JPS60467A - Developing device - Google Patents

Developing device

Info

Publication number
JPS60467A
JPS60467A JP10905783A JP10905783A JPS60467A JP S60467 A JPS60467 A JP S60467A JP 10905783 A JP10905783 A JP 10905783A JP 10905783 A JP10905783 A JP 10905783A JP S60467 A JPS60467 A JP S60467A
Authority
JP
Japan
Prior art keywords
developer
toner
sleeve
developing gap
vicinity
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
JP10905783A
Other languages
Japanese (ja)
Inventor
Takaharu Goto
Keitaro Yamashita
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.)
Hitachi Metals Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP10905783A priority Critical patent/JPS60467A/en
Publication of JPS60467A publication Critical patent/JPS60467A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849Detection or control means for the developer concentration
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849Detection or control means for the developer concentration
    • G03G15/0853Detection or control means for the developer concentration the concentration being measured by magnetic means

Abstract

PURPOSE:To detect exactly a toner density by providing an auxiliary magnetic pole of the opposite polarity between the same pole opposed parts, respectively, and placing a toner density detecting member in the vicinity of this auxiliary magnetic pole. CONSTITUTION:When a nonmagnetic sleeve 4 is rotated in the direction as indicated with an arrow X, a developer 2 adsorbed onto the sleeve is carried toward a developing gap D from a doctor gap (d). In the vicinity of the developing gap D, the surface of a photosensitive drum 1 is slid and rubbed by a magnetic brush formed by the developer 2, and an electrostatic latent image formed on the drum 1 is developed. When the developer 2 which has passed through the developing gap D reaches the same pole opposed part, it is scraped down from the nonmagnetic sleeve 4 and collected into a developer tank 3. The collected developer 3 is stirred and mixed by an impeller 9 together with a toner 2a discharged from a toner tank 10 by a rotation of a toner feed roll 13, and thereafter, attracted onto the nonmagnetic sleeve 4 again and used for a development.
JP10905783A 1983-06-17 1983-06-17 Developing device Pending JPS60467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10905783A JPS60467A (en) 1983-06-17 1983-06-17 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10905783A JPS60467A (en) 1983-06-17 1983-06-17 Developing device

Publications (1)

Publication Number Publication Date
JPS60467A true JPS60467A (en) 1985-01-05

Family

ID=14500503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10905783A Pending JPS60467A (en) 1983-06-17 1983-06-17 Developing device

Country Status (1)

Country Link
JP (1) JPS60467A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6283778A (en) * 1985-10-07 1987-04-17 Minolta Camera Co Ltd Developing device
US4891675A (en) * 1985-02-04 1990-01-02 Sharp Kabushiki Kaisha Developer density detection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891675A (en) * 1985-02-04 1990-01-02 Sharp Kabushiki Kaisha Developer density detection device
JPS6283778A (en) * 1985-10-07 1987-04-17 Minolta Camera Co Ltd Developing device

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