JPS56107273A - Detector for residual amount of toner of electrophotographic dry type developing device - Google Patents
Detector for residual amount of toner of electrophotographic dry type developing deviceInfo
- Publication number
- JPS56107273A JPS56107273A JP18843280A JP18843280A JPS56107273A JP S56107273 A JPS56107273 A JP S56107273A JP 18843280 A JP18843280 A JP 18843280A JP 18843280 A JP18843280 A JP 18843280A JP S56107273 A JPS56107273 A JP S56107273A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- residual amount
- detector
- developing device
- dry type
- 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
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To automatically detect the residual amount of a toner by providing an optical detecting means consisting of a light emitting element and a photodetector, and capturing the light falling to a developing roller and reflected therefrom. CONSTITUTION:A detecting part 9 provided with a light source 11 and a photosemiconductor element 12 is disposed in proximity to a developing roller 4, and is mounted to a stationary bracket 10. The element 12 constitutes one side of a bridge circuit, and with a change in the resistance value of this element 12, a potential difference is generated in the bridge, by which a detecting lamp 15 is lighted or other alarm device is operated. In this way, the residual amount of the toner is detected automatically with a slight expense; nevertheless, the device for this purpose is mounted to the machine frame irrespective of the mounting and dismounting of a toner receiving hopper and separately from the developing part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18843280A JPS56107273A (en) | 1980-12-27 | 1980-12-27 | Detector for residual amount of toner of electrophotographic dry type developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18843280A JPS56107273A (en) | 1980-12-27 | 1980-12-27 | Detector for residual amount of toner of electrophotographic dry type developing device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP48083612A Division JPS5925220B2 (en) | 1973-07-26 | 1973-07-26 | Toner remaining amount detection device for electrophotographic dry developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56107273A true JPS56107273A (en) | 1981-08-26 |
Family
ID=16223563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18843280A Pending JPS56107273A (en) | 1980-12-27 | 1980-12-27 | Detector for residual amount of toner of electrophotographic dry type developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56107273A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5034243A (en) * | 1973-07-26 | 1975-04-02 |
-
1980
- 1980-12-27 JP JP18843280A patent/JPS56107273A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5034243A (en) * | 1973-07-26 | 1975-04-02 |
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