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:
Jul. 03, 2012
Filed:
May. 26, 2010
Sueaki Okamoto, Osaka, JP;
Sueaki Okamoto, Osaka, JP;
Kyocera Mita Corporation, , JP;
Abstract
An image forming apparatus has an image bearing member on which a toner image is to be formed. A transfer roller contacts a surface of the image bearing member for transferring a toner image on the image bearing member to one side of a transfer medium by applying a voltage having a polarity opposite to that of the toner image on the image bearing member from the other side of the transfer medium. A biasing member biases the transfer roller toward the image bearing member. The transfer roller is shaped such that the outer diameter of a first part corresponding to the width of a specified sheet size is constant and the outer diameters of second parts located closer to opposite ends of the transfer roller than the first part are gradually increased toward the outer sides in an axial direction.