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. 01, 2009
Filed:
Apr. 03, 2006
Minoru Matsuguma, Suntoh-gun, JP;
Kenji Matsuda, Numazu, JP;
Masaki Ojima, Mishima, JP;
Katsuhiro Kojima, Mishima, JP;
Hideki Matsumoto, Mishima, JP;
Minoru Matsuguma, Suntoh-gun, JP;
Kenji Matsuda, Numazu, JP;
Masaki Ojima, Mishima, JP;
Katsuhiro Kojima, Mishima, JP;
Hideki Matsumoto, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member; a charging member for contacting a peripheral surface of the image bearing member to electrically charge the peripheral surface; a first developing device for forming a first developed image on the peripheral surface of the image bearing member charged by the charging member; a second developing device for forming a second developed image on the peripheral surface, wherein a combined developed image is formed by superimposing the first developed image and the second developed image on a common transfer material, wherein when the combined image is being formed, the charging member is cleaned by transferring, by an electric field, material deposited on the charging member to a region between the first developed image and the second developed image on the peripheral surface of the image bearing member, and wherein the first developed image and the second developed image are not formed in the region.