JPS57128347A - Toner for electrophotographic dry type developer - Google Patents

Toner for electrophotographic dry type developer

Info

Publication number
JPS57128347A
JPS57128347A JP56013848A JP1384881A JPS57128347A JP S57128347 A JPS57128347 A JP S57128347A JP 56013848 A JP56013848 A JP 56013848A JP 1384881 A JP1384881 A JP 1384881A JP S57128347 A JPS57128347 A JP S57128347A
Authority
JP
Japan
Prior art keywords
toner
grain sizes
average grain
concn
size distributions
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
JP56013848A
Other languages
Japanese (ja)
Other versions
JPS6353542B2 (en
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 JP56013848A priority Critical patent/JPS57128347A/en
Publication of JPS57128347A publication Critical patent/JPS57128347A/en
Publication of JPS6353542B2 publication Critical patent/JPS6353542B2/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
    • G03G9/0819—Developers with toner particles characterised by the dimensions of the particles

Landscapes

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

Abstract

PURPOSE:To obtain a toner suited for a dry type copying machine using a toner concn. sensor which detects the reflectivity of the developer by so controlling the grain size distributions of toner particles as to satisfy the specific relations between the number average grain sizes and volume average grain sizes of particles. CONSTITUTION:The toner of the sharp grain size distributions wherein number average grain sizes Xn are 7.0-11.0mu and the ratio between volume average grain sizes Xw and said Xn is <=1.25 is made by such a method of kneading, for example, 90pts.wt. a methyl methacrylate resin and 10pts.wt. carbon black with heat rolls then cooling the mixture, grinding the same with a jet grinder, thence removing coarse powder with a zigzag classifier then increasing the number of revolutions and removing the fine powder. This toner sticks uniformly on carriers without deviation owing to grain sizes, and does not fluctuate in toner grain size distributions. Since the concn. of the toner is detected with good accuracy and the concn. is controlled well, always stable images are obtained even in the copying cycle of a long time.
JP56013848A 1981-02-03 1981-02-03 Toner for electrophotographic dry type developer Granted JPS57128347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56013848A JPS57128347A (en) 1981-02-03 1981-02-03 Toner for electrophotographic dry type developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56013848A JPS57128347A (en) 1981-02-03 1981-02-03 Toner for electrophotographic dry type developer

Publications (2)

Publication Number Publication Date
JPS57128347A true JPS57128347A (en) 1982-08-09
JPS6353542B2 JPS6353542B2 (en) 1988-10-24

Family

ID=11844692

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56013848A Granted JPS57128347A (en) 1981-02-03 1981-02-03 Toner for electrophotographic dry type developer

Country Status (1)

Country Link
JP (1) JPS57128347A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945452A (en) * 1982-09-09 1984-03-14 Konishiroku Photo Ind Co Ltd Electrostatic image developer
EP0708378A3 (en) * 1994-10-05 1996-05-01 Canon Kabushiki Kaisha Two-component type developer, developing method and image forming method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4868235A (en) * 1971-12-17 1973-09-18
JPS5017259A (en) * 1973-06-12 1975-02-24

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4868235A (en) * 1971-12-17 1973-09-18
JPS5017259A (en) * 1973-06-12 1975-02-24

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945452A (en) * 1982-09-09 1984-03-14 Konishiroku Photo Ind Co Ltd Electrostatic image developer
JPH0127418B2 (en) * 1982-09-09 1989-05-29 Konishiroku Photo Ind
EP0708378A3 (en) * 1994-10-05 1996-05-01 Canon Kabushiki Kaisha Two-component type developer, developing method and image forming method

Also Published As

Publication number Publication date
JPS6353542B2 (en) 1988-10-24

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