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:
Dec. 29, 2009
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 charging brush which is rotatably provided and is brought into contact with an image carrier to charge the surface of the image carrier; a charging roller which is brought into contact with the image carrier at a portion on the downstream side relative to the charging brush in the rotational direction of the image carrier to charge the surface of the image carrier; and a controller which controls voltages applied to the charging brush and charging roller, wherein the controller controls voltages applied to the charging brush and charging roller such that one-fifth of the absolute value of a charging brush current flowing between the image carrier and charging brush is lower than the absolute value of a charging roller current flowing between the image carrier and charging roller.