JPS55135855A - Electrostatic latent image developer - Google Patents

Electrostatic latent image developer

Info

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
Application number
JP4372379A
Other languages
Japanese (ja)
Inventor
Yoshio Takasu
Yasuo Mihashi
Kyosuke Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP4372379A priority Critical patent/JPS55135855A/en
Publication of JPS55135855A publication Critical patent/JPS55135855A/en
Pending legal-status Critical Current

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
JP4372379A 1979-04-11 1979-04-11 Electrostatic latent image developer Pending JPS55135855A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5252639A (en) * 1975-10-27 1977-04-27 Mita Ind Co Ltd Electrostatic photographic developer

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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