Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takahiro Bito0
Takeshi Satoh0
Tatsuo Imafuku0
Date of Patent
October 25, 2011
Patent Application Number
12184680
Date Filed
August 1, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
A toner comprising a small-particle diameter external additive having a number average particle diameter of 7 to 20 nm, a large-particle diameter external additive having a number average particle diameter of 40 to 80 nm and a toner particle having a volume average particle diameter of 4 to 7 μm, wherein the large-particle diameter external additive is stuck to the surface of the toner particles in a semi-embedded state and has a rate of liberation of 0.1% by weight or less from the surface of the toner particle.
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