JPS6435580A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS6435580A JPS6435580A JP19161487A JP19161487A JPS6435580A JP S6435580 A JPS6435580 A JP S6435580A JP 19161487 A JP19161487 A JP 19161487A JP 19161487 A JP19161487 A JP 19161487A JP S6435580 A JPS6435580 A JP S6435580A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- replenishing
- concentration
- developer
- image
- 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 always form an image at a fixed density and to prevent deterioration in image forming quality by comparing a developer concentration of a developing means with a reference concentration, judging the replenishing amount of a developer, driving a replenishing means and performing the replenishment of the developer according to the change in the consumption of the developer. CONSTITUTION:A control circuit 120 judges the number of replenishing times and replenishing time according to a voltage value (toner/concentration ratio) from a concentration detecting device 70. Namely, a toner concentration of a developing device 18 is compared with the reference value and the replenishing amount of toner corresponding to the difference is judged. The replenishment of the toner is performed according to the judged replenishing amount and the change in the consumption of the toner by driving the replenishing means. Therefore, when the image whose image density is high or the image whose density is low is copied, the most suitable toner amount can be replenished. Thus, printing can be always performed at the fixed density and the deterioration in the image forming quality is prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19161487A JPS6435580A (en) | 1987-07-31 | 1987-07-31 | Image forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19161487A JPS6435580A (en) | 1987-07-31 | 1987-07-31 | Image forming device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435580A true JPS6435580A (en) | 1989-02-06 |
Family
ID=16277563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19161487A Pending JPS6435580A (en) | 1987-07-31 | 1987-07-31 | Image forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435580A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03114857U (en) * | 1990-03-12 | 1991-11-26 | ||
US5218409A (en) * | 1989-09-19 | 1993-06-08 | Sanyo Electric Co., Ltd. | Image forming apparatus |
EP0782052A2 (en) | 1995-12-28 | 1997-07-02 | Fuji Xerox Co., Ltd. | Image forming apparatus and method enabling toner amount control without actual measurement of toner characteristic |
-
1987
- 1987-07-31 JP JP19161487A patent/JPS6435580A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5218409A (en) * | 1989-09-19 | 1993-06-08 | Sanyo Electric Co., Ltd. | Image forming apparatus |
JPH03114857U (en) * | 1990-03-12 | 1991-11-26 | ||
EP0782052A2 (en) | 1995-12-28 | 1997-07-02 | Fuji Xerox Co., Ltd. | Image forming apparatus and method enabling toner amount control without actual measurement of toner characteristic |
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