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:
Oct. 22, 2013
Filed:
Dec. 16, 2010
Rikuo Kawakami, Numazu, JP;
Rikuo Kawakami, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member, a charger for electrically charging the member, an electrostatic latent image forming device for forming an electrostatic latent image on the member, a developer for developing the electrostatic latent image into a toner image, a transferer for transferring the toner image from the member onto a recording material and including a transfer member to which a transfer voltage is to be applied, a transfer-voltage source variably setting the transfer voltage, and a circuit for detecting a current passing between the image bearing and the transfer members by the transfer voltage applied from the voltage source, and a controller for controlling the voltage source. The controller sets the transfer-voltage value, applied from the voltage source during a non-passing period of the recording material, so that a predetermined current is detected by the circuit.