JPS54158931A - Magnetic toner - Google Patents

Magnetic toner

Info

Publication number
JPS54158931A
JPS54158931A JP6741578A JP6741578A JPS54158931A JP S54158931 A JPS54158931 A JP S54158931A JP 6741578 A JP6741578 A JP 6741578A JP 6741578 A JP6741578 A JP 6741578A JP S54158931 A JPS54158931 A JP S54158931A
Authority
JP
Japan
Prior art keywords
over
long axis
toner
magnetic powder
coercive force
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
JP6741578A
Other languages
Japanese (ja)
Inventor
Seiji Tomari
Masashi Kiuchi
Yasuo Mihashi
Yasuyuki Tamura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP6741578A priority Critical patent/JPS54158931A/en
Publication of JPS54158931A publication Critical patent/JPS54158931A/en
Pending legal-status Critical Current

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  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE: To make possible powerful stirring of toner particles so as to enable developing to be performed stably and well without depending upon temperature, humidity, etc. by orienting the needle crystal magnetic powder in a toner binder in the long axis direction thereby increasing coercive force.
CONSTITUTION: A suitable toner binder 10 and preferably 20 to 60wt% based on the weight of toner of needle crystal magnetic powder 11 of needle ratio (long axis length/short axis length) 2/1 or over, preferably 3/1 or over, long axis diameter preferably 0.1 to 1μ, coercive force 270Oe or over, preferably 400Oe or over, are kneaded, if necessary, together with coloring agents, or charge control agents, fixing aids, etc. While the kneaded mixture being passed through a fine passageway such as the discharge port of an extruder, in a fluid state, it is applied with magnetic fields in the flow direction to be oriented of the magnetic powder 11 in the long axis direction, after which it is made to magnetic toner 9 of preferably about 1 to 40μ in particle size. Further the magnetic powder 11 is sufficiently magnetized.
COPYRIGHT: (C)1979,JPO&Japio
JP6741578A 1978-06-05 1978-06-05 Magnetic toner Pending JPS54158931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6741578A JPS54158931A (en) 1978-06-05 1978-06-05 Magnetic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6741578A JPS54158931A (en) 1978-06-05 1978-06-05 Magnetic toner

Publications (1)

Publication Number Publication Date
JPS54158931A true JPS54158931A (en) 1979-12-15

Family

ID=13344250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6741578A Pending JPS54158931A (en) 1978-06-05 1978-06-05 Magnetic toner

Country Status (1)

Country Link
JP (1) JPS54158931A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724950A (en) * 1980-07-22 1982-02-09 Fuji Xerox Co Ltd Magnetic toner composition
JPH0215273A (en) * 1988-03-25 1990-01-18 Fuji Xerox Co Ltd Magnetic toner composition

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465541A (en) * 1977-11-02 1979-05-26 Hitachi Metals Ltd Magnetic toner and making method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465541A (en) * 1977-11-02 1979-05-26 Hitachi Metals Ltd Magnetic toner and making method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724950A (en) * 1980-07-22 1982-02-09 Fuji Xerox Co Ltd Magnetic toner composition
JPS6354174B2 (en) * 1980-07-22 1988-10-27 Fuji Xerox Co Ltd
JPH0215273A (en) * 1988-03-25 1990-01-18 Fuji Xerox Co Ltd Magnetic toner composition

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