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:
Jun. 11, 2013
Filed:
Nov. 12, 2009
Takaaki Kaya, Suntou-gun, JP;
Ayako Sekikawa, Susono, JP;
Ryoichi Fujita, Chofu, JP;
Shigeto Tamura, Suntou-gun, JP;
Makoto Kambayashi, Suntou-gun, JP;
Takaaki Kaya, Suntou-gun, JP;
Ayako Sekikawa, Susono, JP;
Ryoichi Fujita, Chofu, JP;
Shigeto Tamura, Suntou-gun, JP;
Makoto Kambayashi, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a cyan toner which, while being a capsule-type toner having excellent low-temperature fixability, has excellent offset resistance and charging performance and can obtain high-quality images. A cyan toner having at least a resin (a) having a polyester as a main component, a colorant, and a wax, in which glass transition temperatures (° C.) Tg(0.5) and Tg(4.0) obtained at a rate of temperature increase of 0.5° C./min or 4.0° C./min satisfy 40.0≦Tg(0.5)≦60.0 and 2.0≦Tg(4.0)−Tg(0.5)≦10.0, and wherein, when the concentration of the cyan toner in an ethyl acetate dispersion is Cc(mg/ml), and the light absorbance at a wavelength of 712 nm of the dispersion is A(ethyl acetate)712, A(ethyl acetate)712/Cc<0.15 is satisfied, and wherein, when the concentration of the cyan toner in a chloroform solution is Cc(mg/ml), and the light absorbance at a wavelength of 712 nm of the solution is A(chloroform)712, 2.00<A(chloroform)712/Cc<8.15 is satisfied.