JPS55113056A - Magnetic toner for developing electrostatic image - Google Patents
Magnetic toner for developing electrostatic imageInfo
- Publication number
- JPS55113056A JPS55113056A JP2032179A JP2032179A JPS55113056A JP S55113056 A JPS55113056 A JP S55113056A JP 2032179 A JP2032179 A JP 2032179A JP 2032179 A JP2032179 A JP 2032179A JP S55113056 A JPS55113056 A JP S55113056A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- magnetic material
- electrostatic image
- magnetic toner
- resin
- 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 Agents For Electrophotography (AREA)
Abstract
PURPOSE: To obtain a toner for developing an electrostatic image superior in charge retentivity characteristics even under a high humidity atmosphere, by incorporating a specified magnetic material with a resin.
CONSTITUTION: A magnetic material, such as ferrite or magnetite having a moisture content of 0.15wt% at a temperature of 20°C and a relative humidity of 60% and a mean particle diamether of 0.1W1.5μ is incorporated with a thermoplastic resin (preferably a vinyl type resin having a weight average molecular weight of about 1000W500 thousand and a glass transition temperature of about 20°C or higher) to form a toner. It is desirable that the content of magnetic material in the above toner is 20W70wt% and the particle diameter of the toner is 1W50μ.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2032179A JPS55113056A (en) | 1979-02-23 | 1979-02-23 | Magnetic toner for developing electrostatic image |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2032179A JPS55113056A (en) | 1979-02-23 | 1979-02-23 | Magnetic toner for developing electrostatic image |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55113056A true JPS55113056A (en) | 1980-09-01 |
JPS6144309B2 JPS6144309B2 (en) | 1986-10-02 |
Family
ID=12023856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2032179A Granted JPS55113056A (en) | 1979-02-23 | 1979-02-23 | Magnetic toner for developing electrostatic image |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55113056A (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5045639A (en) * | 1973-08-27 | 1975-04-23 | ||
JPS5092137A (en) * | 1973-12-14 | 1975-07-23 | ||
JPS50117432A (en) * | 1974-02-16 | 1975-09-13 | ||
JPS533237A (en) * | 1976-06-29 | 1978-01-12 | Ricoh Co Ltd | One component type developing toner |
US4097620A (en) * | 1977-05-02 | 1978-06-27 | Xerox Corporation | Magnetic toner particle coating process |
JPS5381125A (en) * | 1976-12-27 | 1978-07-18 | Ricoh Co Ltd | Electrophotographic magnetic toner |
JPS53118057A (en) * | 1977-03-25 | 1978-10-16 | Hitachi Metals Ltd | Magnetic toner |
DE2832583A1 (en) * | 1977-07-27 | 1979-02-08 | Minolta Camera Kk | DRY DEVELOPMENT PROCESS FOR ELECTROPHOTOGRAPHY AND DEVELOPMENT MATERIAL FOR IT |
JPS5445135A (en) * | 1977-09-16 | 1979-04-10 | Minolta Camera Co Ltd | Dry type developer for electrography |
JPS55105253A (en) * | 1979-02-07 | 1980-08-12 | Mita Ind Co Ltd | Magnetic developer and its preparation |
-
1979
- 1979-02-23 JP JP2032179A patent/JPS55113056A/en active Granted
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5045639A (en) * | 1973-08-27 | 1975-04-23 | ||
JPS5092137A (en) * | 1973-12-14 | 1975-07-23 | ||
JPS50117432A (en) * | 1974-02-16 | 1975-09-13 | ||
JPS533237A (en) * | 1976-06-29 | 1978-01-12 | Ricoh Co Ltd | One component type developing toner |
JPS5381125A (en) * | 1976-12-27 | 1978-07-18 | Ricoh Co Ltd | Electrophotographic magnetic toner |
JPS53118057A (en) * | 1977-03-25 | 1978-10-16 | Hitachi Metals Ltd | Magnetic toner |
US4097620A (en) * | 1977-05-02 | 1978-06-27 | Xerox Corporation | Magnetic toner particle coating process |
DE2832583A1 (en) * | 1977-07-27 | 1979-02-08 | Minolta Camera Kk | DRY DEVELOPMENT PROCESS FOR ELECTROPHOTOGRAPHY AND DEVELOPMENT MATERIAL FOR IT |
JPS5424632A (en) * | 1977-07-27 | 1979-02-24 | Minolta Camera Co Ltd | Dry developing method in electrophotography |
US4254203A (en) * | 1977-07-27 | 1981-03-03 | Minolta Camera Kabushiki Kaisha | Dry process developing method employing magnetic toner |
JPS5445135A (en) * | 1977-09-16 | 1979-04-10 | Minolta Camera Co Ltd | Dry type developer for electrography |
JPS55105253A (en) * | 1979-02-07 | 1980-08-12 | Mita Ind Co Ltd | Magnetic developer and its preparation |
Also Published As
Publication number | Publication date |
---|---|
JPS6144309B2 (en) | 1986-10-02 |
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