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:
Mar. 23, 2010
Filed:
Oct. 03, 2007
Toshiaki Ino, Kyoto, JP;
Syouichi Fujita, Kashiba, JP;
Yasuhiro Nishimura, Takaishi, JP;
Susumu Murakami, Kizugawa, JP;
Toshiaki Ino, Kyoto, JP;
Syouichi Fujita, Kashiba, JP;
Yasuhiro Nishimura, Takaishi, JP;
Susumu Murakami, Kizugawa, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A charging apparatus having a corona electrode is provided which exhibits high durability against ozone and moisture in the air, which can charge a surface of a photoreceptor drum stably throughout the life of an image forming apparatus, and which can be manufactured at a low cost. In a charging apparatus including corona electrode having a flat plate section and a pointed projection section, a support member, a shield case, and a grid electrode, a coating layer including a material different from the material of the corona electrode is formed at least on part of the surface of pointed projections constituting the pointed projection section.