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:
Nov. 26, 2013
Filed:
Feb. 09, 2011
Masatake Usui, Susono, JP;
Hiroshi Kita, Mishima, JP;
Shun-ichi Ebihara, Suntou-gun, JP;
Ken Yokoyama, Suntou-gun, JP;
Masatake Usui, Susono, JP;
Hiroshi Kita, Mishima, JP;
Shun-ichi Ebihara, Suntou-gun, JP;
Ken Yokoyama, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus uses the difference in time taken for each patch to reach a color sensor, which occurs upon reversing the conveyance direction of a printing material. Due to this difference in time, the temperature of the printing material in detection by the color sensor differs among the respective patches. The error of a colorimetric value due to thermochromism is reduced by placing a patch with a colorimetric value which has a low temperature dependence so as to be detected earlier, and a patch with a colorimetric value which has a high temperature dependence so as to be detected later.