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JPS5838162U - Toner concentration detection circuit - Google Patents

Toner concentration detection circuit

Info

Publication number
JPS5838162U
JPS5838162UJP13307981UJP13307981UJPS5838162UJP S5838162 UJPS5838162 UJP S5838162UJP 13307981 UJP13307981 UJP 13307981UJP 13307981 UJP13307981 UJP 13307981UJP S5838162 UJPS5838162 UJP S5838162U
Authority
JP
Japan
Prior art keywords
detection circuit
toner concentration
concentration detection
toner
changes according
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.)
Pending
Application number
JP13307981U
Other languages
Japanese (ja)
Inventor
正己 樋口
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co LtdfiledCriticalRicoh Co Ltd
Priority to JP13307981UpriorityCriticalpatent/JPS5838162U/en
Publication of JPS5838162UpublicationCriticalpatent/JPS5838162U/en
Pendinglegal-statusCriticalCurrent

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Abstract

Translated fromJapanese

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Translated fromJapanese
【図面の簡単な説明】[Brief explanation of the drawing]

添付図面は本考案の１実施例を示す現像装置の側断面図
及びそれに付設されるトナー濃度検出回路の回路図であ
る。１７・・・・・・検知コイル、１９・・・・・・発振回
路（検知発振回路）、２３・・・・・・タイマ、２４．
２５・・・・・・カウンタ、２６・・・・・・比較回路
。The accompanying drawings are a side sectional view of a developing device and a circuit diagram of a toner concentration detection circuit attached thereto, showing one embodiment of the present invention. 17...Detection coil, 19...Oscillation circuit (detection oscillation circuit), 23...Timer, 24.
25...Counter, 26...Comparison circuit.

Claims (1)

Translated fromJapanese
【実用新案登録請求の範囲】[Scope of utility model registration request]通過するトナーの量に従ってインダクタンスが変化する
検知コイルを含む発振回路を備え、検知コイルのインダ
クタンスの変化に従って変化する発振周波数に基づいて
トナー補給信号を発生するトナー濃度検出回路において
、上記発振周波数をデジタル処理することを特徴とする
トナー濃度検出回路。The toner concentration detection circuit includes an oscillation circuit including a detection coil whose inductance changes according to the amount of toner passing through, and generates a toner replenishment signal based on the oscillation frequency that changes according to the change in the inductance of the detection coil. A toner concentration detection circuit characterized by processing.
JP13307981U1981-09-091981-09-09 Toner concentration detection circuitPendingJPS5838162U (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP13307981UJPS5838162U (en)1981-09-091981-09-09 Toner concentration detection circuit

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP13307981UJPS5838162U (en)1981-09-091981-09-09 Toner concentration detection circuit

Publications (1)

Publication NumberPublication Date
JPS5838162Utrue JPS5838162U (en)1983-03-12

Family

ID=29926558

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP13307981UPendingJPS5838162U (en)1981-09-091981-09-09 Toner concentration detection circuit

Country Status (1)

CountryLink
JP (1)JPS5838162U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS6375770A (en)*1986-09-191988-04-06Ricoh Co Ltd Toner density control device
WO2005093403A1 (en)*2004-03-262005-10-06Diesel United, Ltd.Magnetic substance concentration measuring apparatus, determination sensitivity improving method, zero-point compensation method, and zero-point correction method
JP2005299459A (en)*2004-04-092005-10-27Diesel United:KkEngine
JP2016106261A (en)*2016-02-052016-06-16コニカミノルタ株式会社Image forming apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5119540A (en)*1974-07-171976-02-16Savin Business Machines Corp Choshokuzainonodokanshi oyobi hokyusochi
JPS5643556A (en)*1979-09-191981-04-22Toshiba CorpConcentration control device of developer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5119540A (en)*1974-07-171976-02-16Savin Business Machines Corp Choshokuzainonodokanshi oyobi hokyusochi
JPS5643556A (en)*1979-09-191981-04-22Toshiba CorpConcentration control device of developer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS6375770A (en)*1986-09-191988-04-06Ricoh Co Ltd Toner density control device
WO2005093403A1 (en)*2004-03-262005-10-06Diesel United, Ltd.Magnetic substance concentration measuring apparatus, determination sensitivity improving method, zero-point compensation method, and zero-point correction method
JP2005299459A (en)*2004-04-092005-10-27Diesel United:KkEngine
WO2005100757A1 (en)*2004-04-092005-10-27Diesel United, Ltd.Motion engine
JP2016106261A (en)*2016-02-052016-06-16コニカミノルタ株式会社Image forming apparatus

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