JPS5619070A - Developer concentration detector - Google Patents

Developer concentration detector

Info

Publication number
JPS5619070A
JPS5619070A JP9470479A JP9470479A JPS5619070A JP S5619070 A JPS5619070 A JP S5619070A JP 9470479 A JP9470479 A JP 9470479A JP 9470479 A JP9470479 A JP 9470479A JP S5619070 A JPS5619070 A JP S5619070A
Authority
JP
Japan
Prior art keywords
bias voltage
roller
disk
toner
developer
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
JP9470479A
Other languages
Japanese (ja)
Inventor
Takashi Hamada
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 JP9470479A priority Critical patent/JPS5619070A/en
Publication of JPS5619070A publication Critical patent/JPS5619070A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable exact detection of a toner with high precision, by optically detecting concentration of the toner attached to a conductive rotary body same in voltage as development bias voltage applied to a magnet roller forming a magnetic brush. CONSTITUTION:Bias voltage is applied to rotary conductive disk 22, rotating adjacently to magnet roller 14 forming magnetic bursh 15, from bias voltage source 16 also applying the same bias voltage to roller 14 in order to keep disk 22 and roller 14 in the same potential. This structure permits always stable toner attachment characteristics to be ensured by disk 22 without enlarging the capacity of source 16 and independent of resistance of a developer, and high precision exact detection of developer concentration to be carried out with optical detector 26.
JP9470479A 1979-07-25 1979-07-25 Developer concentration detector Pending JPS5619070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9470479A JPS5619070A (en) 1979-07-25 1979-07-25 Developer concentration detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9470479A JPS5619070A (en) 1979-07-25 1979-07-25 Developer concentration detector

Publications (1)

Publication Number Publication Date
JPS5619070A true JPS5619070A (en) 1981-02-23

Family

ID=14117545

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9470479A Pending JPS5619070A (en) 1979-07-25 1979-07-25 Developer concentration detector

Country Status (1)

Country Link
JP (1) JPS5619070A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58184977U (en) * 1982-06-02 1983-12-08 キヤノン株式会社 tv jiyoung camera
EP0036818B1 (en) * 1980-03-20 1984-07-25 Jean-Claude Coquin Accessory mount for a camera lens and lens shade usable with it
JPS59128657U (en) * 1983-02-03 1984-08-29 株式会社東芝 developing device
JPS63191784U (en) * 1988-05-24 1988-12-09

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036818B1 (en) * 1980-03-20 1984-07-25 Jean-Claude Coquin Accessory mount for a camera lens and lens shade usable with it
JPS58184977U (en) * 1982-06-02 1983-12-08 キヤノン株式会社 tv jiyoung camera
JPS59128657U (en) * 1983-02-03 1984-08-29 株式会社東芝 developing device
JPS63191784U (en) * 1988-05-24 1988-12-09

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