JPS575064A - Developing device - Google Patents

Developing device

Info

Publication number
JPS575064A
JPS575064A JP7935680A JP7935680A JPS575064A JP S575064 A JPS575064 A JP S575064A JP 7935680 A JP7935680 A JP 7935680A JP 7935680 A JP7935680 A JP 7935680A JP S575064 A JPS575064 A JP S575064A
Authority
JP
Japan
Prior art keywords
toner
developer
scraper
supply pipe
detecting 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
JP7935680A
Other languages
Japanese (ja)
Inventor
Masayoshi Watanuki
Hidetoshi Yano
Toshio Nakahara
Nobuo Kasahara
Yoshihiro Sakai
Kan Shiga
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 JP7935680A priority Critical patent/JPS575064A/en
Publication of JPS575064A publication Critical patent/JPS575064A/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
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • 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

Landscapes

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

Abstract

PURPOSE:To avoid an evil effect of magnetism caused by a toner supply pipe and a toner concentration detecting device, by providing a magnetic shielding plate among the toner supply pipe, the toner concentration detecting device and a magnetic sleeve respectively. CONSTITUTION:The used developer is scraped off from a sleeve 16 of a magnetic brush developing device by a scraper 29. An opening part 30 is provided to the scraper, and thus a part of the developer drops through this part 30 and led into a toner supply pipe provided under the part 30. Then the developer is mixed with the supplied toner to drop to a toner sink 14. While the developer passed through the part 30 drops to the sink 14 through a toner concentration detecting device 35 and a mixing device 36 provided at an end part of the scraper. The magnetic shielding plates 32 and 33 are provided at the lower part of the scraper. As a result, the lowering of fluidity of the developer in the toner supply pipe and the inaccurateness and unstableness of toner detection can be eliminated.
JP7935680A 1980-06-12 1980-06-12 Developing device Pending JPS575064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7935680A JPS575064A (en) 1980-06-12 1980-06-12 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7935680A JPS575064A (en) 1980-06-12 1980-06-12 Developing device

Publications (1)

Publication Number Publication Date
JPS575064A true JPS575064A (en) 1982-01-11

Family

ID=13687612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7935680A Pending JPS575064A (en) 1980-06-12 1980-06-12 Developing device

Country Status (1)

Country Link
JP (1) JPS575064A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995556A (en) * 1982-11-24 1984-06-01 Ricoh Co Ltd Toner concentration uniformizing device
JPS63309982A (en) * 1987-06-11 1988-12-19 Ricoh Co Ltd Developer supplying and collecting method for developing device
JPH0197359U (en) * 1987-12-18 1989-06-28
EP0491474A2 (en) * 1990-12-19 1992-06-24 Compaq Computer Corporation Closed loop magnetic brush development system
JP2013072881A (en) * 2011-09-26 2013-04-22 Fuji Xerox Co Ltd Development device and image forming device using the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995556A (en) * 1982-11-24 1984-06-01 Ricoh Co Ltd Toner concentration uniformizing device
JPS63309982A (en) * 1987-06-11 1988-12-19 Ricoh Co Ltd Developer supplying and collecting method for developing device
JPH0197359U (en) * 1987-12-18 1989-06-28
EP0491474A2 (en) * 1990-12-19 1992-06-24 Compaq Computer Corporation Closed loop magnetic brush development system
JP2013072881A (en) * 2011-09-26 2013-04-22 Fuji Xerox Co Ltd Development device and image forming device using the same

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