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:
Nov. 05, 2019
Filed:
Aug. 11, 2018
Kyocera Document Solutions Inc., Osaka, JP;
Erika Tanaka, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
Toner particles each include a toner mother particle and an external additive. The toner mother particle includes a toner core containing a binder resin and a shell layer covering a surface of the toner core. The external additive includes a plurality of external addition resin particles. The external addition resin particles are each present on a surface of the shell layer. The shell layer contains a specific vinyl resin. The toner core and each resin particle are bonded together through a covalent bond within the shell layer. A detachment rate of the resin particles is lower than 5%. The vinyl resin include constitutional units represented by formulas (1-1) to (1-3). The atomic groups Xand Xincluded in the constitutional units represented by the respective formulas (1-1) and (1-2) are each derived from N-methylol group and represented by —NHCHO—.