JPS56149052A - Developer - Google Patents

Developer

Info

Publication number
JPS56149052A
JPS56149052A JP5309180A JP5309180A JPS56149052A JP S56149052 A JPS56149052 A JP S56149052A JP 5309180 A JP5309180 A JP 5309180A JP 5309180 A JP5309180 A JP 5309180A JP S56149052 A JPS56149052 A JP S56149052A
Authority
JP
Japan
Prior art keywords
carrier
toner
particle size
mixed
developer
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
JP5309180A
Other languages
Japanese (ja)
Inventor
Yoshisuke Takekida
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5309180A priority Critical patent/JPS56149052A/en
Publication of JPS56149052A publication Critical patent/JPS56149052A/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
    • G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/108—Ferrite carrier, e.g. magnetite

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a developer giving printing quality with high resolution and contg. a carrier having a long life by mixing finely powdered toner with the carrier having larger and smaller two particle size distributions which are about equal to or smaller than the particle size distribution of the toner. CONSTITUTION:A finely powdered toner having 10-15mum particle size is used. An Fe base material such as Fe2O3 having 10-15mum particle size and that having 2- 5mum particle size are used as the 1st and 2nd carriers, respectively. The 2nd carrier is added to the 1st carrier by several wt% and mixed. The mixed carrier is then mixed with said toner to prepare a developer for electrostatic photography. The 2nd carrier improves the fluidity and transferrability of the toner, enhances the resolution synthetically, and contributes to the prevention of ground stain. By selecting the resistance values of the 1st and 2nd carriers, charges can be applied to the toner by a stable quantity.
JP5309180A 1980-04-22 1980-04-22 Developer Pending JPS56149052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5309180A JPS56149052A (en) 1980-04-22 1980-04-22 Developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5309180A JPS56149052A (en) 1980-04-22 1980-04-22 Developer

Publications (1)

Publication Number Publication Date
JPS56149052A true JPS56149052A (en) 1981-11-18

Family

ID=12933106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5309180A Pending JPS56149052A (en) 1980-04-22 1980-04-22 Developer

Country Status (1)

Country Link
JP (1) JPS56149052A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61143775A (en) * 1984-12-17 1986-07-01 Tomoegawa Paper Co Ltd Electrophotographic developer
JPS62119552A (en) * 1985-11-20 1987-05-30 Mitsubishi Chem Ind Ltd Electrophotographic developer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61143775A (en) * 1984-12-17 1986-07-01 Tomoegawa Paper Co Ltd Electrophotographic developer
JPS62119552A (en) * 1985-11-20 1987-05-30 Mitsubishi Chem Ind Ltd Electrophotographic developer

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