JPH0633484Y2 - トナ−濃度検出装置 - Google Patents

トナ−濃度検出装置

Info

Publication number
JPH0633484Y2
JPH0633484Y2 JP1987074869U JP7486987U JPH0633484Y2 JP H0633484 Y2 JPH0633484 Y2 JP H0633484Y2 JP 1987074869 U JP1987074869 U JP 1987074869U JP 7486987 U JP7486987 U JP 7486987U JP H0633484 Y2 JPH0633484 Y2 JP H0633484Y2
Authority
JP
Japan
Prior art keywords
variable
side coil
circuit
voltage
capacitance diode
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 - Lifetime
Application number
JP1987074869U
Other languages
English (en)
Japanese (ja)
Other versions
JPS63187160U (US20050065096A1-20050324-C00069.png
Inventor
士郎 中川
泰佐 土門
健裕 今井
栄司 ▲高▼橋
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP1987074869U priority Critical patent/JPH0633484Y2/ja
Priority to EP88303863A priority patent/EP0292130B1/en
Priority to DE19883877054 priority patent/DE3877054T2/de
Publication of JPS63187160U publication Critical patent/JPS63187160U/ja
Application granted granted Critical
Publication of JPH0633484Y2 publication Critical patent/JPH0633484Y2/ja
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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Dry Development In Electrophotography (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
JP1987074869U 1987-05-19 1987-05-19 トナ−濃度検出装置 Expired - Lifetime JPH0633484Y2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1987074869U JPH0633484Y2 (ja) 1987-05-19 1987-05-19 トナ−濃度検出装置
EP88303863A EP0292130B1 (en) 1987-05-19 1988-04-28 Toner concentration detection
DE19883877054 DE3877054T2 (de) 1987-05-19 1988-04-28 Tonerkonzentrationsermittlung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987074869U JPH0633484Y2 (ja) 1987-05-19 1987-05-19 トナ−濃度検出装置

Publications (2)

Publication Number Publication Date
JPS63187160U JPS63187160U (US20050065096A1-20050324-C00069.png) 1988-11-30
JPH0633484Y2 true JPH0633484Y2 (ja) 1994-08-31

Family

ID=13559768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987074869U Expired - Lifetime JPH0633484Y2 (ja) 1987-05-19 1987-05-19 トナ−濃度検出装置

Country Status (3)

Country Link
EP (1) EP0292130B1 (US20050065096A1-20050324-C00069.png)
JP (1) JPH0633484Y2 (US20050065096A1-20050324-C00069.png)
DE (1) DE3877054T2 (US20050065096A1-20050324-C00069.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012042420A (ja) * 2010-08-23 2012-03-01 Canon Inc 磁性体粉濃度検知装置及びこの検知装置を用いた画像形成装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5648514A (en) * 1994-12-29 1997-07-15 Allergan Substituted acetylenes having retinoid-like biological activity

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56120045A (en) * 1980-02-16 1981-09-21 Nippon Air Brake Co Detector
JPS5813013A (ja) * 1981-07-17 1983-01-25 Nippon Technical Co Ltd 同調回路
JPS5836018A (ja) * 1981-08-27 1983-03-02 Mitsubishi Electric Corp Ｆｍ受信機
JPS59141817A (ja) * 1983-02-03 1984-08-14 Nippon Technical Co Ltd 同調器
JPS61149858A (ja) * 1984-12-24 1986-07-08 Tdk Corp 磁気的検知装置
JPS61149859A (ja) * 1984-12-24 1986-07-08 Tdk Corp 磁気的検知装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3379182D1 (en) * 1982-11-29 1989-03-16 Hitachi Metals Ltd Apparatus for controlling toner concentration in developer
JPS60154275A (ja) * 1984-01-24 1985-08-13 Hitachi Metals Ltd トナ−センサ−

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56120045A (en) * 1980-02-16 1981-09-21 Nippon Air Brake Co Detector
JPS5813013A (ja) * 1981-07-17 1983-01-25 Nippon Technical Co Ltd 同調回路
JPS5836018A (ja) * 1981-08-27 1983-03-02 Mitsubishi Electric Corp Ｆｍ受信機
JPS59141817A (ja) * 1983-02-03 1984-08-14 Nippon Technical Co Ltd 同調器
JPS61149858A (ja) * 1984-12-24 1986-07-08 Tdk Corp 磁気的検知装置
JPS61149859A (ja) * 1984-12-24 1986-07-08 Tdk Corp 磁気的検知装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012042420A (ja) * 2010-08-23 2012-03-01 Canon Inc 磁性体粉濃度検知装置及びこの検知装置を用いた画像形成装置

Also Published As

Publication number Publication date
EP0292130A3 (en) 1989-06-14
JPS63187160U (US20050065096A1-20050324-C00069.png) 1988-11-30
DE3877054D1 (de) 1993-02-11
EP0292130A2 (en) 1988-11-23
EP0292130B1 (en) 1992-12-30
DE3877054T2 (de) 1993-04-29

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