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:
Jul. 30, 2019
Filed:
Feb. 26, 2018
Kyocera Document Solutions Inc., Osaka, JP;
Toshiki Takemori, Osaka, JP;
Kohei Yamauchi, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
An electrostatic latent image developing toner includes a plurality of toner particles containing a non-crystalline polyester resin and a crystalline polyester resin. The toner particles contain as the crystalline polyester resin a dispersoid of crystallized crystalline polyester resin (CPES) domains. The CPES domains of the CPES dispersoid have an aspect ratio of at least 3.40 and no greater than 10.0 in terms of number average value. The toner particles have a roundness of at least 0.950 and no greater than 0.970 in terms of number average value. In a cross-sectional image of each of the toner particles, a ratio of a total area occupied by the CPES dispersoid to a cross-sectional area of the toner particle is at least 10.0% and no greater than 30.0%. The non-crystalline polyester resin includes a repeating unit derived from alkenyl succinic anhydride. The crystalline polyester resin includes a repeating unit derived from n-butyl methacrylate.