JPS642081A - Developing device - Google Patents

Developing device

Info

Publication number
JPS642081A
JPS642081A JP15653687A JP15653687A JPS642081A JP S642081 A JPS642081 A JP S642081A JP 15653687 A JP15653687 A JP 15653687A JP 15653687 A JP15653687 A JP 15653687A JP S642081 A JPS642081 A JP S642081A
Authority
JP
Japan
Prior art keywords
poles
pole
scooping
surely
sleeve
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
JP15653687A
Other languages
Japanese (ja)
Other versions
JPH012081A (en
Inventor
Hideo Yuu
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 JP62-156536A priority Critical patent/JPH012081A/en
Priority claimed from JP62-156536A external-priority patent/JPH012081A/en
Publication of JPS642081A publication Critical patent/JPS642081A/en
Publication of JPH012081A publication Critical patent/JPH012081A/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 surely detach a residual developer from a sleeve even if the spacing between a main pole and scooping up electrode is decreased by miniaturization by additionally disposing two pieces of intermediate poles and one piece of intermediate conveying pole to respective specific positions. CONSTITUTION:The main pole 12, the scooping up pole 14, the upper conveying pole 15 and the lower conveying pole 13 are disposed in the developing sleeve 3. The 1st and 2nd intermediate poles 16, 17 are further disposed between the lower conveying pole 13 and the scooping up pole 14 in addition to said magnetic poles and are set respectively as N poles. One intermediate conveying pole 18 is provided in the position nearly opposite to the poles 16, 17 and are set as S poles. The shielding of magnetic fields is surely executed between the poles 16 and 17 by disposing such magnetic poles. The residual developer is surely detached from the sleeve 3 even if the spacing between the main pole 12 and the scooping up electrode 14 is narrowed by the miniaturization.
JP62-156536A 1987-06-25 developing device Pending JPH012081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62-156536A JPH012081A (en) 1987-06-25 developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62-156536A JPH012081A (en) 1987-06-25 developing device

Publications (2)

Publication Number Publication Date
JPS642081A true JPS642081A (en) 1989-01-06
JPH012081A JPH012081A (en) 1989-01-06

Family

ID=

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102377A (en) * 1989-09-18 1991-04-26 Fuji Xerox Co Ltd Developing device
EP0901049A3 (en) * 1997-08-26 1999-08-18 Sharp Kabushiki Kaisha Developing apparatus for image forming apparatus
US5991585A (en) * 1997-09-26 1999-11-23 Ricoh Company, Ltd. Developing device for an image forming apparatus and developing roller therefor
JP2009092883A (en) * 2007-10-05 2009-04-30 Sharp Corp Developing device, image forming apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102377A (en) * 1989-09-18 1991-04-26 Fuji Xerox Co Ltd Developing device
EP0901049A3 (en) * 1997-08-26 1999-08-18 Sharp Kabushiki Kaisha Developing apparatus for image forming apparatus
US6041207A (en) * 1997-08-26 2000-03-21 Sharp Kabushiki Kaisha Apparatus for controlling the movement of magnetized developer material in a latent, electrostatic image developing deviced
US5991585A (en) * 1997-09-26 1999-11-23 Ricoh Company, Ltd. Developing device for an image forming apparatus and developing roller therefor
JP2009092883A (en) * 2007-10-05 2009-04-30 Sharp Corp Developing device, image forming apparatus

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