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:
Nov. 19, 2019
Filed:
Aug. 20, 2018
Fuji Xerox Co., Ltd., Tokyo, JP;
Yasuhiko Kinuta, Kanagawa, JP;
Yuki Tagawa, Kanagawa, JP;
FUJI XEROX CO., LTD., Minato-ku, Tokyo, JP;
Abstract
A charging member includes: a cylindrical or columnar conductive base material; and an elastic portion provided on the conductive base material, in which Re and Rc satisfy Re>Rc, where Re is an outer diameter of a charging member at a position of 5 mm from an axial end portion of an elastic portion, and Rc is the maximum value of an outer diameter of the charging member at an axial center of the elastic portion, and a cylindrical or columnar charging member has a value of Ac/Aa of 1.0 or less, in which Ac is the maximum amplitude value in a periodic region from 1.5 mm to 6 mm in a case of periodically analyzing a surface shape of the charging member in a circumferential direction, and Aa is the maximum amplitude value in a periodic region from 1.5 mm to 6 mm in a case of periodically analyzing a surface shape of the charging member in an axial direction.