JPS568154A - Electrophotographic developing method - Google Patents
Electrophotographic developing methodInfo
- Publication number
- JPS568154A JPS568154A JP6283380A JP6283380A JPS568154A JP S568154 A JPS568154 A JP S568154A JP 6283380 A JP6283380 A JP 6283380A JP 6283380 A JP6283380 A JP 6283380A JP S568154 A JPS568154 A JP S568154A
- Authority
- JP
- Japan
- Prior art keywords
- bias voltage
- magnetic brush
- magnetic
- developer
- roller
- 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
Abstract
PURPOSE: To enhance development reliability and high speed recording performance in magnetic brush type electrophotographic reversal development, by developing an electrostatic image between a recording member and a magnet roller under the conditions where self-bias voltage occurs in the region free from the charge of the electrostatic image.
CONSTITUTION: In order to effect reversal development without applying bias voltage between electrostatic recording member 1 and magnet roller 5, a 5mm long magnetic brush of a mixture of magnetic carrier and toner particles in 100:5 weight ratio is formed on roller 5 rotating at 50cm/sec peripheral speed and having 800 gauss magnetic intensity. At that time, a developer used allows the magnetic brush to rise in volume resistivity to 3.5×109ohm.cm or more when 100V DC is applied. This developer is obtained by adjusting an amount of insulating material for coating the magnetic carrier particles and mixing of a powder of Ni or the like, thus permitting the magnetic brush formed by use of this developer to produce self bias voltage, and therefore, reversal development to be made without applying bias voltage between member 1 and roller 5.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6283380A JPS568154A (en) | 1980-05-14 | 1980-05-14 | Electrophotographic developing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6283380A JPS568154A (en) | 1980-05-14 | 1980-05-14 | Electrophotographic developing method |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14774876A Division JPS5372627A (en) | 1976-12-10 | 1976-12-10 | Developing agent and reversal development |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS568154A true JPS568154A (en) | 1981-01-27 |
Family
ID=13211706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6283380A Pending JPS568154A (en) | 1980-05-14 | 1980-05-14 | Electrophotographic developing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS568154A (en) |
-
1980
- 1980-05-14 JP JP6283380A patent/JPS568154A/en active Pending
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