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:
Oct. 22, 2013
Filed:
May. 17, 2012
Takumi Terasaka, Yokohama, JP;
Toshio Kojima, Isehara, JP;
Kyohta Koetsuka, Fujisawa, JP;
Noriyuki Kamiya, Yamato, JP;
Masayuki Ohsawa, Atsugi, JP;
Hiroya Abe, Yokohama, JP;
Takumi Terasaka, Yokohama, JP;
Toshio Kojima, Isehara, JP;
Kyohta Koetsuka, Fujisawa, JP;
Noriyuki Kamiya, Yamato, JP;
Masayuki Ohsawa, Atsugi, JP;
Hiroya Abe, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A development roller includes a magnet roller and a rotatably supported development sleeve including inside thereof the magnet roller, the development sleeve is formed in a cylindrical shape and configured such that a shaft center of the cylindrical shape is inconsistent with a rotation axis of the development sleeve, the development sleeve includes an outer surface provided with many circular or elliptical depressions in a planar view, the depressions being regularly arranged at intervals, and a depth of the depression provided in a portion of the outer surface close to the rotation axis is larger than a depth of the depression provided in a portion of the outer surface far from the rotation axis.