JPS5478136A - Carrier material for electrostatic photographic developer - Google Patents
Carrier material for electrostatic photographic developerInfo
- Publication number
- JPS5478136A JPS5478136A JP14510977A JP14510977A JPS5478136A JP S5478136 A JPS5478136 A JP S5478136A JP 14510977 A JP14510977 A JP 14510977A JP 14510977 A JP14510977 A JP 14510977A JP S5478136 A JPS5478136 A JP S5478136A
- Authority
- JP
- Japan
- Prior art keywords
- materials
- glass layer
- suspension
- inorganic glass
- covering
- 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 reduce the accumulation of toner films on carrier particle surfaces and enhance durability by covering the core material surfaces with an inorganic glass layer.
CONSTITUTION: After glass raw materials having been blended to a desired composition are melted, the melt is quenched and is ground to about 200 mesh by a ball mill. This is then made to a suspension together with additives. This suspension is sprayed over a circulating fluidized bed by a spray gun or the like and is thereby sprayed onto the surfaces of the core materials of preferably 100 to 500μ in mean particle size whose surfaces have beforehand been degreased with a halogenated hycrocarbon base solvent. After it has been dried, it is baked in a high temperature furnace. Thereby, stable and desired triboelectrification characteristics are imparted and either positive or negative charging characteristics may be selected as desired by selecting the materials of the covering material. Suitable coverage of the inorganic glass layer is 0.1 to 1.5 wt.%.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14510977A JPS5478136A (en) | 1977-12-05 | 1977-12-05 | Carrier material for electrostatic photographic developer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14510977A JPS5478136A (en) | 1977-12-05 | 1977-12-05 | Carrier material for electrostatic photographic developer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5478136A true JPS5478136A (en) | 1979-06-22 |
Family
ID=15377579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14510977A Pending JPS5478136A (en) | 1977-12-05 | 1977-12-05 | Carrier material for electrostatic photographic developer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5478136A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02131250A (en) * | 1988-11-11 | 1990-05-21 | Minolta Camera Co Ltd | Developing agent |
-
1977
- 1977-12-05 JP JP14510977A patent/JPS5478136A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02131250A (en) * | 1988-11-11 | 1990-05-21 | Minolta Camera Co Ltd | Developing agent |
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