JPS5657041A - Magnetic toner for electrostatic transfer type copying machine - Google Patents
Magnetic toner for electrostatic transfer type copying machineInfo
- Publication number
- JPS5657041A JPS5657041A JP13291479A JP13291479A JPS5657041A JP S5657041 A JPS5657041 A JP S5657041A JP 13291479 A JP13291479 A JP 13291479A JP 13291479 A JP13291479 A JP 13291479A JP S5657041 A JPS5657041 A JP S5657041A
- Authority
- JP
- Japan
- Prior art keywords
- sheets
- parts
- powder
- toner
- sheet
- 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 make the toner difficult to receive the effects of the kinds of paper and the moisture in the atmosphere and obtain stable copied image quality by using the powder comprising the two parts which are different resin powders of more than the specific value in resistivity containing magnetic materials and are charged to mutually opposite polarities, as the toner.
CONSTITUTION: The material consisting in mixing powder of ferromagnetic powder material in a resin soln. is developed and a solvent is evaporated to make a thin sheetlike material of about 10μ thickness. The material consisting in mixing ferromagnetic material powder in a resin soln. to become other part is developed on this sheet and a solvent is evaporated to form a sheet of about 10μ, whereby the double sheets are obtained. These double sheets are heated to the temperature at which the respective layers soften, and the sheets are cooled while a magnetic field of a perpendicular direction is being applied to the sheet surfaces. Next, the magnetism of the two-layer sheets is erased, after which the sheets are ground and after heat treatment, the ground particles are clasified, whereby the magnetic toner 1 which comprises two parts 2, 3, and in which the parts 2, 3 are oppositively charged so that the magnetic field direct to one direction is obtained. The resins of ≥1017Ω.cm resistivities are used for the resins of the parts 2, 3 respectively.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13291479A JPS5657041A (en) | 1979-10-17 | 1979-10-17 | Magnetic toner for electrostatic transfer type copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13291479A JPS5657041A (en) | 1979-10-17 | 1979-10-17 | Magnetic toner for electrostatic transfer type copying machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5657041A true JPS5657041A (en) | 1981-05-19 |
Family
ID=15092465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13291479A Pending JPS5657041A (en) | 1979-10-17 | 1979-10-17 | Magnetic toner for electrostatic transfer type copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5657041A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57207260A (en) * | 1981-06-16 | 1982-12-18 | Matsushita Electric Ind Co Ltd | Self-chargeable toner |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5298530A (en) * | 1976-02-16 | 1977-08-18 | Hitachi Metals Ltd | Magnetic toner |
JPS534549A (en) * | 1976-07-02 | 1978-01-17 | Konishiroku Photo Ind Co Ltd | Magnetic toner |
JPS539125A (en) * | 1976-07-13 | 1978-01-27 | Ricoh Co Ltd | Dry type devloping powder and its manufacture |
JPS53118054A (en) * | 1977-03-09 | 1978-10-16 | Hitachi Metals Ltd | Magnetic toner |
JPS5647048A (en) * | 1979-09-26 | 1981-04-28 | Toray Ind Inc | Magnetic toner for electrostatic transfer type copying machine |
-
1979
- 1979-10-17 JP JP13291479A patent/JPS5657041A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5298530A (en) * | 1976-02-16 | 1977-08-18 | Hitachi Metals Ltd | Magnetic toner |
JPS534549A (en) * | 1976-07-02 | 1978-01-17 | Konishiroku Photo Ind Co Ltd | Magnetic toner |
JPS539125A (en) * | 1976-07-13 | 1978-01-27 | Ricoh Co Ltd | Dry type devloping powder and its manufacture |
JPS53118054A (en) * | 1977-03-09 | 1978-10-16 | Hitachi Metals Ltd | Magnetic toner |
JPS5647048A (en) * | 1979-09-26 | 1981-04-28 | Toray Ind Inc | Magnetic toner for electrostatic transfer type copying machine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57207260A (en) * | 1981-06-16 | 1982-12-18 | Matsushita Electric Ind Co Ltd | Self-chargeable toner |
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