JPS5548754A - Magnetic toner for electrostatic charge latent image development - Google Patents
Magnetic toner for electrostatic charge latent image developmentInfo
- Publication number
- JPS5548754A JPS5548754A JP12226378A JP12226378A JPS5548754A JP S5548754 A JPS5548754 A JP S5548754A JP 12226378 A JP12226378 A JP 12226378A JP 12226378 A JP12226378 A JP 12226378A JP S5548754 A JPS5548754 A JP S5548754A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- magnetic
- magnetic toner
- toner particles
- fine particles
- 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 the dry type developer (magnetic toner) which is used for the electrophotographic apparatus whose conductive sleeve for development is grounded with high resistance and which is capable of forming good images by covering magnetic toner particles with the specific non-magnetic fine particle groups.
CONSTITUTION: Ferromagnetic material fine particles such as iron, cobalt, ferrite or other, waxes, thermosplastic resins such as styrene base resins or other and pigments and dyes are kneaded and melted, and the mixture is cooled and pulverized, whereby the magnetic toner particles being fine powder are formed. Next, non-magnetic fine particles having electrical insulation characteristic of grain sizes smaller than those of the above-mentioned toner particles (preferably oil-soluble dyes, gold-contained dye particles, etc.) (A) and conductive non-magnetic fine particles (preferably graphite, metal powder, etc.) (B) are added at about 0.01W3wt% (however, A is used more than B) based on the weight of the above-mentioned toner particles and are deposited on their surfaces, whereby the dry type developer (magnetic toner) is obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12226378A JPS5548754A (en) | 1978-10-04 | 1978-10-04 | Magnetic toner for electrostatic charge latent image development |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12226378A JPS5548754A (en) | 1978-10-04 | 1978-10-04 | Magnetic toner for electrostatic charge latent image development |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5548754A true JPS5548754A (en) | 1980-04-08 |
JPS6325333B2 JPS6325333B2 (en) | 1988-05-25 |
Family
ID=14831619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12226378A Granted JPS5548754A (en) | 1978-10-04 | 1978-10-04 | Magnetic toner for electrostatic charge latent image development |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548754A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57120942A (en) * | 1981-01-21 | 1982-07-28 | Canon Inc | Heat treatment of toner |
US4911100A (en) * | 1987-03-31 | 1990-03-27 | Hitachi Metals, Ltd. | Developing apparatus |
US5053305A (en) * | 1988-09-07 | 1991-10-01 | Tdk Corporation | Composition and method for developing electrostatic latent images |
US6594462B2 (en) * | 2000-03-15 | 2003-07-15 | Canon Kabushiki Kaisha | Developing apparatus using toner with conductive particles |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51101535A (en) * | 1975-03-04 | 1976-09-08 | Toyo Ink Mfg Co | |
JPS51126836A (en) * | 1975-04-26 | 1976-11-05 | Shigekazu Enoki | Magnetic toner |
JPS529435A (en) * | 1975-07-07 | 1977-01-25 | Oce Van Der Grinten Nv | Tonor powder and method of manufacturing the same |
JPS5219535A (en) * | 1975-08-06 | 1977-02-14 | Ricoh Co Ltd | Dry type developing powder |
JPS52145224A (en) * | 1976-05-28 | 1977-12-03 | Ricoh Co Ltd | Dry type developing powder |
JPS5381126A (en) * | 1976-12-27 | 1978-07-18 | Ricoh Co Ltd | Electrophotographic magnetic toner |
JPS5387734A (en) * | 1977-01-13 | 1978-08-02 | Ricoh Co Ltd | Electrophotographic magnetic toner |
-
1978
- 1978-10-04 JP JP12226378A patent/JPS5548754A/en active Granted
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51101535A (en) * | 1975-03-04 | 1976-09-08 | Toyo Ink Mfg Co | |
JPS51126836A (en) * | 1975-04-26 | 1976-11-05 | Shigekazu Enoki | Magnetic toner |
JPS529435A (en) * | 1975-07-07 | 1977-01-25 | Oce Van Der Grinten Nv | Tonor powder and method of manufacturing the same |
JPS5219535A (en) * | 1975-08-06 | 1977-02-14 | Ricoh Co Ltd | Dry type developing powder |
JPS52145224A (en) * | 1976-05-28 | 1977-12-03 | Ricoh Co Ltd | Dry type developing powder |
JPS5381126A (en) * | 1976-12-27 | 1978-07-18 | Ricoh Co Ltd | Electrophotographic magnetic toner |
JPS5387734A (en) * | 1977-01-13 | 1978-08-02 | Ricoh Co Ltd | Electrophotographic magnetic toner |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57120942A (en) * | 1981-01-21 | 1982-07-28 | Canon Inc | Heat treatment of toner |
JPH0117576B2 (en) * | 1981-01-21 | 1989-03-31 | Canon Kk | |
US4911100A (en) * | 1987-03-31 | 1990-03-27 | Hitachi Metals, Ltd. | Developing apparatus |
US5053305A (en) * | 1988-09-07 | 1991-10-01 | Tdk Corporation | Composition and method for developing electrostatic latent images |
US6594462B2 (en) * | 2000-03-15 | 2003-07-15 | Canon Kabushiki Kaisha | Developing apparatus using toner with conductive particles |
Also Published As
Publication number | Publication date |
---|---|
JPS6325333B2 (en) | 1988-05-25 |
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