JPS5543563A - Developing apparatus - Google Patents
Developing apparatusInfo
- Publication number
- JPS5543563A JPS5543563A JP11692078A JP11692078A JPS5543563A JP S5543563 A JPS5543563 A JP S5543563A JP 11692078 A JP11692078 A JP 11692078A JP 11692078 A JP11692078 A JP 11692078A JP S5543563 A JPS5543563 A JP S5543563A
- Authority
- JP
- Japan
- Prior art keywords
- potential
- toner particles
- blade
- charge
- developer
- 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 obtain picture image free from concentration changes, by controlling the charge injection amount depending on the potential of the developer and keeping constant the potential of toner particles, in a developing apparatus designed to charge the one-pack developer by charge injection. CONSTITUTION:Magnetic toner particles 3 of a one-pack developer on a developing sleeve 1 supplied from a toner supply device 2 are defined to a specified height by means of a conductive blade 5, and are dielectrically charged by the charge injected from the blade 5, and an electrostatic latent image is formed by contacting with a photosensitive drum 6. The potential of the toner particles on the sleeve 1 is detected by a detector P which comprises a capacitive probe, and is amplified by an amplifier A1, then compared with a reference voltage VREF by a comparator comprising an amplifier A2. This output signal is applied to said blade 5 through a circuit consisting of resistors R3, R4, diode D1, and capacitor C1. Therefore, the charge injection amount is controlled according to the potential of the toner particles is maintained at a constant level, so that concentration changes of the developed image may be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11692078A JPS5543563A (en) | 1978-09-22 | 1978-09-22 | Developing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11692078A JPS5543563A (en) | 1978-09-22 | 1978-09-22 | Developing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5543563A true JPS5543563A (en) | 1980-03-27 |
Family
ID=14698930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11692078A Pending JPS5543563A (en) | 1978-09-22 | 1978-09-22 | Developing apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5543563A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20180059878A (en) | 2016-02-19 | 2018-06-05 | 얀마 가부시키가이샤 | Engine device |
-
1978
- 1978-09-22 JP JP11692078A patent/JPS5543563A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20180059878A (en) | 2016-02-19 | 2018-06-05 | 얀마 가부시키가이샤 | Engine device |
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