JPS55110272A - Toner concentration control method of electrophotographic copier - Google Patents
Toner concentration control method of electrophotographic copierInfo
- Publication number
- JPS55110272A JPS55110272A JP1875179A JP1875179A JPS55110272A JP S55110272 A JPS55110272 A JP S55110272A JP 1875179 A JP1875179 A JP 1875179A JP 1875179 A JP1875179 A JP 1875179A JP S55110272 A JPS55110272 A JP S55110272A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- recovery
- roller
- sleeve
- replenishing
- 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 obtain the toner concentration control method by which the flying of toner is prevented and good images may be obtained by recovering the toner through the use of two rollers according to image densities, and replenishing the toner through controlling depending upon the condition of the images thereby taking the balance of the replenishment and recovery. CONSTITUTION:A developing sleeve 22 and an automatic toner replenishing device 30 are built in a developing device 20. A toner recovery roller 32 is so mounted in proximity to the sleeve 22 as to be able to be rotated counterclockwise to the side part of a toner tank 31. To this is applied bias voltage from a power source 36 so as to provide a potential difference from the sleeve 22, whereby the toner is recovered. A replenishing roller 33 is provided to the lower part of the tank 31 and the number of revolutions of the roller 33 is changed by a drive control unit 16 according to the signal of an image density detecting part 13, whereby the required amount is replenished. By automatically balancing the replenishment and recovery in this way, the toner concentration may be controlled in a narrow fluctuation width and the good images obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1875179A JPS55110272A (en) | 1979-02-19 | 1979-02-19 | Toner concentration control method of electrophotographic copier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1875179A JPS55110272A (en) | 1979-02-19 | 1979-02-19 | Toner concentration control method of electrophotographic copier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55110272A true JPS55110272A (en) | 1980-08-25 |
Family
ID=11980343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1875179A Pending JPS55110272A (en) | 1979-02-19 | 1979-02-19 | Toner concentration control method of electrophotographic copier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55110272A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104677A (en) * | 1982-12-07 | 1984-06-16 | Fujitsu Ltd | Dry type electronic printer |
| JPS60177373A (en) * | 1984-02-24 | 1985-09-11 | Mita Ind Co Ltd | Toner consumption detector |
| JPS60178474A (en) * | 1984-02-24 | 1985-09-12 | Mita Ind Co Ltd | Display device for residual amount of toner |
| JPS60178475A (en) * | 1984-02-24 | 1985-09-12 | Mita Ind Co Ltd | Toner controller |
| JPH02203367A (en) * | 1989-02-01 | 1990-08-13 | Minolta Camera Co Ltd | Developing device |
-
1979
- 1979-02-19 JP JP1875179A patent/JPS55110272A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104677A (en) * | 1982-12-07 | 1984-06-16 | Fujitsu Ltd | Dry type electronic printer |
| JPS60177373A (en) * | 1984-02-24 | 1985-09-11 | Mita Ind Co Ltd | Toner consumption detector |
| JPS60178474A (en) * | 1984-02-24 | 1985-09-12 | Mita Ind Co Ltd | Display device for residual amount of toner |
| JPS60178475A (en) * | 1984-02-24 | 1985-09-12 | Mita Ind Co Ltd | Toner controller |
| JPH02203367A (en) * | 1989-02-01 | 1990-08-13 | Minolta Camera Co Ltd | Developing device |
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