JPS5511254A - Toner concentration detector - Google Patents

Toner concentration detector

Info

Publication number
JPS5511254A
JPS5511254A JP8468878A JP8468878A JPS5511254A JP S5511254 A JPS5511254 A JP S5511254A JP 8468878 A JP8468878 A JP 8468878A JP 8468878 A JP8468878 A JP 8468878A JP S5511254 A JPS5511254 A JP S5511254A
Authority
JP
Japan
Prior art keywords
coils
vessel
toner
orifice
tubular body
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
JP8468878A
Other languages
Japanese (ja)
Other versions
JPS6224790B2 (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/en
Publication of JPS5511254A publication Critical patent/JPS5511254A/en
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 Electric Means (AREA)
  • Dry Development In Electrophotography (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

PURPOSE:To eliminate arithmetic circuits and make control values of toner concentrations constant by winding coils to a flowability measuring vessel and a bulk density measuring vessel respectively and serially connecting these coils. CONSTITUTION:A hole 9 is formed to a part of a flow-down plate 8 on which developer 7 flows down, below the former of which are provided two vessels 10, 11. The vessel 11 is for measuring bulk densities and consists of a tubular body 13 having an orifice 12 of the specified diameter. The vessel 10 is positioned below the orifice 12 and consists of a tubular body 14 of the specified inside diameter. Coils 15, 16 are wound respectively on the outside circumferences of the tubular bodies 14, 13. The coils 15, 16 are connected in series and both ends thereof are connected to an oscillating circuit 17. An adder 19 connected to a reference oscillation circuit 18 is connected to this oscillation circuit 17 and behind this are subsequently connected circuits 20 thru 23 of integral amplification, detection, DC amplification and comparison as well as a toner-replenishing solenoid 24. Thereby, the control values of toner concentrations may be made constant.
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 true JPS5511254A (en) 1980-01-26
JPS6224790B2 JPS6224790B2 (en) 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 (en)

Cited By (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
JP2017111051A (en) * 2015-12-17 2017-06-22 日立金属株式会社 Permeability sensor and permeability detection method
JP2019117251A (en) * 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 Image forming apparatus

Cited By (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
JP2017111051A (en) * 2015-12-17 2017-06-22 日立金属株式会社 Permeability sensor and permeability detection method
JP2019117251A (en) * 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 Image forming apparatus

Also Published As

Publication number Publication date
JPS6224790B2 (en) 1987-05-29

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