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. 20, 2014
Filed:
Apr. 21, 2011
Masayuki Ohsawa, Atsugi, JP;
Toshio Kojima, Isehara, JP;
Kyohta Koetsuka, Fujisawa, JP;
Yoshiyuki Takano, Hachioji, JP;
Noriyuki Kamiya, Yamato, JP;
Takashi Innami, Atsugi, JP;
Takumi Terasaka, Atsugi, JP;
Masayuki Ohsawa, Atsugi, JP;
Toshio Kojima, Isehara, JP;
Kyohta Koetsuka, Fujisawa, JP;
Yoshiyuki Takano, Hachioji, JP;
Noriyuki Kamiya, Yamato, JP;
Takashi Innami, Atsugi, JP;
Takumi Terasaka, Atsugi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A develop roller includes a magnet roller, and a develop sleeve containing the magnet roller and comprising a plurality of depressions in an elliptic shape regularly arranged with an interval in a longitudinal direction on a surface onto which developer is attracted by a magnetic force of the magnet roller, wherein the depressions are arranged such that a longitudinal direction of the depressions is intersected with the longitudinal direction of the develop sleeve, and a downstream side of the depressions are formed to be deeper than an upstream side in a rotary direction of the develop sleeve.