JPS5479634A - Covered carrier - Google Patents
Covered carrierInfo
- Publication number
- JPS5479634A JPS5479634A JP14685977A JP14685977A JPS5479634A JP S5479634 A JPS5479634 A JP S5479634A JP 14685977 A JP14685977 A JP 14685977A JP 14685977 A JP14685977 A JP 14685977A JP S5479634 A JPS5479634 A JP S5479634A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- added
- charging
- covering
- mixture
- 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
- Developing Agents For Electrophotography (AREA)
Abstract
PURPOSE: To enable sufficient charging to be applied to the toner which does not use any charging agent containing Cr and toner cohesion on surface to be reduced by adding Nigrosine base dyes and covering the carrier with an epoxy resin charging strongly to positive.
CONSTITUTION: An epoxy hardener is added at 5 to 50wt% to an epoxy oligomer of 400 to 4000 in molecular weight and Nigrosine base dyes are added 0.5 to 10wt% thereto. The mixture is then dissolved in a suitable solvent. A carrier such as oxide surface treated iron powder or the like is added into this solution, which is then thoroughly stirred. The mixture is dried by a roatry dry method of strring the solution while allowing the solvent to evaporate, by which the carrier having the covering of thicknesses 0,05 to 2μm may be obtained.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14685977A JPS5479634A (en) | 1977-12-07 | 1977-12-07 | Covered carrier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14685977A JPS5479634A (en) | 1977-12-07 | 1977-12-07 | Covered carrier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5479634A true JPS5479634A (en) | 1979-06-25 |
Family
ID=15417166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14685977A Pending JPS5479634A (en) | 1977-12-07 | 1977-12-07 | Covered carrier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5479634A (en) |
-
1977
- 1977-12-07 JP JP14685977A patent/JPS5479634A/en active Pending
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