JPS5670442A - Controlling device for density of toner - Google Patents

Controlling device for density of toner

Info

Publication number
JPS5670442A
JPS5670442A JP14754579A JP14754579A JPS5670442A JP S5670442 A JPS5670442 A JP S5670442A JP 14754579 A JP14754579 A JP 14754579A JP 14754579 A JP14754579 A JP 14754579A JP S5670442 A JPS5670442 A JP S5670442A
Authority
JP
Japan
Prior art keywords
light
toner
density
photoreceiving
reflected
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
JP14754579A
Other languages
English (en)
Inventor
Koji Hirakura
Yasuo Sawada
Kenta Watase
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 JP14754579A priority Critical patent/JPS5670442A/ja
Priority to US06/172,240 priority patent/US4389972A/en
Priority to DE3029514A priority patent/DE3029514C2/de
Publication of JPS5670442A publication Critical patent/JPS5670442A/ja
Pending 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
    • G01N21/55—Specular reflectivity

Landscapes

  • Physics & Mathematics (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 Analysing Materials By Optical Means (AREA)
  • Dry Development In Electrophotography (AREA)
JP14754579A 1979-08-04 1979-11-14 Controlling device for density of toner Pending JPS5670442A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP14754579A JPS5670442A (en) 1979-11-14 1979-11-14 Controlling device for density of toner
US06/172,240 US4389972A (en) 1979-08-04 1980-07-25 Toner concentration control apparatus
DE3029514A DE3029514C2 (de) 1979-08-04 1980-08-04 Einrichtung zur Einstellung der Tonerkonzentration in einem elektrofotografischen Kopiergerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14754579A JPS5670442A (en) 1979-11-14 1979-11-14 Controlling device for density of toner

Publications (1)

Publication Number Publication Date
JPS5670442A true JPS5670442A (en) 1981-06-12

Family

ID=15432737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14754579A Pending JPS5670442A (en) 1979-08-04 1979-11-14 Controlling device for density of toner

Country Status (1)

Country Link
JP (1) JPS5670442A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125340A2 (en) * 1982-11-01 1984-11-21 Miles Inc. Apparatus for measuring nonspecular reflected light
JPS62209476A (ja) * 1986-03-10 1987-09-14 Minolta Camera Co Ltd 電子写真複写機における画像濃度制御方法
JPH03120465A (ja) * 1989-10-02 1991-05-22 Fuji Photo Film Co Ltd 免疫測定装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5165660A (ja) * 1974-12-03 1976-06-07 Fujitsu Ltd
JPS53107853A (en) * 1977-03-02 1978-09-20 Canon Inc Concentration detection method of developer
JPS5477090A (en) * 1977-12-01 1979-06-20 Toshiba Corp Semiconductor photo detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5165660A (ja) * 1974-12-03 1976-06-07 Fujitsu Ltd
JPS53107853A (en) * 1977-03-02 1978-09-20 Canon Inc Concentration detection method of developer
JPS5477090A (en) * 1977-12-01 1979-06-20 Toshiba Corp Semiconductor photo detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125340A2 (en) * 1982-11-01 1984-11-21 Miles Inc. Apparatus for measuring nonspecular reflected light
JPS62209476A (ja) * 1986-03-10 1987-09-14 Minolta Camera Co Ltd 電子写真複写機における画像濃度制御方法
JPH03120465A (ja) * 1989-10-02 1991-05-22 Fuji Photo Film Co Ltd 免疫測定装置

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