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JPS57148775A - Developing device - Google Patents

Developing device

Info

Publication number
JPS57148775A
JPS57148775A JP3581381A JP3581381A JPS57148775A JP S57148775 A JPS57148775 A JP S57148775A JP 3581381 A JP3581381 A JP 3581381A JP 3581381 A JP3581381 A JP 3581381A JP S57148775 A JPS57148775 A JP S57148775A
Authority
JP
Japan
Prior art keywords
magnetic
toner
sleeve
detector
amount
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.)
Granted
Application number
JP3581381A
Other languages
Japanese (ja)
Other versions
JPH0253794B2 (en
Inventor
Takeshi Saito
Hidenori Kawabuchi
Masateru Mutsuhira
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 JP3581381A priority Critical patent/JPS57148775A/en
Publication of JPS57148775A publication Critical patent/JPS57148775A/en
Publication of JPH0253794B2 publication Critical patent/JPH0253794B2/ja
Granted 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
    • G03G15/0856—Detection or control means for the developer level

Landscapes

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

Abstract

PURPOSE:To detect the amount of the residual developer in an assured and stable way, by setting a scraper between a control member of the developer and an oscillation type residual developer detector. CONSTITUTION:A sleeve 5 of a development roller 3 is rotated to draw the magnetic toner into a developing device 2. Then a magnetic brush is formed on the sleeve 5 through a control member 11 with a certain height of the brush spikes. An electrostatic latent image is formed on a photoreceptor drum 1 by the magnetic brush. The magnetic toner used for the development is sent back to a toner sink in the device 2. In this case, the member 11 is formed on an upper plate 10 of the device 2 to control the amount of the toner which is drawn by the sleeve 5. A magnetic 6-3 is set opposite to the area between a residual developer amount detector 8 and a projected part 12a of a scraper 12 provided in front of the member 11. Then the toner on an oscillation member 9 of the detector 8 is also drawn by the magnetic links.
JP3581381A 1981-03-12 1981-03-12 Developing device Granted JPS57148775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3581381A JPS57148775A (en) 1981-03-12 1981-03-12 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3581381A JPS57148775A (en) 1981-03-12 1981-03-12 Developing device

Publications (2)

Publication Number Publication Date
JPS57148775A true JPS57148775A (en) 1982-09-14
JPH0253794B2 JPH0253794B2 (en) 1990-11-19

Family

ID=12452361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3581381A Granted JPS57148775A (en) 1981-03-12 1981-03-12 Developing device

Country Status (1)

Country Link
JP (1) JPS57148775A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63103281A (en) * 1986-10-20 1988-05-07 Ricoh Co Ltd Electrostatic latent image developing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63103281A (en) * 1986-10-20 1988-05-07 Ricoh Co Ltd Electrostatic latent image developing device

Also Published As

Publication number Publication date
JPH0253794B2 (en) 1990-11-19

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