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. 10, 2011
Filed:
Jan. 21, 2010
Chika Inoue, Berlin, DE;
Hiroyuki Fujikawa, Yokohama, JP;
Koh Ishigami, Mishima, JP;
Kunihiko Nakamura, Gotemba, JP;
Nozomu Komatsu, Mishima, JP;
Tomoko Endo, Odawara, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Chika Inoue, Berlin, DE;
Hiroyuki Fujikawa, Yokohama, JP;
Koh Ishigami, Mishima, JP;
Kunihiko Nakamura, Gotemba, JP;
Nozomu Komatsu, Mishima, JP;
Tomoko Endo, Odawara, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetic carrier and a two-component developer are provided which have remedied blank areas, fog after leaving, carrier sticking during running, and image density variations before and after running. The magnetic carrier has magnetic carrier particles having at least porous magnetic core particles and a resin. The magnetic carrier particles satisfying the specific conditions (a), (b) and (c) where, in a reflected electron image of cross sections of the magnetic carrier particles as photographed with a scanning electron microscope, straight lines that divide a cross section of a magnetic carrier particle into 72 at intervals of 5° are drawn from a reference point of the cross section thereof toward the surface of the magnetic carrier particle; the magnetic carrier particles being contained in an amount of 60% by number or more.