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. 12, 2019
Filed:
Jan. 17, 2018
Kyocera Document Solutions Inc., Osaka, JP;
Masaki Okita, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
Toner particles contain a non-crystalline polyester resin, a crystalline polyester resin, a styrene-acrylic acid-based resin, and a releasing agent. An amount of the releasing agent contained in the toner is at least 7.5% by mass and no greater than 12.5% by mass. An amount of the styrene-acrylic acid-based resin contained in the toner is at least 50 parts by mass and no greater than 100 parts by mass relative to 100 parts by mass of the releasing agent. The crystalline polyester resin includes an acrylic acid-based unit and a styrene-based unit. The styrene-acrylic acid-based resin includes an acrylic acid-based unit that has an epoxy group and a styrene-based unit. A peak top molecular weight of the toner in a differential molecular weight distribution curve is at least 8,000 and no greater than 12,000. A mass average molecular weight of the toner is at least 40,000 and no greater than 65,000.