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:
Sep. 14, 2004
Filed:
Mar. 21, 2002
Fumihiro Sasaki, Fuji, JP;
Hiroaki Matsuda, Numazu, JP;
Bing Shu, Mishima, JP;
Maiko Kondo, Numazu, JP;
Hiroshi Nakai, Yokohama, JP;
Hiroto Higuchi, Numazu, JP;
Yasuaki Iwamoto, Numazu, JP;
Yoshihiro Suguro, Numazu, JP;
Hiroyuki Yoshikawa, Numazu, JP;
Masahide Yamashita, Numazu, JP;
Kazuyuki Yazaki, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A two component developer comprising a magnetic toner containing a binder resin and a magnetic particle, and a magnetic carrier containing a magnetic particle, wherein the magnetic toner has an average particle diameter of 4.0 to 10.0 &mgr;m, and contains 5 to 80 No. % of toner particles having particle diameter of 5 &mgr;m or less, and exhibits magnetization of 10 to 25 emu/g under magnetic field of 5 kiloersteds.