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. 02, 2003
Filed:
Oct. 07, 2002
Yuji Bessho, Chiba, JP;
Hiroki Takayanagi, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member, an image forming portion for forming an image on the image bearing member, a contact transferring member for transferring the image formed on the image bearing member onto a transferring medium, a transferring current applying portion for applying a current to the contact transferring member, and a controller for controlling an amount of the current applied by the transferring current applying portion. Images formed on the image bearing member are transferred in a superposed manner onto the transferring medium, which is being conveyed. The controller determines an amount of current to be applied to the contact transferring member based on: the image ratio in the direction perpendicular to the direction in which the transferring medium is conveyed, of an image that has already been transferred on the transferring medium; the image ratio in the direction perpendicular to the direction in which the transferring medium is conveyed, of an image on the image bearing member; and the image ratio in the direction perpendicular to the direction in which the transferring medium is conveyed, of a portion in which the images overlap.