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US Patent 10545420 Magnetic toner and image-forming method

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Contents

Is a
Patent
Patent
0

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
105454200
Patent Inventor Names
Kenji Ookubo0
Kosuke Fukudome0
Tomohisa Sano0
Yoshitaka Suzumura0
Yusuke Hasegawa0
Takuma Ikejiri0
Tetsuya Kinumatsu0
Date of Patent
January 28, 2020
0
Patent Application Number
160184200
Date Filed
June 26, 2018
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Patent Citations
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US Patent 10012923 Toner
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Patent Citations Received
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US Patent 12111614 Toner
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US Patent 10845722 Toner and method for producing toner
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US Patent 10877387 Magnetic toner
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US Patent 11003103 Toner
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US Patent 11249412 Toner
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US Patent 11714363 Toner
0
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US Patent 11333989 Toner
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US Patent 11835874 Toner
0
...
Patent Primary Examiner
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Janis L. Dote
0
Patent abstract

A magnetic toner is provided, which has a magnetic toner particle containing a binder resin, a wax, and a magnetic body, wherein, when Dn is a number-average particle diameter of the toner, CV1 is coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn −0.500 to +0.500, and CV2 is coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn −1.500 to −0.500, a relationship CV2/CV1≤1.00 is satisfied; an average brightness of the toner in the range of Dn −0.500 to +0.500 is 30.0 to 60.0; and when, in a cross section of the toner observed using a transmission electron microscope, which is divided with a square grid having a side of 0.8 μm, coefficient of variation CV3 of an occupied area percentage for the magnetic body is 40.0 to 80.0%.

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