The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 2009
Filed:
Jun. 19, 2008
Yasuhito Yuasa, Katano, JP;
Mamoru Soga, Tondabayashi, JP;
Hidekazu Arase, Kobe, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Toner of the present invention includes aggregated particles formed by aggregating at least resin particles, pigment particles, and wax particles in an aqueous medium in the presence of a water-soluble inorganic salt. The wax includes at least one selected from the following: ester wax that has an iodine value of not more than 25, a saponification value of 30 to 300, and an endothermic peak temperature (melting point) of 50° C. to 100° C. based on a DSC method; and wax that is obtained by a reaction of alkyl alcohol having a carbon number of 4 to 30, unsaturated polycarboxylic acid or its anhydride, and synthetic hydrocarbon wax, and has an acid value of 1 to 80 mgKOH/g and an endothermic peak temperature (melted point) of 50° C. to 120° C. based on the DSC method. The toner and a two-component developer can achieve oilless fixing that prevents offset without using oil while maintaining high OHP transmittance, can eliminate spent of the toner components on a carrier to make the life longer, and can ensure high transfer efficiency by suppressing transfer voids or scattering during transfer.