JPS57208577A - Choking preventing device for toner density detector of electronic copying machine - Google Patents

Choking preventing device for toner density detector of electronic copying machine

Info

Publication number
JPS57208577A
JPS57208577A JP9373781A JP9373781A JPS57208577A JP S57208577 A JPS57208577 A JP S57208577A JP 9373781 A JP9373781 A JP 9373781A JP 9373781 A JP9373781 A JP 9373781A JP S57208577 A JPS57208577 A JP S57208577A
Authority
JP
Japan
Prior art keywords
toner density
oscillating
density detector
copying machine
preventing device
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
JP9373781A
Other languages
Japanese (ja)
Inventor
Junichi Osumi
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP9373781A priority Critical patent/JPS57208577A/en
Publication of JPS57208577A publication Critical patent/JPS57208577A/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
    • 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
    • G03G15/0851—Detection or control means for the developer concentration the concentration being measured by electrical means

Landscapes

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

Abstract

PURPOSE:To detect toner density in a stable state invariably, by oscillating the hopper of a toner density detector provided with a piezoelectric oscillating body. CONSTITUTION:To the external surface of the hopper 8 of a toner density detector 7, a piezoelectric oscillating body 12 is fitted by a bonding method, etc. This oscillating body 12 has an electrode 12a for applying a driving voltage, and an amplifying circuit 13 and an oscillating circuit 14 are connected to the electrode 12a to drive the oscillating body 12 at the oscillation frequency of the oscillating circuit 14, thereby oscillating the hopper 8. Further, a scraping plate 15 for scraping a developer after development off from a developing roll 3 is provided.
JP9373781A 1981-06-19 1981-06-19 Choking preventing device for toner density detector of electronic copying machine Pending JPS57208577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9373781A JPS57208577A (en) 1981-06-19 1981-06-19 Choking preventing device for toner density detector of electronic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9373781A JPS57208577A (en) 1981-06-19 1981-06-19 Choking preventing device for toner density detector of electronic copying machine

Publications (1)

Publication Number Publication Date
JPS57208577A true JPS57208577A (en) 1982-12-21

Family

ID=14090716

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9373781A Pending JPS57208577A (en) 1981-06-19 1981-06-19 Choking preventing device for toner density detector of electronic copying machine

Country Status (1)

Country Link
JP (1) JPS57208577A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051564U (en) * 1983-09-16 1985-04-11 日立工機株式会社 Developing device equipped with toner density detection device
JPS638762U (en) * 1986-07-01 1988-01-21
JPH0335268A (en) * 1989-06-30 1991-02-15 Mita Ind Co Ltd Developing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051564U (en) * 1983-09-16 1985-04-11 日立工機株式会社 Developing device equipped with toner density detection device
JPS638762U (en) * 1986-07-01 1988-01-21
JPH0529482Y2 (en) * 1986-07-01 1993-07-28
JPH0335268A (en) * 1989-06-30 1991-02-15 Mita Ind Co Ltd Developing device

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