EP0542276A3 - Developing unit - Google Patents

Developing unit Download PDF

Info

Publication number
EP0542276A3
EP0542276A3 EP19920119383 EP92119383A EP0542276A3 EP 0542276 A3 EP0542276 A3 EP 0542276A3 EP 19920119383 EP19920119383 EP 19920119383 EP 92119383 A EP92119383 A EP 92119383A EP 0542276 A3 EP0542276 A3 EP 0542276A3
Authority
EP
European Patent Office
Prior art keywords
developing unit
developing
unit
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.)
Granted
Application number
EP19920119383
Other versions
EP0542276B1 (en
EP0542276A2 (en
Inventor
Keiji Kato
Katsuzo Uchida
Yasuo Imai
Yukinori Andou
Takashi Sugito
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of EP0542276A2 publication Critical patent/EP0542276A2/en
Publication of EP0542276A3 publication Critical patent/EP0542276A3/en
Application granted granted Critical
Publication of EP0542276B1 publication Critical patent/EP0542276B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • 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
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • 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
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0853—Detection or control means for the developer concentration the concentration being measured by magnetic means
    • 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
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0887—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity
    • G03G15/0889—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity for agitation or stirring
    • 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
    • G03G15/0896—Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
EP19920119383 1991-11-15 1992-11-12 Developing unit Expired - Lifetime EP0542276B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3300025A JPH05134547A (en) 1991-11-15 1991-11-15 Developing device
JP300025/91 1991-11-15

Publications (3)

Publication Number Publication Date
EP0542276A2 EP0542276A2 (en) 1993-05-19
EP0542276A3 true EP0542276A3 (en) 1993-09-22
EP0542276B1 EP0542276B1 (en) 1996-06-12

Family

ID=17879804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920119383 Expired - Lifetime EP0542276B1 (en) 1991-11-15 1992-11-12 Developing unit

Country Status (3)

Country Link
EP (1) EP0542276B1 (en)
JP (1) JPH05134547A (en)
DE (1) DE69211493T2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002214890A (en) * 2001-01-12 2002-07-31 Ricoh Co Ltd Developing device
JP5396700B2 (en) * 2007-08-22 2014-01-22 コニカミノルタ株式会社 Image forming apparatus and fog elimination method
JP5251907B2 (en) * 2010-03-16 2013-07-31 コニカミノルタビジネステクノロジーズ株式会社 Image forming apparatus
JP5402973B2 (en) * 2011-04-20 2014-01-29 コニカミノルタ株式会社 Image forming apparatus
KR20200107451A (en) 2019-03-08 2020-09-16 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. Controlling amount of developer by using output waveform obtained from toner concentration sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974025A (en) * 1988-08-31 1990-11-27 Kyocera Corporation Method of controlling toner concentration in electrophotographic developing apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974025A (en) * 1988-08-31 1990-11-27 Kyocera Corporation Method of controlling toner concentration in electrophotographic developing apparatus

Also Published As

Publication number Publication date
JPH05134547A (en) 1993-05-28
EP0542276B1 (en) 1996-06-12
DE69211493D1 (en) 1996-07-18
EP0542276A2 (en) 1993-05-19
DE69211493T2 (en) 1997-01-30

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