US Patent 7785760 Toner and method of preparing the toner
Patent 7785760 was granted and assigned to RICOH COMPANY,LTD. on August, 2010 by the United States Patent and Trademark Office.
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A toner is provided including a binder resin, a colorant, and a release agent, which has a volume average particle diameter (Dv) of from 3 to 9 μm, and wherein the binder resin and the release agent form a sea-island structure in which the island formed of the release agent is dispersed in the sea formed of the binder resin in a cross-sectional image of the toner obtained by a transmission electron microscope (TEM), and the following relationships are satisfied: IB>IA and IB>IC, wherein each of IA, IB, and IC represents an area ratio (%) of the island in an outermost region (A) of the cross-sectional image of the toner, an intermediate region (B) thereof located under the outermost region (A), and an innermost region (C) thereof located under the intermediate region (B); and a method of preparing the toner.
US Patent 07785760 Toner and method of preparing the toner US Patent 7785760 Toner and method of preparing the toner
US Patent 07785760 Toner and method of preparing the toner
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