JPS57172349A - Electrophotographic dry development method - Google Patents

Electrophotographic dry development method

Info

Publication number
JPS57172349A
JPS57172349A JP56056962A JP5696281A JPS57172349A JP S57172349 A JPS57172349 A JP S57172349A JP 56056962 A JP56056962 A JP 56056962A JP 5696281 A JP5696281 A JP 5696281A JP S57172349 A JPS57172349 A JP S57172349A
Authority
JP
Japan
Prior art keywords
toner
pts
carrier
hereafter
carbon black
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
JP56056962A
Other languages
Japanese (ja)
Inventor
Mitsuru Uchida
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 JP56056962A priority Critical patent/JPS57172349A/en
Publication of JPS57172349A publication Critical patent/JPS57172349A/en
Pending 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
    • G03G9/1133—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/1134—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds containing fluorine atoms

Landscapes

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

Abstract

PURPOSE:To obtain always a vivid image, by using a high chargeable toner as toners for copy start and initial supply and using a low charageable toner as a toner for supply hereafter in the developing method using a two-component developer containing a fluoropolymer coated carrier. CONSTITUTION:In a tw-component type developing method where a fluoro-polymer is coated on the surface of a carrier to prevent toner fine particles from sticking to the surface of the carrier, a high chargeable toner such as a toner consisting of 90wt.pts. styrene resin, 8wt.pts. carbon black, and 2wt.pts. nigrosine SB is used in the initial copy from the copy start to about 3,000 copies, and a low chargeable toner consisting of 85wt.pts. styrene resin and 15wt.pts. carbon black is supplied hereafter. Thus, a desired charge quantity is always kept, and vivid images are obtained even if copying is performed for a long time continously or intermittently.
JP56056962A 1981-04-17 1981-04-17 Electrophotographic dry development method Pending JPS57172349A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56056962A JPS57172349A (en) 1981-04-17 1981-04-17 Electrophotographic dry development method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56056962A JPS57172349A (en) 1981-04-17 1981-04-17 Electrophotographic dry development method

Publications (1)

Publication Number Publication Date
JPS57172349A true JPS57172349A (en) 1982-10-23

Family

ID=13042155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56056962A Pending JPS57172349A (en) 1981-04-17 1981-04-17 Electrophotographic dry development method

Country Status (1)

Country Link
JP (1) JPS57172349A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614165A (en) * 1985-11-25 1986-09-30 Xerox Corporation Extended life development system
JPH0222667A (en) * 1988-05-02 1990-01-25 Xerox Corp Holding of friction charge stability for electrophotographic developing agent
JPH02198456A (en) * 1989-01-27 1990-08-06 Sharp Corp Toner for electrophotography

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614165A (en) * 1985-11-25 1986-09-30 Xerox Corporation Extended life development system
JPH0222667A (en) * 1988-05-02 1990-01-25 Xerox Corp Holding of friction charge stability for electrophotographic developing agent
JPH02198456A (en) * 1989-01-27 1990-08-06 Sharp Corp Toner for electrophotography

Similar Documents

Publication Publication Date Title
EP0401020A3 (en) Developing devices for use in electrophotographic apparatus
JPS57188061A (en) Electrophotographing device
WO1993009475A3 (en) Developing device using two-component developer
JPS55161261A (en) Toner replenishing method and its device
DE3569841D1 (en) Method of color electrophotography
JPS5532073A (en) Electrophotographic developing method
JPS57172349A (en) Electrophotographic dry development method
GB1482037A (en) Apparatus for and a method of photoconductor cleaning in a xerographic copier
JPS55157755A (en) Developing method
JPS54109842A (en) Information recorder
GB1017682A (en) Improvements in xerography
JPS57661A (en) Electrostatic latent image developing method
US3057324A (en) Xerographic developing apparatus
JPS5267640A (en) Method for developing charge latent image in electronic photography
JPS5652760A (en) Dichromic electrophotographic method
JPS54150135A (en) Developing device of electrophotographic copiers and others
JPS57119378A (en) Multicolor electrophotographic method
JPS55144265A (en) Developing method for electrostatic latent image
JPS59129883A (en) Developing device
JPS557769A (en) Electrostatic latent image developing method
JPS5583058A (en) Electrostatic latent image development method
JPS5368234A (en) Electrostatic charge developing negatively charging toner
JPS56143467A (en) Copying apparatus
JPS547337A (en) Two-color copying method
JPS54126550A (en) Static latent image developing apparatus