JPS5742064A - Control device for toner density in dry type developing device - Google Patents

Control device for toner density in dry type developing device

Info

Publication number
JPS5742064A
JPS5742064A JP11815980A JP11815980A JPS5742064A JP S5742064 A JPS5742064 A JP S5742064A JP 11815980 A JP11815980 A JP 11815980A JP 11815980 A JP11815980 A JP 11815980A JP S5742064 A JPS5742064 A JP S5742064A
Authority
JP
Japan
Prior art keywords
density
toner
scraper
rotary sleeve
toner density
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
JP11815980A
Other languages
Japanese (ja)
Other versions
JPS6333705B2 (en
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 JP11815980A priority Critical patent/JPS5742064A/en
Publication of JPS5742064A publication Critical patent/JPS5742064A/en
Publication of JPS6333705B2 publication Critical patent/JPS6333705B2/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
    • 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 improve reliability and reduce costs by the simple constitution consisting of removing the carrier components on the surface of a rotary sleeve with a scraper, detecting the amount of the toner remained on the surface of the rotary sleeve and controlling the toner density of the developer with said detected amount as density information. CONSTITUTION:A scraper 13 which peels the developer (a) receiving no more influence of a magnet 8 located in the upper part by having passed through a development area 12 and guides the same onto an impeller 11 is provided in the upper rear side of a magnet roller 5, and further, an optical density detector 18 is provided below the scraper 13, by which the density of a residual toner sticking area 19 where only the residual toner a'' separated from the carriers on the surface of a rotary sleeve 7 sticks is detected and is fed as density information to a density control circuit 25 which produces a replenishing signal 26 when the density is low, whereby replenishing of the toner a' is accomplished.
JP11815980A 1980-08-27 1980-08-27 Control device for toner density in dry type developing device Granted JPS5742064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11815980A JPS5742064A (en) 1980-08-27 1980-08-27 Control device for toner density in dry type developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11815980A JPS5742064A (en) 1980-08-27 1980-08-27 Control device for toner density in dry type developing device

Publications (2)

Publication Number Publication Date
JPS5742064A true JPS5742064A (en) 1982-03-09
JPS6333705B2 JPS6333705B2 (en) 1988-07-06

Family

ID=14729555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11815980A Granted JPS5742064A (en) 1980-08-27 1980-08-27 Control device for toner density in dry type developing device

Country Status (1)

Country Link
JP (1) JPS5742064A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080880A (en) * 1983-10-08 1985-05-08 Olympus Optical Co Ltd Automatic density regulator
JP2007003713A (en) * 2005-06-22 2007-01-11 Ricoh Co Ltd Image forming device and image forming method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080880A (en) * 1983-10-08 1985-05-08 Olympus Optical Co Ltd Automatic density regulator
JP2007003713A (en) * 2005-06-22 2007-01-11 Ricoh Co Ltd Image forming device and image forming method

Also Published As

Publication number Publication date
JPS6333705B2 (en) 1988-07-06

Similar Documents

Publication Publication Date Title
JPS5742064A (en) Control device for toner density in dry type developing device
JPS5521070A (en) Toner density control device in dry type developing apparatus
JPS5745573A (en) Development device for magnetic toner
JPS5266420A (en) Projecting optical device
JPS56121068A (en) Developing device of electrostatic copying machine
JPS54126552A (en) Toner replenishing device for developing of copying machines and others
JPS52130335A (en) Developing unit for dry type electronic copying device
JPS5316633A (en) Electrophotographic developing agent
JPS5742066A (en) Control device for toner concentration in dry type developing device
JPS5778564A (en) Copying machine with automatic original feeder
JPS5729061A (en) Detector for remaining amount of toner of electrophotographic copier
JPS5339137A (en) Electronic photograph fixing apparatus
JPS5742065A (en) Control device for toner concentration in dry type developing device
JPS5368241A (en) Electrophotographic dry developing device
JPS57169765A (en) Original carrying device
JPS5511253A (en) Clogging preventing device of toner concentration detector
JPS52136637A (en) Separation mechanism
JPS53102756A (en) Dry developing device
JPS52150640A (en) Copier
JPS5650359A (en) Transfer paper separating device in transfer type copying machine
JPS5528082A (en) Developing device
JPS56151969A (en) Image formation apparatus
JPS53120526A (en) Thermal developing device
JPS54131944A (en) Toner concentration detector
JPS56114974A (en) Controller of copying machine