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. 16, 2010
Filed:
Dec. 12, 2007
Masaru Kobashi, Matsumoto, JP;
Koji Migita, Matsumoto, JP;
Masashi Nakatsu, Shiojiri, JP;
Shinichi Kamoshida, Shiojiri, JP;
Masaru Kobashi, Matsumoto, JP;
Koji Migita, Matsumoto, JP;
Masashi Nakatsu, Shiojiri, JP;
Shinichi Kamoshida, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A charger includes: a first charging member that contacts an image carrier and a second charging member that contacts the image carrier downstream from the first charging member. At the time of image formation, a voltage higher than the discharge start voltage of the first charging member is applied to the first charging member and a voltage lower than the discharge start voltage of the second charging member and lower than the voltage applied to the first charging member is applied to the second charging member, and at the time when an image is not formed, a voltage lower than the discharge start voltage of the first charging member is applied to the first charging member and a voltage higher than the discharge start voltage of the second charging member and higher than the voltage applied to the first charging member is applied to the second charging member.