JPS57191650A - Electrophotographic dry type developer - Google Patents

Electrophotographic dry type developer

Info

Publication number
JPS57191650A
JPS57191650A JP56076780A JP7678081A JPS57191650A JP S57191650 A JPS57191650 A JP S57191650A JP 56076780 A JP56076780 A JP 56076780A JP 7678081 A JP7678081 A JP 7678081A JP S57191650 A JPS57191650 A JP S57191650A
Authority
JP
Japan
Prior art keywords
toner
carrier
combining
type
long
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
Application number
JP56076780A
Other languages
Japanese (ja)
Other versions
JPH0355823B2 (en
Inventor
Satoru Inoue
Kimitoshi Yamaguchi
Katsuomi Kobayashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56076780A priority Critical patent/JPS57191650A/en
Publication of JPS57191650A publication Critical patent/JPS57191650A/en
Publication of JPH0355823B2 publication Critical patent/JPH0355823B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
    • G03G9/1132—Macromolecular components of coatings
    • G03G9/1135—Macromolecular components of coatings obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/1136—Macromolecular components of coatings obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon atoms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/09—Colouring agents for toner particles
    • G03G9/0906—Organic dyes
    • G03G9/091—Azo dyes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a long-lived dry tye developer capable of charging a toner uniformly and sufficiently to a negative polarity, by combining a carrier coated on the surface by a specified silicone resin with a toner containing a metallic complex salt type monoazo dye soluble in an organic solvent. CONSTITUTION:A silicone resin film is formed by adding a toluene or the like solution of a silicon resin of a baking type or a room temperature curable type represented by the formulaI(in which R is H, halogen, hydroxy, methoxy, 1-4C lower alkyl, or phenyl) to a carrier of iron powder or the like by the fluidization method or the like. On the other hand, a toner is prepared by adding a metallic complex type monoazo dye represented by the formula II and carbon black, etc. to polystyrene or its copolymer. A developer obtained by combining said carrier with said toner does not become ''spent'', that is, does not cause deterioration of chargeability due to attachment of the toner resin to the surface of the carrier and formation of a film, after long-term uses, and has high durability.
JP56076780A 1981-05-22 1981-05-22 Electrophotographic dry type developer Granted JPS57191650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56076780A JPS57191650A (en) 1981-05-22 1981-05-22 Electrophotographic dry type developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56076780A JPS57191650A (en) 1981-05-22 1981-05-22 Electrophotographic dry type developer

Publications (2)

Publication Number Publication Date
JPS57191650A true JPS57191650A (en) 1982-11-25
JPH0355823B2 JPH0355823B2 (en) 1991-08-26

Family

ID=13615104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56076780A Granted JPS57191650A (en) 1981-05-22 1981-05-22 Electrophotographic dry type developer

Country Status (1)

Country Link
JP (1) JPS57191650A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124349A (en) * 1982-12-29 1984-07-18 Fujitsu Ltd Carrier for developer for magnetic brush system
US4584254A (en) * 1984-03-27 1986-04-22 Ricoh Company, Ltd. Silicone resin coated carrier particles for use in a two-component dry-type developer
US4590141A (en) * 1982-04-08 1986-05-20 Ricoh Company Carrier particles for use in a two-component dry-type developer for developing latent electrostatic images
JPS61204643A (en) * 1985-03-08 1986-09-10 Ricoh Co Ltd Carrier for electrostatic latent image developer
US5166041A (en) * 1990-07-23 1992-11-24 Showa Denko K.K. Near infrared ray-decolorizable recording material
US5230980A (en) * 1989-12-26 1993-07-27 Xerox Corporation Treating carrier particles with coatings containing charge enhancing additives
US5846682A (en) * 1993-03-02 1998-12-08 Showa Denko K.K. Light decolorizable recording material, ink and toner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4927229A (en) * 1972-07-01 1974-03-11
JPS52123622A (en) * 1976-04-09 1977-10-18 Canon Inc Developing agent mixture
JPS55127569A (en) * 1979-03-24 1980-10-02 Konishiroku Photo Ind Co Ltd Carrier for electrostatic image development

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4927229A (en) * 1972-07-01 1974-03-11
JPS52123622A (en) * 1976-04-09 1977-10-18 Canon Inc Developing agent mixture
JPS55127569A (en) * 1979-03-24 1980-10-02 Konishiroku Photo Ind Co Ltd Carrier for electrostatic image development

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590141A (en) * 1982-04-08 1986-05-20 Ricoh Company Carrier particles for use in a two-component dry-type developer for developing latent electrostatic images
JPS59124349A (en) * 1982-12-29 1984-07-18 Fujitsu Ltd Carrier for developer for magnetic brush system
US4584254A (en) * 1984-03-27 1986-04-22 Ricoh Company, Ltd. Silicone resin coated carrier particles for use in a two-component dry-type developer
JPS61204643A (en) * 1985-03-08 1986-09-10 Ricoh Co Ltd Carrier for electrostatic latent image developer
US5230980A (en) * 1989-12-26 1993-07-27 Xerox Corporation Treating carrier particles with coatings containing charge enhancing additives
US5166041A (en) * 1990-07-23 1992-11-24 Showa Denko K.K. Near infrared ray-decolorizable recording material
US5846682A (en) * 1993-03-02 1998-12-08 Showa Denko K.K. Light decolorizable recording material, ink and toner

Also Published As

Publication number Publication date
JPH0355823B2 (en) 1991-08-26

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