WO1990016018A1 - Developing apparatus - Google Patents

Developing apparatus Download PDF

Info

Publication number
WO1990016018A1
WO1990016018A1 PCT/JP1990/000809 JP9000809W WO9016018A1 WO 1990016018 A1 WO1990016018 A1 WO 1990016018A1 JP 9000809 W JP9000809 W JP 9000809W WO 9016018 A1 WO9016018 A1 WO 9016018A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
transfer member
developer
roller
developing apparatus
Prior art date
Application number
PCT/JP1990/000809
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshiro Koga
Tahei Ishiwatari
Yoshihiro Nakashima
Takashi Hama
Original Assignee
Seiko Epson Corporation
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 Seiko Epson Corporation filed Critical Seiko Epson Corporation
Priority to JP02509054A priority Critical patent/JP3120451B2/en
Publication of WO1990016018A1 publication Critical patent/WO1990016018A1/en

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0231—Magnetic circuits with PM for power or force generation
    • H01F7/0252—PM holding devices
    • H01F7/0268—Magnetic cylinders
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/0602—Developer
    • G03G2215/0604—Developer solid type
    • G03G2215/0607—Developer solid type two-component
    • G03G2215/0609—Developer solid type two-component magnetic brush

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

A magnetic brush developing apparatus which comprises a nonmagnetic conductive cylindrical developer transfer member and a magnetic roller having a plurality of magnetic poles and disposed inside the developer transfer member, and which transfers the developer on the developer transfer member in accordance with the magnetic field generated by the relative rotation of the transfer member and the roller, wherein the magnetic roller consists of a magnet having a maximum energy product of at least 4 MGOe. It becomes possible to use a fine developer containing a small quantity of magnetic powder and to develop a high quality, full-line color image.
PCT/JP1990/000809 1989-06-21 1990-06-20 Developing apparatus WO1990016018A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP02509054A JP3120451B2 (en) 1989-06-21 1990-06-20 Developing device

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP1/158920 1989-06-21
JP15892089 1989-06-21
JP1/172332 1989-07-04
JP17233289 1989-07-04
JP17950689 1989-07-12
JP17951789 1989-07-12
JP1/179520 1989-07-12
JP1/179506 1989-07-12
JP17952089 1989-07-12
JP1/179517 1989-07-12

Publications (1)

Publication Number Publication Date
WO1990016018A1 true WO1990016018A1 (en) 1990-12-27

Family

ID=27528182

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1990/000809 WO1990016018A1 (en) 1989-06-21 1990-06-20 Developing apparatus

Country Status (3)

Country Link
EP (1) EP0429682A1 (en)
JP (1) JP3120451B2 (en)
WO (1) WO1990016018A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5691682A (en) * 1995-01-10 1997-11-25 Eastman Kodak Company Very high field micro magnetic roller and method of making same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60216512A (en) * 1984-04-12 1985-10-30 Seiko Epson Corp Magnet for magnetic roll

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60216512A (en) * 1984-04-12 1985-10-30 Seiko Epson Corp Magnet for magnetic roll

Also Published As

Publication number Publication date
EP0429682A1 (en) 1991-06-05
JP3120451B2 (en) 2000-12-25

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