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:
May. 26, 2009
Filed:
Nov. 29, 2007
Daisuke Yoshiba, Suntou-gun, JP;
Katsuhisa Yamazaki, Numazu, JP;
Syuhei Moribe, Numazu, JP;
Junko Nishiyama, Suntou-gun, JP;
Shuichi Hiroko, Susono, JP;
Masami Fujimoto, Suntou-gun, JP;
Takashige Kasuya, Suntou-gun, JP;
Daisuke Yoshiba, Suntou-gun, JP;
Katsuhisa Yamazaki, Numazu, JP;
Syuhei Moribe, Numazu, JP;
Junko Nishiyama, Suntou-gun, JP;
Shuichi Hiroko, Susono, JP;
Masami Fujimoto, Suntou-gun, JP;
Takashige Kasuya, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner is provided which can stably provide a favorable density stability, line reproducibility and dot reproducibility even in high-speed copying machines, printers and the like which form high resolution latent images over a long period regardless of environmental conditions, and can provide the image quality adaptable to embedded pattern printing, QR code printing and the like. The present invention is characterized in that the toner which includes toner particles including at least a binder resin and a colorant, and a fine silica powder, has a volume median diameter (D) of not less than 0.70 μm and not more than 3.00 μm, and a total pore volume of not more than 0.200 cm/g, measured in the range of the pore diameter from not less than 1.7 nm and not more than 300.0 nm.