Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Akira Sugiyama0
Katsuyuki Nonaka0
Koji Abe0
Naoya Isono0
Satoshi Handa0
Yasuhiro Hashimoto0
Yuhei Terui0
Date of Patent
February 5, 2013
Patent Application Number
12812869
Date Filed
February 24, 2009
Patent Citations Received
Patent Primary Examiner
Patent abstract
A toner is provided which is excellent in development stability in both a low-temperature, low-humidity environment and a high-temperature, high-humidity environment over a long time period. The toner includes toner particles containing at least a binder resin and a colorant, and a fatty acid metal salt. The fatty acid metal salt has a volume-based median diameter (D50s) of 0.15 μm or more and 0.65 μm or less, and the liberation ratio of the fatty acid metal salt in the toner is 1.0% or more and 25.0% or less.
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