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:
Feb. 19, 2019
Filed:
Sep. 15, 2017
Kyocera Document Solutions Inc., Osaka, JP;
Masaki Okita, Osaka, JP;
Hiroki Uemura, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
Cores of toner particles contain a non-crystalline polyester resin, a carnauba wax, and a crystalline polyester resin (polymer of monomers including alcohol, carboxylic acid, styrene-based monomer, and acrylic acid-based monomer) having an SP value ((cal/cm)) of at least 10 and no greater than 11. Shell layers each include a resin film mainly constituted by a complex of resin particles having a glass transition point of at least 50° C. and no greater than 100° C. A Ru-dyed ratio of the toner particles in a state in which no external additive is present is at least 50% and no greater than 80%. An intensity of an absorbency peak around a wavenumber of 701 cmis at least 0.0100 and no greater than 0.0250. Surface adsorption forces (F: coated regions, F: exposed regions) satisfy '0 nN<F', '50 nN≤F≤70 nN', and “35 nN≤F−F≤65 nN”.