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JPS55135854A - Electrostatic latent image developer - Google Patents

Electrostatic latent image developer

Info

Publication number
JPS55135854A
JPS55135854A JP4372279A JP4372279A JPS55135854A JP S55135854 A JPS55135854 A JP S55135854A JP 4372279 A JP4372279 A JP 4372279A JP 4372279 A JP4372279 A JP 4372279A JP S55135854 A JPS55135854 A JP S55135854A
Authority
JP
Japan
Prior art keywords
developer
drum
chargeability
electrostatic latent
rotated
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
JP4372279A
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 JP4372279A priority Critical patent/JPS55135854A/en
Publication of JPS55135854A publication Critical patent/JPS55135854A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)

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 negative polarity.
CONSTITUTION: A compound represented by the formula, etc., a metal complex of salicylic acid or so, or the like is attached by dyeing, or adsorbed to colloidal silica as a substance for controlling toner chargeability negative polarity, and these particles are added to a magnetic toner prepard separately by 0.05W2% by weight to form a developer. For example, cylindrical sleeve 2 is rotated in the arrow direction, electrophotographic sensitive layer 1' of photosensitive drum 1 is provided with electroconductive drum 1'' grounded, the drum is rotated at a constant speed in the arrow direction to develop an electrostatic latent image using this developer. Multipolar magnetic roller 5 is fixed. A superior image is thus obtained even under conditions of high temperature and high humidity.
COPYRIGHT: (C)1980,JPO&Japio
JP4372279A 1979-04-11 1979-04-11 Electrostatic latent image developer Pending JPS55135854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4372279A JPS55135854A (en) 1979-04-11 1979-04-11 Electrostatic latent image developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4372279A JPS55135854A (en) 1979-04-11 1979-04-11 Electrostatic latent image developer

Publications (1)

Publication Number Publication Date
JPS55135854A true JPS55135854A (en) 1980-10-23

Family

ID=12671676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4372279A Pending JPS55135854A (en) 1979-04-11 1979-04-11 Electrostatic latent image developer

Country Status (1)

Country Link
JP (1) JPS55135854A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123854A (en) * 1982-12-28 1984-07-17 Toshiba Corp Particle to be added to developer and its manufacture
US4624907A (en) * 1984-11-05 1986-11-25 Hodogaya Chemical Co., Ltd. Electrophotographic toner containing metal complex
JPS62258472A (en) * 1986-05-01 1987-11-10 Sharp Corp Developer for electrostatic copying machine
US4734350A (en) * 1986-12-29 1988-03-29 Xerox Corporation Positively charged developer compositions with modified charge enhancing additives containing amino alcohols
US4857432A (en) * 1987-05-18 1989-08-15 Canon Kabushiki Kaisha Toner for developing electrostatic charge image
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
US5288580A (en) * 1991-12-23 1994-02-22 Xerox Corporation Toner and processes thereof

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 (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123854A (en) * 1982-12-28 1984-07-17 Toshiba Corp Particle to be added to developer and its manufacture
US4624907A (en) * 1984-11-05 1986-11-25 Hodogaya Chemical Co., Ltd. Electrophotographic toner containing metal complex
JPS62258472A (en) * 1986-05-01 1987-11-10 Sharp Corp Developer for electrostatic copying machine
US4965158A (en) * 1986-08-01 1990-10-23 Xerox Corporation Toner compositions with modified charge enhancing additives
US4734350A (en) * 1986-12-29 1988-03-29 Xerox Corporation Positively charged developer compositions with modified charge enhancing additives containing amino alcohols
US4857432A (en) * 1987-05-18 1989-08-15 Canon Kabushiki Kaisha Toner for developing electrostatic charge image
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
US5288580A (en) * 1991-12-23 1994-02-22 Xerox Corporation Toner and processes thereof

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