JPS6440965A - Toner concentration controller - Google Patents
Toner concentration controllerInfo
- Publication number
- JPS6440965A JPS6440965A JP19744887A JP19744887A JPS6440965A JP S6440965 A JPS6440965 A JP S6440965A JP 19744887 A JP19744887 A JP 19744887A JP 19744887 A JP19744887 A JP 19744887A JP S6440965 A JPS6440965 A JP S6440965A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- toner
- end part
- surface part
- toner concentration
- 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
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To improve the reliability of the titled toner concentration controller and to make its constitution compact by providing the function of a toner concentration detection probe to the outer peripherals surface part of an end part of a developer support body which conveys a developer, and performing optical detection. CONSTITUTION:A developing roller 31 which conveys the developer is so constituted not to convey the developer at the outer peripheral surface part of its end part 31a, but to stick and convey only toner in the developer. Namely, magnetic pole parts 42-44 for developer conveyance in the outer peripheral surface part of the end part 31a of the developing roller 31 are removed and one magnetic pole part is arranged as a developer holding pole 51 opposite a doctor blade 34 to stick only the toner on the outer peripheral surface part of the end part 31a of the developing roller 31 by trioelectrification or mechanically, thereby conveying the toner. Then a reflection type optical sensor 54 detects variation in the quantity of the stuck toner optical to measure the toner concentration in the developer and the toner is supplied to a developing device 5 according to the measurement result. Consequently, the reliability is improved and the constitution is made compact.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19744887A JPS6440965A (en) | 1987-08-07 | 1987-08-07 | Toner concentration controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19744887A JPS6440965A (en) | 1987-08-07 | 1987-08-07 | Toner concentration controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6440965A true JPS6440965A (en) | 1989-02-13 |
Family
ID=16374675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19744887A Pending JPS6440965A (en) | 1987-08-07 | 1987-08-07 | Toner concentration controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6440965A (en) |
-
1987
- 1987-08-07 JP JP19744887A patent/JPS6440965A/en active Pending
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