JPS5587176A - Toner concentration detecting device - Google Patents

Toner concentration detecting device

Info

Publication number
JPS5587176A
JPS5587176A JP15920278A JP15920278A JPS5587176A JP S5587176 A JPS5587176 A JP S5587176A JP 15920278 A JP15920278 A JP 15920278A JP 15920278 A JP15920278 A JP 15920278A JP S5587176 A JPS5587176 A JP S5587176A
Authority
JP
Japan
Prior art keywords
developer
toner
passing
wall
bobbin
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
JP15920278A
Other languages
Japanese (ja)
Other versions
JPS6239432B2 (en
Inventor
Takashige Ito
Kunio Kudo
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 JP15920278A priority Critical patent/JPS5587176A/en
Publication of JPS5587176A publication Critical patent/JPS5587176A/en
Publication of JPS6239432B2 publication Critical patent/JPS6239432B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To detect the toner concentration in a developer always accurately by preventing the developer from depositing electrostatically on the inner wall of passage, by applying antistatic treatment on the inner wall of the passage of developer. CONSTITUTION:In dry type two-component developer, since the carrier and toner are charged in reverse polarity each other, the developer deposits on the inner wall when passing through a bobbin 20 of a toner concentration detecting device 10. At this time, a change occurs in the inductance of a coil 14, so that the mixing ratio of the toner and carrier of the developer in the process of passing can not be detected accurately. To avoid this, an antistatic agent is impregnated or caoted on the developer passing surface of the bobbin, for instance, on the inner wall of the bobbin 20, so that charge may not occur in the developer passing surface. Hence, electrostatic deposition of carrier and toner may be prevented, and the coil 14 can detect the toner mixing ratio in the developer in the process of passing always accurately.
JP15920278A 1978-12-26 1978-12-26 Toner concentration detecting device Granted JPS5587176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15920278A JPS5587176A (en) 1978-12-26 1978-12-26 Toner concentration detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15920278A JPS5587176A (en) 1978-12-26 1978-12-26 Toner concentration detecting device

Publications (2)

Publication Number Publication Date
JPS5587176A true JPS5587176A (en) 1980-07-01
JPS6239432B2 JPS6239432B2 (en) 1987-08-22

Family

ID=15688546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15920278A Granted JPS5587176A (en) 1978-12-26 1978-12-26 Toner concentration detecting device

Country Status (1)

Country Link
JP (1) JPS5587176A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570861A (en) * 1978-11-22 1980-05-28 Ricoh Co Ltd Toner concentration detecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570861A (en) * 1978-11-22 1980-05-28 Ricoh Co Ltd Toner concentration detecting device

Also Published As

Publication number Publication date
JPS6239432B2 (en) 1987-08-22

Similar Documents

Publication Publication Date Title
GB1493280A (en) Method and apparatus for developing electrostatic latent images
GB1481332A (en) Method for the development of electrostatic images
JPS57185052A (en) Developing method
JPS5587176A (en) Toner concentration detecting device
JPS55137551A (en) Electrophotographic dry type developing device
JPS53119049A (en) Detecting and controlling method of toner contents in developer and device for the same
JPS55149962A (en) Magnetic brush type developing device
JPS5691261A (en) Developing device
GB1403258A (en) Magnet roller developing device
JPS53107341A (en) Developing device for one component type developer
JPS5423538A (en) Developer for electrophotography
JPS53129041A (en) Carrier for electrophotographic dry type developing agent
JPS5463830A (en) Development
JPS5511226A (en) Electrostatic latent image developing method
JPS57111564A (en) Developing device
JPS5428631A (en) Carrier material for electrophotographic developer
JPS63187271A (en) Developing device
JPS53107335A (en) Electrostatic latent image developing method
JPS52108139A (en) Magnetic brush device
JPS5218329A (en) The sensitive body cleaning device for the electrophotographic copying machine
JPS6446779A (en) Developing device
JPS5767959A (en) Magnetic brush developing device
JPS57100455A (en) Developing device
JPS5640863A (en) Developing device
JPS52146628A (en) Magnetic brush development for electrophotographic copier