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:
Aug. 04, 2015
Filed:
Jan. 06, 2012
Shohei Okumura, Tokyo, JP;
Shohei Okumura, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A typical configuration of a development device for an image forming apparatus includes a development sleeve and an electrode portion. In the development device, a pre-bias is applied between the electrode portion and the photosensitive drum, a DC voltage is applied to the development sleeve, a development bias is applied between the development sleeve and the photosensitive drum, the toner in the developer on the development sleeve is moved to the photosensitive drum, and an electrostatic latent image is developed on the photosensitive drum. In the development device, the electric field intensity between the electrode portion and the development sleeve by the pre-bias is larger than the electric field intensity between the image bearing member and the development sleeve by the development bias.