JPS5742066A - Control device for toner concentration in dry type developing device - Google Patents

Control device for toner concentration in dry type developing device

Info

Publication number
JPS5742066A
JPS5742066A JP11816180A JP11816180A JPS5742066A JP S5742066 A JPS5742066 A JP S5742066A JP 11816180 A JP11816180 A JP 11816180A JP 11816180 A JP11816180 A JP 11816180A JP S5742066 A JPS5742066 A JP S5742066A
Authority
JP
Japan
Prior art keywords
magnet
toner
concn
sleeve
dry type
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
JP11816180A
Other languages
Japanese (ja)
Inventor
Koremasa Inukai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11816180A priority Critical patent/JPS5742066A/en
Publication of JPS5742066A publication Critical patent/JPS5742066A/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

Landscapes

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

Abstract

PURPOSE:To simplify constitution and improve reliability by removing the carrier components on the surface of a moving member with a magnetical means, detecting the amount of the toner remained on the surface of the moving member, and controlling the concn. of the toner with the detected amount as concn. information. CONSTITUTION:In the case of conveying the powdered developer consisting of mixed components of toners and carriers by a magnet roller 31, an optical detector 18 is provided on the side of the roller 31 where there is a magnet 8 is absent, and a plate-like rubber magnet 37 is mounted above this in such a way as to have a gap S from the surface 7 of a rotary sleeve. When the excess developer (a) regulated by a doctor blade 6 falls, part thereof is attracted by the magnet 37, and acts so as to fill the gap S from the sleeve 7, whereby the action of the scraper is effected and the carrier components are removed. The toner a'' remained on the surface of the sleeve 7 is detected with a concn. detector 18.
JP11816180A 1980-08-27 1980-08-27 Control device for toner concentration in dry type developing device Pending JPS5742066A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11816180A JPS5742066A (en) 1980-08-27 1980-08-27 Control device for toner concentration in dry type developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11816180A JPS5742066A (en) 1980-08-27 1980-08-27 Control device for toner concentration in dry type developing device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP29080086A Division JPS62168179A (en) 1986-12-06 1986-12-06 Developing device

Publications (1)

Publication Number Publication Date
JPS5742066A true JPS5742066A (en) 1982-03-09

Family

ID=14729605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11816180A Pending JPS5742066A (en) 1980-08-27 1980-08-27 Control device for toner concentration in dry type developing device

Country Status (1)

Country Link
JP (1) JPS5742066A (en)

Similar Documents

Publication Publication Date Title
JPS5451846A (en) Electrostatic latent image developing device
JPS57165866A (en) Developing device
EP0401020A3 (en) Developing devices for use in electrophotographic apparatus
EP0388233A3 (en) Developing device
JPS5521070A (en) Toner density control device in dry type developing apparatus
JPS5496044A (en) Developing device of electrostatic latent images
JPS5742066A (en) Control device for toner concentration in dry type developing device
GB1438799A (en) Particle dispenser
ATE133274T1 (en) CLOSED CIRCUIT DEVELOPMENT SYSTEM WITH MAGNETIC BRUSH
JPS5742064A (en) Control device for toner density in dry type developing device
JPS57190974A (en) Electrophotographic developing device
JPS55142372A (en) Developer scatter preventive device
JPS5742065A (en) Control device for toner concentration in dry type developing device
JPS5722274A (en) Cleaning device in electrophotographic device
JPS57138672A (en) Dry printer
JPS5533167A (en) Method and apparatus for liquid guide
JPS5614262A (en) Developing device
JPS6460545A (en) Transfer material conveyer
JPS5767973A (en) Cleaning device of electrophotographic copier
JPS5738479A (en) Electrophotographic copying device
JPS5320337A (en) Blade type cleaning device for dry type electrophotographic copier
JPS56151969A (en) Image formation apparatus
JPS54159235A (en) Developing device
JPS56153353A (en) Developing device
JPS5738468A (en) Development device of copier