JPS5773771A - Controlling device for developer concentration - Google Patents

Controlling device for developer concentration

Info

Publication number
JPS5773771A
JPS5773771A JP14965080A JP14965080A JPS5773771A JP S5773771 A JPS5773771 A JP S5773771A JP 14965080 A JP14965080 A JP 14965080A JP 14965080 A JP14965080 A JP 14965080A JP S5773771 A JPS5773771 A JP S5773771A
Authority
JP
Japan
Prior art keywords
developer
concentration
sleeve
peripheral face
developing
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
JP14965080A
Other languages
Japanese (ja)
Inventor
Takahiro Inoue
Takao Aoki
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 JP14965080A priority Critical patent/JPS5773771A/en
Publication of JPS5773771A publication Critical patent/JPS5773771A/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
    • 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
    • G03G15/0877—Arrangements for metering and dispensing developer from a developer cartridge into the development unit

Landscapes

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

Abstract

PURPOSE:To maintain concentration of developer uniform and enable good developing at all times by detecting the concentration of developer in a developing means, and performing control to replenish deficient developer. CONSTITUTION:A developing device 1 is provided with a fixed magnet 2 and a nonmagnetic sleeve 3 installed concentrically and rotatably in its outer periphery. Developer T held on the peripheral face of the sleeve 3 is given to a photosensitive drum 4 with rotation of the sleeve 3, and an electrostatic latent image formed on the peripheral face of the photosensitive drum 4 is changed to a visible image. Concentration of the developer is detected as reflective concentration by a reflective concentration detector 5 provided near the peripheral face of the sleeve 3. Output of the detector 5 is led to a comparison controlling circuit 8 and drives a motor 9 by signals corresponding to the concentration of the developer. A screw conveyor 11 is then rotated through a gear mechanism 10, and toner T1 in the supplying hopper 12 is supplied to the developing section.
JP14965080A 1980-10-24 1980-10-24 Controlling device for developer concentration Pending JPS5773771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14965080A JPS5773771A (en) 1980-10-24 1980-10-24 Controlling device for developer concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14965080A JPS5773771A (en) 1980-10-24 1980-10-24 Controlling device for developer concentration

Publications (1)

Publication Number Publication Date
JPS5773771A true JPS5773771A (en) 1982-05-08

Family

ID=15479852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14965080A Pending JPS5773771A (en) 1980-10-24 1980-10-24 Controlling device for developer concentration

Country Status (1)

Country Link
JP (1) JPS5773771A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60112077A (en) * 1983-11-01 1985-06-18 アグフア・ゲヴエルト・ナームロゼ・ベンノートチヤツプ Toner distribution control
JPS62189484A (en) * 1986-02-17 1987-08-19 Toshiba Corp Image forming device
US5124751A (en) * 1990-05-15 1992-06-23 Minolta Camera Kabushiki Kaisha Image forming apparatus with a toner density control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60112077A (en) * 1983-11-01 1985-06-18 アグフア・ゲヴエルト・ナームロゼ・ベンノートチヤツプ Toner distribution control
JPS62189484A (en) * 1986-02-17 1987-08-19 Toshiba Corp Image forming device
US5124751A (en) * 1990-05-15 1992-06-23 Minolta Camera Kabushiki Kaisha Image forming apparatus with a toner density control device

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