JPS54103359A - Toner density controller - Google Patents
Toner density controllerInfo
- Publication number
- JPS54103359A JPS54103359A JP1081478A JP1081478A JPS54103359A JP S54103359 A JPS54103359 A JP S54103359A JP 1081478 A JP1081478 A JP 1081478A JP 1081478 A JP1081478 A JP 1081478A JP S54103359 A JPS54103359 A JP S54103359A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- forming region
- toner density
- photodetector
- lamp
- 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)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To automatically control so as to stabilize toner density in a fixed range, by optically detecting the toner image forming region and the not forming region of the ineffective image area of an photoreceptor and by controlling toner feed. CONSTITUTION:Toner image forming region 16 due to whole exposure and not forming region 19 are formed on ineffective image area 15a of photosensitive drum 4. Toner density if automatically controlled to be stable in a constant range by detecting regions 16 and 19 with lamp 17 and photodetector 18, and lamp 20 and photodetector 21, and by feeding toner from a toner feeder to a developing device when the toner density drops and the difference between the detected signal values of photodetectors 18 and 21 becomes lower than a predetermined value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1081478A JPS54103359A (en) | 1978-01-31 | 1978-01-31 | Toner density controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1081478A JPS54103359A (en) | 1978-01-31 | 1978-01-31 | Toner density controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54103359A true JPS54103359A (en) | 1979-08-14 |
Family
ID=11760807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1081478A Pending JPS54103359A (en) | 1978-01-31 | 1978-01-31 | Toner density controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54103359A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57173865A (en) * | 1981-04-21 | 1982-10-26 | Fuji Xerox Co Ltd | Picture density controller of electronic copier |
JPS59128657U (en) * | 1983-02-03 | 1984-08-29 | 株式会社東芝 | developing device |
US4866481A (en) * | 1986-08-26 | 1989-09-12 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having a plurality of developers and a detection and control arrangement for detecting the density of a formed image and a controller for controlling the density of the image |
-
1978
- 1978-01-31 JP JP1081478A patent/JPS54103359A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57173865A (en) * | 1981-04-21 | 1982-10-26 | Fuji Xerox Co Ltd | Picture density controller of electronic copier |
JPH0241752B2 (en) * | 1981-04-21 | 1990-09-19 | ||
JPS59128657U (en) * | 1983-02-03 | 1984-08-29 | 株式会社東芝 | developing device |
US4866481A (en) * | 1986-08-26 | 1989-09-12 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having a plurality of developers and a detection and control arrangement for detecting the density of a formed image and a controller for controlling the density of the image |
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