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:
Mar. 27, 2012
Filed:
Dec. 05, 2006
Yojiro Hotta, Mishima, JP;
Kazuo Terauchi, Numazu, JP;
Kunihiko Nakamura, Gotemba, JP;
Hiroyuki Fujikawa, Yokohama, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Hirohide Tanikawa, Suntou-gun, JP;
Yojiro Hotta, Mishima, JP;
Kazuo Terauchi, Numazu, JP;
Kunihiko Nakamura, Gotemba, JP;
Hiroyuki Fujikawa, Yokohama, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Hirohide Tanikawa, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a developer for replenishment capable of forming a high-quality image even upon duration. The developer for replenishment includes at least a toner and a magnetic carrier, and in the developer for replenishment, 1 part by mass of the magnetic carrier is blended with 2 to 50 parts by mass of the toner, and the magnetic carrier contains a ferrite core and a resin component, has a true specific gravity of 2.5 to 4.2 g/cm, has a 50% particle diameter on a volume basis (D50) of 15 to 70 μm, and has an average circularity of 0.850 to 0.950, the average circularity having a coefficient of variation of 1.0 to 10.0%.