JPH0151770B2 - - Google Patents

Info

Publication number
JPH0151770B2
JPH0151770B2 JP56057633A JP5763381A JPH0151770B2 JP H0151770 B2 JPH0151770 B2 JP H0151770B2 JP 56057633 A JP56057633 A JP 56057633A JP 5763381 A JP5763381 A JP 5763381A JP H0151770 B2 JPH0151770 B2 JP H0151770B2
Authority
JP
Japan
Prior art keywords
toner
developer
toner concentration
photoelectric
signal
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.)
Expired
Application number
JP56057633A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57172235A (en
Inventor
Masaharu Nishikawa
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP56057633A priority Critical patent/JPS57172235A/ja
Priority to US06/369,084 priority patent/US4550998A/en
Publication of JPS57172235A publication Critical patent/JPS57172235A/ja
Publication of JPH0151770B2 publication Critical patent/JPH0151770B2/ja
Granted 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
    • 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
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
    • 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
    • G03G2215/08—Details of powder developing device not concerning the development directly
    • G03G2215/0888—Arrangements for detecting toner level or concentration in the developing device
    • G03G2215/0891—Optical detection
    • G03G2215/0894—Optical detection through a light transmissive window in the developer container wall
    • G03G2215/0897—Cleaning of the light transmissive window

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Dry Development In Electrophotography (AREA)
  • Optical Measuring Cells (AREA)
JP56057633A 1981-04-16 1981-04-16 Detector for toner density Granted JPS57172235A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56057633A JPS57172235A (en) 1981-04-16 1981-04-16 Detector for toner density
US06/369,084 US4550998A (en) 1981-04-16 1982-04-16 Toner concentration detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057633A JPS57172235A (en) 1981-04-16 1981-04-16 Detector for toner density

Publications (2)

Publication Number Publication Date
JPS57172235A JPS57172235A (en) 1982-10-23
JPH0151770B2 true JPH0151770B2 (https=) 1989-11-06

Family

ID=13061293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057633A Granted JPS57172235A (en) 1981-04-16 1981-04-16 Detector for toner density

Country Status (2)

Country Link
US (1) US4550998A (https=)
JP (1) JPS57172235A (https=)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024569A (ja) * 1983-07-21 1985-02-07 Fuji Xerox Co Ltd 反射型カラ−トナ−濃度検出装置
DE3678618D1 (de) * 1985-06-13 1991-05-16 Matsushita Electric Industrial Co Ltd Entwicklungsvorrichtung.
JPS62127648A (ja) * 1985-11-28 1987-06-09 Canon Inc 二成分現像剤の濃度検出方法
US4671646A (en) * 1986-02-04 1987-06-09 Eastman Kodak Company Toner monitor control mechanism
JPS62229170A (ja) * 1986-03-29 1987-10-07 Toshiba Corp 画像形成装置
JPS62293267A (ja) * 1986-06-13 1987-12-19 Fujitsu Ltd 現像装置
US4786942A (en) * 1986-08-09 1988-11-22 Minolta Camera Kabushiki Kaisha Image forming apparatus
JPS6339249U (https=) * 1986-08-29 1988-03-14
US4883019A (en) * 1987-01-19 1989-11-28 Canon Kabushiki Kaisha Image forming apparatus having developer content detector
US4873549A (en) * 1987-03-03 1989-10-10 Mita Industrial Co., Ltd. Device for detecting the life of an image forming process unit, opening of a seal of the unit and attachment of the unit to an image forming apparatus
JP2582363B2 (ja) * 1987-03-19 1997-02-19 株式会社リコー 多色現像装置の画像濃度検出機構
JP2814243B2 (ja) * 1987-10-20 1998-10-22 キヤノン 株式会社 現像装置
US4924263A (en) * 1989-04-10 1990-05-08 Xerox Corporation Quality control for magnetic images
JP3027161B2 (ja) * 1989-07-14 2000-03-27 株式会社リコー 画像形成装置における画像濃度検知装置
JP2974334B2 (ja) * 1989-08-31 1999-11-10 キヤノン株式会社 現像装置
JP2897342B2 (ja) * 1990-05-15 1999-05-31 ミノルタ株式会社 現像装置
JP3023009B2 (ja) * 1991-05-14 2000-03-21 ミノルタ株式会社 光学式トナー濃度検出方法におけるトラブル検出方法
US5383007A (en) * 1991-05-14 1995-01-17 Minolta Camera Kabushiki Kaisha Apparatus for measuring developer density by reflected light from the developer illuminated through a detection window
JPH05119567A (ja) * 1991-10-29 1993-05-18 Toshiba Corp 画像形成装置
US5398099A (en) * 1992-09-24 1995-03-14 Kabushiki Kaisha Toshiba Image forming apparatus with bias means for preventing toner particles from clouding optical components
DE69637378T2 (de) * 1995-04-20 2009-01-02 Ricoh Co., Ltd. Entwicklungsgerät für eine Mischung aus Toner- und Trägerteilchen
US5933684A (en) * 1998-01-08 1999-08-03 Xerox Corporation Interactivity sensor for electrophotographic printing
US6006668A (en) * 1998-04-20 1999-12-28 Hewlett-Packard Company Glossy or matte-finish media detector and method for use in a printing device
US6184991B1 (en) 1999-04-19 2001-02-06 Hewlett-Packard Apparatus and method of measuring dry time of printing composition
JP2001116686A (ja) * 1999-10-18 2001-04-27 Nec Niigata Ltd トナー濃度検知センサ
US6628398B1 (en) 2000-11-01 2003-09-30 Lexmark International, Inc. Toner patch sensor with integrating optical collection geometry
KR100488449B1 (ko) * 2002-09-12 2005-05-11 엘지전자 주식회사 플라즈마 디스플레이 패널
US7329990B2 (en) * 2002-12-27 2008-02-12 Lg Electronics Inc. Plasma display panel having different sized electrodes and/or gaps between electrodes
US6931219B2 (en) * 2003-06-26 2005-08-16 Xerox Corporation Led color specific optical toner concentration sensor
JP2007256447A (ja) * 2006-03-22 2007-10-04 Kyocera Mita Corp 現像剤劣化の検知方法及びこれを用いた画像形成装置
JP2009053442A (ja) * 2007-08-27 2009-03-12 Mitsubishi Heavy Ind Ltd 液体トナーの濃度計測装置及び方法
JP5025410B2 (ja) * 2007-10-04 2012-09-12 キヤノン株式会社 画像形成装置
JP5247217B2 (ja) * 2008-04-14 2013-07-24 キヤノン株式会社 画像形成装置
JP5252015B2 (ja) * 2011-03-18 2013-07-31 ブラザー工業株式会社 印刷装置
JP5982875B2 (ja) * 2012-02-29 2016-08-31 富士ゼロックス株式会社 光量検出装置及び画像形成装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765654A (en) * 1968-10-17 1973-10-16 Continental Can Co System for measuring and controlling mixture content
JPS6019504B2 (ja) * 1976-04-23 1985-05-16 キヤノン株式会社 現像剤の濃度調整方法及びその装置
JPS607792B2 (ja) * 1977-03-02 1985-02-27 キヤノン株式会社 現像剤の濃度検出方法
US4347299A (en) * 1978-08-16 1982-08-31 Minolta Camera Kabushiki Kaisha Method of controlling toner concentration for electrophotographic copying apparatus
JPS55111240U (https=) * 1979-01-31 1980-08-05
US4346985A (en) * 1979-06-25 1982-08-31 Xerox Corporation Automatic development control
JPS5624376A (en) * 1979-08-04 1981-03-07 Ricoh Co Ltd Toner concentration control unit of developer
JPS5667871A (en) * 1979-11-07 1981-06-08 Ricoh Co Ltd Toner concentration control unit
US4431300A (en) * 1982-02-16 1984-02-14 Xerox Corporation Automatic developability sensing in electrophotographic printing

Also Published As

Publication number Publication date
US4550998A (en) 1985-11-05
JPS57172235A (en) 1982-10-23

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