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. 01, 2011
Filed:
Nov. 10, 2008
Yoritaka Tsubaki, Nara, JP;
Yasuo Imura, Tenri, JP;
Yoritaka Tsubaki, Nara, JP;
Yasuo Imura, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A toner is composed of toner particles which contain at least a binder resin, a colorant, and a release agent. As to particle size distribution and particle number distribution of the toner particles, a volume average particle size of the toner particles is set to be 3.0 μm to 6.0 μm, and a content of 5.0 μm or smaller toner particles is set to be 40% by number while a content of 8.0 μm or larger toner particles is set to be less than 2% by volume. Furthermore, an amount of the release agent in toner particle surface is set to be 0.7% by weight or more and 1.8% by weight or less. And furthermore, the release agent is a petroleum-based release agent.