JPS57129444A - Production of magnetic toner - Google Patents

Production of magnetic toner

Info

Publication number
JPS57129444A
JPS57129444A JP56014814A JP1481481A JPS57129444A JP S57129444 A JPS57129444 A JP S57129444A JP 56014814 A JP56014814 A JP 56014814A JP 1481481 A JP1481481 A JP 1481481A JP S57129444 A JPS57129444 A JP S57129444A
Authority
JP
Japan
Prior art keywords
magnetic toner
particles
parent body
parent
body particles
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
JP56014814A
Other languages
Japanese (ja)
Other versions
JPS6333696B2 (en
Inventor
Kazuhiko Nasu
Tadashi Sakairi
Akira Minobe
Yoshi Omura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11871501&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPS57129444(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56014814A priority Critical patent/JPS57129444A/en
Priority to DE8282300538T priority patent/DE3270929D1/en
Priority to EP19820300538 priority patent/EP0057613B1/en
Publication of JPS57129444A publication Critical patent/JPS57129444A/en
Publication of JPS6333696B2 publication Critical patent/JPS6333696B2/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
    • G03G9/0802—Preparation methods
    • G03G9/0808—Preparation methods by dry mixing the toner components in solid or softened state

Landscapes

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

Abstract

PURPOSE: To disperse conductive particles uniformly on the surfaces of the parent body particles of a magnetic toner by sticking the conductive particles on the surfaces of said parent body particles in the state in which said surfaces are kept elevated to the m.p. or below and the softening point or above by high- speed agitation.
CONSTITUTION: For example, the magnetic toner prior to formation of conductive layers (parent particles of a magnetic toner) is agitated at high speeds of 200W2,000m/min peripheral speeds in an agitating tank by using a super mixer, whereby it is heated up to 45W50°C (above the softening point of said parent body particles) by the heat evolution effect among the parent body particles of the magnetic toner or between an impeller and a tank wall. Thence, a resistance control agent, for example, carbon black which is conductive particles is added at 1W5wt% and is uniformly dispersed and coated again by the high-speed agitation.
COPYRIGHT: (C)1982,JPO&Japio
JP56014814A 1981-02-03 1981-02-03 Production of magnetic toner Granted JPS57129444A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56014814A JPS57129444A (en) 1981-02-03 1981-02-03 Production of magnetic toner
DE8282300538T DE3270929D1 (en) 1981-02-03 1982-02-02 Method for making magnetic toner
EP19820300538 EP0057613B1 (en) 1981-02-03 1982-02-02 Method for making magnetic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56014814A JPS57129444A (en) 1981-02-03 1981-02-03 Production of magnetic toner

Publications (2)

Publication Number Publication Date
JPS57129444A true JPS57129444A (en) 1982-08-11
JPS6333696B2 JPS6333696B2 (en) 1988-07-06

Family

ID=11871501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56014814A Granted JPS57129444A (en) 1981-02-03 1981-02-03 Production of magnetic toner

Country Status (3)

Country Link
EP (1) EP0057613B1 (en)
JP (1) JPS57129444A (en)
DE (1) DE3270929D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63244057A (en) * 1987-03-31 1988-10-11 Canon Inc Production of electrostatic charge image developing toner
JPS63244056A (en) * 1987-03-31 1988-10-11 Canon Inc Production of electrostatic charge image developing toner
JPH0299972A (en) * 1988-10-07 1990-04-11 Tomoegawa Paper Co Ltd Production of toner for electrostatic charge image

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0390527B1 (en) * 1989-03-29 1996-02-21 Bando Chemical Industries, Limited Toners for use in electrophotography and production thereof
JP3363495B2 (en) * 1991-12-04 2003-01-08 キヤノン株式会社 Manufacturing method of toner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU499347B2 (en) * 1975-11-06 1979-04-12 Subligraphics S.A. Spray dried magnetic developer
US4199614A (en) * 1976-08-02 1980-04-22 Xerox Corporation Transparent colored magnetic materials and electrostatographic process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63244057A (en) * 1987-03-31 1988-10-11 Canon Inc Production of electrostatic charge image developing toner
JPS63244056A (en) * 1987-03-31 1988-10-11 Canon Inc Production of electrostatic charge image developing toner
JPH0545954B2 (en) * 1987-03-31 1993-07-12 Canon Kk
JPH0299972A (en) * 1988-10-07 1990-04-11 Tomoegawa Paper Co Ltd Production of toner for electrostatic charge image

Also Published As

Publication number Publication date
EP0057613A1 (en) 1982-08-11
EP0057613B1 (en) 1986-05-07
JPS6333696B2 (en) 1988-07-06
DE3270929D1 (en) 1986-06-12

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