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. 06, 2008
Filed:
Jun. 29, 2005
Yusuke Hasegawa, Shizuoka-ken, JP;
Yoshihiro Ogawa, Numazu, JP;
Shinichiro Abe, Toride, JP;
Junko Nishiyama, Mishima, JP;
Takashige Kasuya, Shizuoka-ken, JP;
Yusuke Hasegawa, Shizuoka-ken, JP;
Yoshihiro Ogawa, Numazu, JP;
Shinichiro Abe, Toride, JP;
Junko Nishiyama, Mishima, JP;
Takashige Kasuya, Shizuoka-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide a magnetic toner which is excellent in durability and developability even in the case of being applied to high-speed developing process or being used in a large-capacity process cartridge amount of toner in which is increased, and which has high degree of blackness. Provided is a magnetic toner having magnetic toner particles containing at least a binder resin and magnetic material particles each comprising a predetermined amount of a titanium compound, characterized in that: 1) the magnetic material particles have a predetermined amount of adsorbed moisture at a relative vapor pressure of 50%; and 2) a difference between the amount of moisture adsorbed to the magnetic material particles in an adsorbing process for increasing a relative vapor pressure and the amount of moisture adsorbed to the magnetic material particles in a desorbing process for reducing a relative vapor pressure is reduced.