JPS6413171A - Toner density detector - Google Patents

Toner density detector

Info

Publication number
JPS6413171A
JPS6413171A JP16791787A JP16791787A JPS6413171A JP S6413171 A JPS6413171 A JP S6413171A JP 16791787 A JP16791787 A JP 16791787A JP 16791787 A JP16791787 A JP 16791787A JP S6413171 A JPS6413171 A JP S6413171A
Authority
JP
Japan
Prior art keywords
light source
sensor
toner density
light
window
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
JP16791787A
Other languages
Japanese (ja)
Inventor
Tatsuya Tada
Takashi Osawa
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP16791787A priority Critical patent/JPS6413171A/en
Publication of JPS6413171A publication Critical patent/JPS6413171A/en
Pending 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
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To always detect an exact toner density even at the time of rising light emission of a lamp, by providing a filter having about the same characteristic as that of a window between a light source and a second sensor. CONSTITUTION:The titled device is provided with a light source 22 for radiating a light beam to a developer of the inside from a window 21 formed by a transparent material, a first sensor 23 for photodetecting a reflected light which is reflected by its developer, and a second sensor 24 for photodetecting directly the light beam of the light source 22. Also, between the light source 22 and the second sensor 24, a filter having about the same characteristic as that of the window 21 is provided. In such a way, even at the time of rising light emission of the light source 22, the toner density can be detected exactly.
JP16791787A 1987-07-07 1987-07-07 Toner density detector Pending JPS6413171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16791787A JPS6413171A (en) 1987-07-07 1987-07-07 Toner density detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16791787A JPS6413171A (en) 1987-07-07 1987-07-07 Toner density detector

Publications (1)

Publication Number Publication Date
JPS6413171A true JPS6413171A (en) 1989-01-18

Family

ID=15858446

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16791787A Pending JPS6413171A (en) 1987-07-07 1987-07-07 Toner density detector

Country Status (1)

Country Link
JP (1) JPS6413171A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5072874A (en) * 1991-01-31 1991-12-17 Microelectronics And Computer Technology Corporation Method and apparatus for using desoldering material
US10201442B2 (en) 2013-03-14 2019-02-12 Spiration, Inc. Valve loader method, system, and apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53107853A (en) * 1977-03-02 1978-09-20 Canon Inc Concentration detection method of developer
JPS5651646A (en) * 1979-10-02 1981-05-09 Ricoh Co Ltd Toner concentration sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53107853A (en) * 1977-03-02 1978-09-20 Canon Inc Concentration detection method of developer
JPS5651646A (en) * 1979-10-02 1981-05-09 Ricoh Co Ltd Toner concentration sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5072874A (en) * 1991-01-31 1991-12-17 Microelectronics And Computer Technology Corporation Method and apparatus for using desoldering material
US10201442B2 (en) 2013-03-14 2019-02-12 Spiration, Inc. Valve loader method, system, and apparatus

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