JPS63187160U - - Google Patents

Info

Publication number
JPS63187160U
JPS63187160U JP7486987U JP7486987U JPS63187160U JP S63187160 U JPS63187160 U JP S63187160U JP 7486987 U JP7486987 U JP 7486987U JP 7486987 U JP7486987 U JP 7486987U JP S63187160 U JPS63187160 U JP S63187160U
Authority
JP
Japan
Prior art keywords
toner concentration
concentration detection
detection device
capacitance diode
variable capacitance
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
JP7486987U
Other languages
English (en)
Other versions
JPH0633484Y2 (ja
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 filed Critical
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)
  • Dry Development In Electrophotography (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Description

【図面の簡単な説明】
第１図は本考案に係るトナー濃度検出装置の電
気回路図、第２図は同じく別の実施例における電
気回路図、第３図は第１図に示したトナー濃度検
出装置の更に具体的な各電気回路図、第４図は従
来のトナー濃度検出装置の電気回路図である。 １……トランス、１０１……駆動側コイル、１
０２，１０３……出力側コイル、５……電圧可変
回路、ＶＲ……可変抵抗器、ＶＣＤ可変容量ダイ
オード、ＣＣ……コンデンサ。

Claims (1)

  1. 【実用新案登録請求の範囲】 (1) 差動結線されたトランスの差動出力をトナ
    ー濃度検知信号とするトナー濃度検出装置におい
    て、前記トランスの駆動側コイルと出力側コイル
    との間に接続された可変容量ダイオードと、前記
    可変容量ダイオードに印加される電圧を可変調整
    する電圧可変回路とを備えることを特徴とするト
    ナー濃度検出装置。 (2) 前記駆動側コイルと出力側コイルとの間に
    、前記可変容量ダイオードと直列に、コンデンサ
    を接続したことを特徴とする実用新案登録請求の
    範囲第１項に記載のトナー濃度検出装置。
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 true JPS63187160U (ja) 1988-11-30
JPH0633484Y2 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 (ja)
JP (1) JPH0633484Y2 (ja)
DE (1) DE3877054T2 (ja)

Families Citing this family (2)

* 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
JP5721365B2 (ja) * 2010-08-23 2015-05-20 キヤノン株式会社 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

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
JPS61149859A (ja) * 1984-12-24 1986-07-08 Tdk Corp 磁気的検知装置
JPS61149858A (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
WO1984002202A1 (en) * 1982-11-29 1984-06-07 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
JPS61149859A (ja) * 1984-12-24 1986-07-08 Tdk Corp 磁気的検知装置
JPS61149858A (ja) * 1984-12-24 1986-07-08 Tdk Corp 磁気的検知装置

Also Published As

Publication number Publication date
JPH0633484Y2 (ja) 1994-08-31
DE3877054D1 (de) 1993-02-11
EP0292130A3 (en) 1989-06-14
DE3877054T2 (de) 1993-04-29
EP0292130B1 (en) 1992-12-30
EP0292130A2 (en) 1988-11-23

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