google Patents

Electrophotographic developing device

Info

Publication number
JPS57190974A
JPS57190974A JP7593681A JP7593681A JPS57190974A JP S57190974 A JPS57190974 A JP S57190974A JP 7593681 A JP7593681 A JP 7593681A JP 7593681 A JP7593681 A JP 7593681A JP S57190974 A JPS57190974 A JP S57190974A
Authority
JP
Japan
Prior art keywords
roll
sleeve
developer
developing device
drum
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
JP7593681A
Other languages
Japanese (ja)
Inventor
Yoshisuke Takekida
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7593681A priority Critical patent/JPS57190974A/en
Publication of JPS57190974A publication Critical patent/JPS57190974A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE:To improve the mechanical reliability of an elctrophotographic developing device, by providing the eccentricity between a developing sleeve and a magnetic roll, and eliminating necessity of a scraper for developer carrier. CONSTITUTION:A magnetic roll 6 having a magnetic arrangement as shown in the figure is set with the eccentricity to a development sleeve 5 which turns at a low speed and turned at a high speed. The developer 7 in a developing device 2 is carried upward by a basket of a carrying roll 8 and attracted to the surface of the sleeve 5 by the function of the roll 6. Then the developer is sent in the direction opposite to the revolution of the roll 6 and has a contact with friction with a photosensitive drum 1. Thus the latent image of the drum 1 is developed. The distance between the sleeve 5 and the roll 6 increases as they go further away from the drum 1. As a result, the developer 7 drops to the device 2 by its empty weight. In such constitution, the blade which is pressed to the sleeve 5 is eliminated to improve the mechanical reliability.
JP7593681A 1981-05-20 1981-05-20 Electrophotographic developing device Pending JPS57190974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7593681A JPS57190974A (en) 1981-05-20 1981-05-20 Electrophotographic developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7593681A JPS57190974A (en) 1981-05-20 1981-05-20 Electrophotographic developing device

Publications (1)

Publication Number Publication Date
JPS57190974A true JPS57190974A (en) 1982-11-24

Family

ID=13590627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7593681A Pending JPS57190974A (en) 1981-05-20 1981-05-20 Electrophotographic developing device

Country Status (1)

Country Link
JP (1) JPS57190974A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714046A (en) * 1985-11-20 1987-12-22 Eastman Kodak Company Electrographic magnetic brush development apparatus and system
JPS63136067A (en) * 1986-11-28 1988-06-08 Oki Electric Ind Co Ltd Nonmagnetic single-component developing device
US5227848A (en) * 1992-02-04 1993-07-13 Eastman Kodak Company Developer flow rate regulation for an electrophotographic toning roller
US5752139A (en) * 1995-11-27 1998-05-12 Fuji Xerox Co., Ltd. Dual-component magnetic brush developing device
WO2010117408A2 (en) * 2009-03-31 2010-10-14 Eastman Kodak Company Developer station for an electrographic printer having reduced developer agitation
US8554119B2 (en) 2009-11-25 2013-10-08 Ricoh Company, Ltd. Developing device, image forming apparatus, and process cartridge

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714046A (en) * 1985-11-20 1987-12-22 Eastman Kodak Company Electrographic magnetic brush development apparatus and system
JPS63136067A (en) * 1986-11-28 1988-06-08 Oki Electric Ind Co Ltd Nonmagnetic single-component developing device
US5227848A (en) * 1992-02-04 1993-07-13 Eastman Kodak Company Developer flow rate regulation for an electrophotographic toning roller
US5752139A (en) * 1995-11-27 1998-05-12 Fuji Xerox Co., Ltd. Dual-component magnetic brush developing device
WO2010117408A2 (en) * 2009-03-31 2010-10-14 Eastman Kodak Company Developer station for an electrographic printer having reduced developer agitation
WO2010117408A3 (en) * 2009-03-31 2011-01-06 Eastman Kodak Company Developer station for an electrographic printer having reduced developer agitation
US8290409B2 (en) 2009-03-31 2012-10-16 Eastman Kodak Company Developer station for an electrographic printer having reduced developer agitation
US8554119B2 (en) 2009-11-25 2013-10-08 Ricoh Company, Ltd. Developing device, image forming apparatus, and process cartridge

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