JPS6410282A - Copying machine - Google Patents
Copying machineInfo
- Publication number
- JPS6410282A JPS6410282A JP62167581A JP16758187A JPS6410282A JP S6410282 A JPS6410282 A JP S6410282A JP 62167581 A JP62167581 A JP 62167581A JP 16758187 A JP16758187 A JP 16758187A JP S6410282 A JPS6410282 A JP S6410282A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- developing sleeve
- bias voltage
- developing
- recovering
- 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)
- Developing For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To obtain copied reproduced images according to desirable selected density by providing a control means for keeping potential difference between a developing sleeve and a toner recovering roll at a constant value by altering a recovering bias voltage. CONSTITUTION:The control means for keeping the potential difference DELTAV between the developing sleeve 4 and the toner recovering roll 9 at a constant value by altering the recovering bias voltage Vss as soon as the copied image density is adjusted by altering a developing bias voltage Vb is provided on the titled machine. Then, the potential difference DELTAV is kept constant and the quantity of supplying toner from the toner supply roll 9 to the developing sleeve 4 and the quantity of recovering toner from the developing sleeve 4 to the toner supply roller 9 are balanced and the toner concentration on the developing sleeve is kept constant. Then, in a state where the toner concentration is constant, developing is executed based on the potential difference between the developing sleeve on which altered developing bias voltage is impressed and an electrostatic latent image carrier whose electrified potential is constant. Thus, the reproduced image according to the desirable selected image density can be obtained even if the developing bias voltage is altered.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167581A JPS6410282A (en) | 1987-07-02 | 1987-07-02 | Copying machine |
| US07/214,644 US4912513A (en) | 1987-07-02 | 1988-07-01 | Developing apparatus with variable developing bias voltage |
| DE3822591A DE3822591A1 (en) | 1987-07-02 | 1988-07-04 | COPIER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167581A JPS6410282A (en) | 1987-07-02 | 1987-07-02 | Copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6410282A true JPS6410282A (en) | 1989-01-13 |
Family
ID=15852404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62167581A Pending JPS6410282A (en) | 1987-07-02 | 1987-07-02 | Copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6410282A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08271645A (en) * | 1995-03-31 | 1996-10-18 | Mitsubishi Electric Corp | Human-body detection apparatus |
| JP2005189767A (en) * | 2003-12-26 | 2005-07-14 | Canon Inc | Developing apparatus and image forming apparatus |
| JP2006084598A (en) * | 2004-09-14 | 2006-03-30 | Katsuragawa Electric Co Ltd | Developing device |
-
1987
- 1987-07-02 JP JP62167581A patent/JPS6410282A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08271645A (en) * | 1995-03-31 | 1996-10-18 | Mitsubishi Electric Corp | Human-body detection apparatus |
| JP2005189767A (en) * | 2003-12-26 | 2005-07-14 | Canon Inc | Developing apparatus and image forming apparatus |
| JP2006084598A (en) * | 2004-09-14 | 2006-03-30 | Katsuragawa Electric Co Ltd | Developing device |
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