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:
Jan. 03, 2012
Filed:
Nov. 17, 2006
Noboru Sakurai, Chino, JP;
Yoichi Yamada, Shiojiri, JP;
Junichi Nakahara, Fujimi-machi, JP;
Masanao Kunugi, Fujimi-machi, JP;
Tomohiro Aruga, Shiojiri, JP;
Katsumi Okamoto, Azamimo, JP;
Noboru Sakurai, Chino, JP;
Yoichi Yamada, Shiojiri, JP;
Junichi Nakahara, Fujimi-machi, JP;
Masanao Kunugi, Fujimi-machi, JP;
Tomohiro Aruga, Shiojiri, JP;
Katsumi Okamoto, Azamimo, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A method for manufacturing a developing agent carrier of a hollow or solid cylindrical shape having an outer peripheral surface and an irregularity section formed on the outer peripheral surface to carry a developing agent is provided. The method comprises a step of preparing a base material of a hollow or solid cylindrical shape which is to become the developing agent carrier, the base material having an outer peripheral surface; and a step of forming the irregularity section by pressing dice for formation of the irregularity section against the outer peripheral surface of the base material. The irregularity section forming step comprises a first step of forming a plurality of first depression portions on the outer peripheral surface of the base material by use of a die and a second step of forming a plurality of second depression portions on the outer peripheral surface of the base material by use of a die identical with or different from the die used in forming the first depression portions, in such a manner that the second depression portions are dislocated from the first depression portions.