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:
Jan. 22, 2008
Filed:
Jul. 14, 2004
Takayuki Itakura, Shizuoka, JP;
Yuko Sato, Shizuoka, JP;
Hiroyuki Fujikawa, Kanagawa, JP;
Nobuyoshi Sugahara, Shizuoka, JP;
Hirohide Tanikawa, Shizuoka, JP;
Takayuki Itakura, Shizuoka, JP;
Yuko Sato, Shizuoka, JP;
Hiroyuki Fujikawa, Kanagawa, JP;
Nobuyoshi Sugahara, Shizuoka, JP;
Hirohide Tanikawa, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A magenta toner is provided which contains at least a binder resin, a colorant, and a wax, in which a maximum heat-absorption peak temperature as measured using a differential scanning calorimeter, a reflectance at a predetermined wavelength when measured in a powder state by spectroscopic analysis, and lightness when measured in a powder form are in specific ranges. A full-color image is formed using the magenta toner as a pale magenta toner in combination with a deep magenta toner. According to the present invention, it becomes possible to form a vivid image which has reduced graininess and roughness from a low-density region to a high-density region, ensures a sufficient fixing temperature region, has a color reproduction range wider that the conventional one, and has high transparency on an OHP sheet.