EP0311020A3 - Angular positioning of magnets in a developer roller used in electrophotographic apparatus or the like - Google Patents

Angular positioning of magnets in a developer roller used in electrophotographic apparatus or the like Download PDF

Info

Publication number
EP0311020A3
EP0311020A3 EP19880116411 EP88116411A EP0311020A3 EP 0311020 A3 EP0311020 A3 EP 0311020A3 EP 19880116411 EP19880116411 EP 19880116411 EP 88116411 A EP88116411 A EP 88116411A EP 0311020 A3 EP0311020 A3 EP 0311020A3
Authority
EP
European Patent Office
Prior art keywords
magnets
developer roller
electrophotographic apparatus
angular positioning
roller used
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.)
Withdrawn
Application number
EP19880116411
Other languages
German (de)
French (fr)
Other versions
EP0311020A2 (en
Inventor
Yukio C/O Fujitsu Limited Nishio
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0311020A2 publication Critical patent/EP0311020A2/en
Publication of EP0311020A3 publication Critical patent/EP0311020A3/en
Withdrawn legal-status Critical Current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
    • 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

Abstract

An extended portion of an axle (9) supporting magnets (10a) in a developer roller (4) is provided with a gear (27) and a lever plate (28). A magnetic sensor (91), such as a Hall element, is arranged in place of a photosensitive drum (1) where there is the narrowest gap between the developer roller (4) and the photosensitive drum (1). The sensor (91) detects the magnetic field of the magnets (10a) while the magnets are rotated by an external drive (93, 94) via the gear (27). At an angular position of the magnets (10a) where a peak of magnetic field of a particular magnet pole (N₁) facing the drum (1) is detected, the lever plate (28) is fixed to a frame (25), which rotatably supports the axle (9), of a developer unit including the developer roller (4) by, for example, fastening a screw (30) on the frame. Accordingly, the angular position of the magnets (10a) can be adjusted easily and accurately enough to achieve quality printing.
EP19880116411 1987-10-05 1988-10-04 Angular positioning of magnets in a developer roller used in electrophotographic apparatus or the like Withdrawn EP0311020A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62249759A JPH0192777A (en) 1987-10-05 1987-10-05 Adjusting method for position of magnet roller
JP249759/87 1987-10-05

Publications (2)

Publication Number Publication Date
EP0311020A2 EP0311020A2 (en) 1989-04-12
EP0311020A3 true EP0311020A3 (en) 1990-11-28

Family

ID=17197806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880116411 Withdrawn EP0311020A3 (en) 1987-10-05 1988-10-04 Angular positioning of magnets in a developer roller used in electrophotographic apparatus or the like

Country Status (3)

Country Link
EP (1) EP0311020A3 (en)
JP (1) JPH0192777A (en)
KR (1) KR920007719B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0328860A (en) * 1989-06-27 1991-02-07 Mita Ind Co Ltd High-definition development method
US5315325A (en) * 1991-08-20 1994-05-24 Recycling Technologies International Corporation Laser printer cartridges
JP3382447B2 (en) * 1996-02-16 2003-03-04 キヤノン株式会社 Process cartridge and method of manufacturing the same
US6862415B2 (en) 2001-06-27 2005-03-01 Eastman Kodak Company Device for treating the surface of an article in connection with printing
KR101474730B1 (en) * 2008-04-30 2014-12-22 삼성전자주식회사 Developing apparatus for image forming apparatus, Image forming apparatus having the same, Method for preventing developer from flowing out the developing apparatus
KR102212610B1 (en) * 2020-01-08 2021-02-04 김용휘 A method of automatically mounting magnets on a cosmetic container

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4279942A (en) * 1980-03-03 1981-07-21 Eastman Kodak Company Magnetic field adjustment for magnetic brushes
EP0182930A1 (en) * 1984-11-26 1986-06-04 Max Baermann G.M.B.H. Magnetic rolls for copier machines and method of making the same
JPS62196688A (en) * 1986-02-24 1987-08-31 Sharp Corp Device for adjusting and assembling developing tank of copying device
JPS62196687A (en) * 1986-02-24 1987-08-31 Sharp Corp Method for adjusting main pole position of developing tank magnet roller in copying machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2448354C3 (en) * 1974-10-10 1978-12-21 Bergwerksverband Gmbh, 4300 Essen Fluidized bed reactor for the generation of steam, combustible gases and liquid by-products from coal
JPS5232337A (en) * 1975-09-08 1977-03-11 K I P:Kk Development device for the electrophotographic copying machine
JPS6059277B2 (en) * 1976-03-12 1985-12-24 ヴセソユズニイ ナウチノ−イススレドヴアテルスキイ インステイテユト イスポルゾヴアニア ガザ ヴ ナロドノムホズヤイストヴエ，ポドゼムノゴ フラネニア ネフテイ，ネフテプ ドウクトフ イ スジイジエンニイフガゾフ“ヴニイプロムガズ” Underground gasification method for coal beds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4279942A (en) * 1980-03-03 1981-07-21 Eastman Kodak Company Magnetic field adjustment for magnetic brushes
EP0182930A1 (en) * 1984-11-26 1986-06-04 Max Baermann G.M.B.H. Magnetic rolls for copier machines and method of making the same
JPS62196688A (en) * 1986-02-24 1987-08-31 Sharp Corp Device for adjusting and assembling developing tank of copying device
JPS62196687A (en) * 1986-02-24 1987-08-31 Sharp Corp Method for adjusting main pole position of developing tank magnet roller in copying machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 1, no. 98, 31st August 1977, page 2949 E 77; & JP-A-52 32 337 (K.I.P. K.K.) 11-03-1977 *

Also Published As

Publication number Publication date
KR920007719B1 (en) 1992-09-15
EP0311020A2 (en) 1989-04-12
JPH0192777A (en) 1989-04-12
KR890007134A (en) 1989-06-19

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