JPS5619070A - Developer concentration detector - Google Patents
Developer concentration detectorInfo
- 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
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.
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)
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 |
-
1979
- 1979-07-25 JP JP9470479A patent/JPS5619070A/en active Pending
Cited By (4)
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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