JPS55135855A - Electrostatic latent image developer - Google Patents
Electrostatic latent image developerInfo
- Publication number
- JPS55135855A JPS55135855A JP4372379A JP4372379A JPS55135855A JP S55135855 A JPS55135855 A JP S55135855A JP 4372379 A JP4372379 A JP 4372379A JP 4372379 A JP4372379 A JP 4372379A JP S55135855 A JPS55135855 A JP S55135855A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- chargeability
- particles
- electrostatic latent
- latent image
- 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
Abstract
PURPOSE: To enable a developer to exhibit superior triboelectricity and always stable chargeability, and to form a sharp image free from fog, by mixing fine particles made by allowing fine colloidal silica particles to be dyed with or to adsorb a charge controlling substance for controlling toner chargeability in positive polarity.
CONSTITUTION: As a substance for controlling toner chargeability in positive polarity, "Suminzole Black AR" (made by SumitomoKagaku KK, oil soluble dye), an azine type dye having 2W16C alkyl group, gilosonite, or the like is adsorbed or attached by dyeing to fine colloidal silica particles, and these particles are mixed with a magnetic toner by 0.05W2% based on the magnetic toner weight to prepare developer 6. Cylindrical sleeve 2 is rotated in the arrow direction around fixed magnet roller 5, the thickness of this developer is adjusted with blade 4, and grounded electroconductive drum 1" provided with photosensitive layer 1' of drum 1 is rotated in the arrow direction at a constant speed to develop an electrostatic latent image.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4372379A JPS55135855A (en) | 1979-04-11 | 1979-04-11 | Electrostatic latent image developer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4372379A JPS55135855A (en) | 1979-04-11 | 1979-04-11 | Electrostatic latent image developer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55135855A true JPS55135855A (en) | 1980-10-23 |
Family
ID=12671704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4372379A Pending JPS55135855A (en) | 1979-04-11 | 1979-04-11 | Electrostatic latent image developer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55135855A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58185405A (en) * | 1982-04-26 | 1983-10-29 | Nippon Aerojiru Kk | Fine powder of surface-modified metal oxide |
JPS59116495A (en) * | 1982-12-20 | 1984-07-05 | 三菱レイヨン株式会社 | Paper coating composition |
JPS59123854A (en) * | 1982-12-28 | 1984-07-17 | Toshiba Corp | Particle to be added to developer and its manufacture |
JPS59157653A (en) * | 1983-02-28 | 1984-09-07 | Mita Ind Co Ltd | Electrostatic photographic recording toner |
US4640882A (en) * | 1983-07-19 | 1987-02-03 | Canon Kabushiki Kaisha | Image forming method of negative latent images using silica particles |
US4828954A (en) * | 1986-08-14 | 1989-05-09 | Fuji Xerox Co., Ltd. | Toner composition with treated inorganic powder |
JPH01142660A (en) * | 1987-11-06 | 1989-06-05 | Xerox Corp | Toner composition containing modified charge promoting additive |
US4965158A (en) * | 1986-08-01 | 1990-10-23 | Xerox Corporation | Toner compositions with modified charge enhancing additives |
US4973540A (en) * | 1988-08-31 | 1990-11-27 | Minolta Camera Kabushiki Kaisha | Developer for electrostatic latent image containing fine particle comprising positively and negatively chargeable polar group |
US5176979A (en) * | 1990-08-21 | 1993-01-05 | Fuji Xerox Co., Ltd. | Electrophotographic toner having a surface treated silica particle |
US5248581A (en) * | 1990-11-22 | 1993-09-28 | Tomoegawa Paper Co., Ltd. | Toner for electrophotography |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5252639A (en) * | 1975-10-27 | 1977-04-27 | Mita Ind Co Ltd | Electrostatic photographic developer |
-
1979
- 1979-04-11 JP JP4372379A patent/JPS55135855A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5252639A (en) * | 1975-10-27 | 1977-04-27 | Mita Ind Co Ltd | Electrostatic photographic developer |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0131442B2 (en) * | 1982-04-26 | 1989-06-26 | Nippon Aerojiru Kk | |
JPS58185405A (en) * | 1982-04-26 | 1983-10-29 | Nippon Aerojiru Kk | Fine powder of surface-modified metal oxide |
JPS59116495A (en) * | 1982-12-20 | 1984-07-05 | 三菱レイヨン株式会社 | Paper coating composition |
JPH0135958B2 (en) * | 1982-12-20 | 1989-07-27 | Mitsubishi Rayon Co | |
JPS59123854A (en) * | 1982-12-28 | 1984-07-17 | Toshiba Corp | Particle to be added to developer and its manufacture |
JPS59157653A (en) * | 1983-02-28 | 1984-09-07 | Mita Ind Co Ltd | Electrostatic photographic recording toner |
US4640882A (en) * | 1983-07-19 | 1987-02-03 | Canon Kabushiki Kaisha | Image forming method of negative latent images using silica particles |
US4965158A (en) * | 1986-08-01 | 1990-10-23 | Xerox Corporation | Toner compositions with modified charge enhancing additives |
US4828954A (en) * | 1986-08-14 | 1989-05-09 | Fuji Xerox Co., Ltd. | Toner composition with treated inorganic powder |
JPH01142660A (en) * | 1987-11-06 | 1989-06-05 | Xerox Corp | Toner composition containing modified charge promoting additive |
US4973540A (en) * | 1988-08-31 | 1990-11-27 | Minolta Camera Kabushiki Kaisha | Developer for electrostatic latent image containing fine particle comprising positively and negatively chargeable polar group |
US5176979A (en) * | 1990-08-21 | 1993-01-05 | Fuji Xerox Co., Ltd. | Electrophotographic toner having a surface treated silica particle |
US5248581A (en) * | 1990-11-22 | 1993-09-28 | Tomoegawa Paper Co., Ltd. | Toner for electrophotography |
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