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:
Jan. 05, 2016
Filed:
Apr. 15, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Noriaki Adachi, Inzai, JP;
CANON KABUSHIKI KAISHA, , JP;
Abstract
An image forming apparatus which is capable of, even when the density of an image in a color with low reflectivity has decreased, detecting a misregistration of this color with high accuracy. A first image of a first color and a second image of a second value having lower reflectivity than that of the first color are transferred to an image carrier. A first signal corresponds to reflected light from a first measurement image, a second signal corresponds to reflected light from a second measurement image, and a third signal corresponds to reflected light from the image carrier. A threshold value is set based on the second signal and the third signal. A color misregistration between the first and second images is corrected based on information on a positional relationship between the first and second images determined by comparing the first signal and the threshold value.