JPS6224790B2 - - Google Patents

Info

Publication number
JPS6224790B2
JPS6224790B2 JP8468878A JP8468878A JPS6224790B2 JP S6224790 B2 JPS6224790 B2 JP S6224790B2 JP 8468878 A JP8468878 A JP 8468878A JP 8468878 A JP8468878 A JP 8468878A JP S6224790 B2 JPS6224790 B2 JP S6224790B2
Authority
JP
Japan
Prior art keywords
coil
developer
toner concentration
bulk density
toner
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
JP8468878A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5511254A (en
Inventor
Tsukasa Adachi
Makoto Kobu
Yasushi Furuichi
Kunio Kudo
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 Ltd filed Critical Ricoh Co Ltd
Priority to JP8468878A priority Critical patent/JPS5511254A/ja
Publication of JPS5511254A publication Critical patent/JPS5511254A/ja
Publication of JPS6224790B2 publication Critical patent/JPS6224790B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Dry Development In Electrophotography (AREA)
JP8468878A 1978-07-11 1978-07-11 Toner concentration detector Granted JPS5511254A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8468878A JPS5511254A (en) 1978-07-11 1978-07-11 Toner concentration detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8468878A JPS5511254A (en) 1978-07-11 1978-07-11 Toner concentration detector

Publications (2)

Publication Number Publication Date
JPS5511254A JPS5511254A (en) 1980-01-26
JPS6224790B2 true JPS6224790B2 (enrdf_load_stackoverflow) 1987-05-29

Family

ID=13837608

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8468878A Granted JPS5511254A (en) 1978-07-11 1978-07-11 Toner concentration detector

Country Status (1)

Country Link
JP (1) JPS5511254A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57165748A (en) * 1981-04-06 1982-10-12 Fujitsu Ltd Detection circuit of quantity of toner
JP6645171B2 (ja) * 2015-12-17 2020-02-14 日立金属株式会社 透磁率センサ及び透磁率検出方法
JP2019117251A (ja) * 2017-12-27 2019-07-18 京セラドキュメントソリューションズ株式会社 画像形成装置

Also Published As

Publication number Publication date
JPS5511254A (en) 1980-01-26

Similar Documents

Publication Publication Date Title
US4147127A (en) Toner concentration detecting apparatus
US4245711A (en) Weighing apparatus including a tapped electromagnetic load compensation coil
EP0380562B1 (en) Magnetometer employing a saturable core inductor
US3812428A (en) Method of and apparatus for the measuring of direct current
EP0365603A1 (en) Single-winding magnetometer
US5623205A (en) Method and apparatus for measuring a magnetic field using a magnetic force microscope by magnetizing a probe and correcting a detected magnetic field
EP0029710B1 (en) Toner concentration detecting apparatus
JPS6224790B2 (enrdf_load_stackoverflow)
JPS5726879A (en) Control device for replenishing of developer
US6078172A (en) Current-compensated current sensor for hysteresis-independent and temperature-independent current measurement
JPS55121459A (en) Developer supervising device
US3638495A (en) Method for detecting aging of articles
US3233171A (en) Apparatus for detecting the presence, magnitude and direction of magnetic fields utilizing saturable magnetic core energized by alternating current
JPS602599Y2 (ja) トナ−濃度検出装置
JPS5633521A (en) Device for measuring stress
US5187522A (en) Magnetic monitor for measuring toner concentration
US4958523A (en) Apparatus for measuring the flow rate of electrically conductive liquids
JPS63149675A (ja) トナ−濃度センサの取付構造
US11573280B2 (en) Coil assembly for compensation current sensor
JP2000346920A (ja) 透磁率測定装置および透磁率測定方法
SU508734A1 (ru) Вихретоковый накладной преобразователь
JPS6018062B2 (ja) トナ−コントロ−ル装置
RU1830135C (ru) Электромагнитный расходомер
US4393349A (en) Asymmetrical SQUID
JPS568575A (en) Magnetism tester