JPS5687069A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS5687069A JPS5687069A JP16434679A JP16434679A JPS5687069A JP S5687069 A JPS5687069 A JP S5687069A JP 16434679 A JP16434679 A JP 16434679A JP 16434679 A JP16434679 A JP 16434679A JP S5687069 A JPS5687069 A JP S5687069A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- sleeve
- blade
- thickness
- rubbed
- 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.)
- Granted
Links
Landscapes
- Developing For Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
PURPOSE: To perform developing of high densities with less ground photographic fog by applying high-frequency alternating voltage between a toner carrying body and a thickness control member for the toner thereby vibrating the toner.
CONSTITUTION: A rotatable sleeve 2 of a nonmagnetic material in proximity to a photosensitive drum 1 and a magnet roller 3 secured to the inside thereof are provided. A blade 5 for controlling the thickness of the magnetic toner 4 is provided in proximity to the sleeve surface, and AC bias voltage is applied to this by a power source device 6. At this time, the sleeve 2 is held grounded. The magnetic toner 4 is rubbed by the rotation of the sleeve 2 and has charge of a certain extent. However, further the toner 4 arriving near the blade 5 is limited of its thickness by the blade 5; at the same time, the alternating voltage applied between the sleeve 2 and the blade 5 causes the toner to go between both, thus the toner is rubbed and is thoroughly charged. Hence, with such constitution, the developing of high densities with less ground photographic fog is accomplished.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16434679A JPS5687069A (en) | 1979-12-18 | 1979-12-18 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16434679A JPS5687069A (en) | 1979-12-18 | 1979-12-18 | Developing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5687069A true JPS5687069A (en) | 1981-07-15 |
JPH0121508B2 JPH0121508B2 (en) | 1989-04-21 |
Family
ID=15791414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16434679A Granted JPS5687069A (en) | 1979-12-18 | 1979-12-18 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5687069A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009069329A (en) * | 2007-09-12 | 2009-04-02 | Ricoh Co Ltd | Developing device, process cartridge, and image forming apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54155043A (en) * | 1978-05-26 | 1979-12-06 | Ricoh Co Ltd | Method of developing electrostatic latent image |
-
1979
- 1979-12-18 JP JP16434679A patent/JPS5687069A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54155043A (en) * | 1978-05-26 | 1979-12-06 | Ricoh Co Ltd | Method of developing electrostatic latent image |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009069329A (en) * | 2007-09-12 | 2009-04-02 | Ricoh Co Ltd | Developing device, process cartridge, and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0121508B2 (en) | 1989-04-21 |
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