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:
Oct. 16, 2012
Filed:
Nov. 05, 2010
Hiroyuki Fujikawa, Yokohama, JP;
Kunihiko Nakamura, Gotemba, JP;
Nozomu Komatsu, Susono, JP;
Yoshiaki Shiotari, Mishima, JP;
Takeshi Ohtsu, Toride, JP;
Takayuki Itakura, Mishima, JP;
Hiroyuki Fujikawa, Yokohama, JP;
Kunihiko Nakamura, Gotemba, JP;
Nozomu Komatsu, Susono, JP;
Yoshiaki Shiotari, Mishima, JP;
Takeshi Ohtsu, Toride, JP;
Takayuki Itakura, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a toner including: toner particles each containing at least a binder resin and a wax; and an external additive, in which surfaces of the toner particles have an average surface roughness (Ra) measured with a scanning probe microscope of 1.0 nm or more and 30.0 nm or less; and the toner has a surface tension index I for a 45-vol % aqueous solution of methanol measured by a capillary suction time method and calculated from the following equation (1) of 5.0×10N/m or more and 1.0×10N/m or less:/()  Eq. (1)where I represents the surface tension index (N/m) of the toner, Prepresents a capillary pressure (N/m) of the toner for the 45-vol % aqueous solution of methanol, A represents a specific surface area (m/g) of the toner, and B represents a true density (g/cm) of the toner.