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. 15, 2015
Filed:
Dec. 26, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Hirotoshi Tajima, Toride, JP;
Kenichi Hirota, Joso, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image forming unit configured to form a measurement image on a sheet, a measurement unit configured to irradiate the measurement image with light and measure light reflected from the measurement image, a white reference plate arranged to be movable to a first position opposed to the measurement unit and a second position separated farther from the measurement unit than the first position, a shielding unit arranged to be movable to a third position that blocks the light with which the measurement unit irradiates the white reference plate and a fourth position that does not block the light, and a control unit configured to control positions of the reference plate and the shielding unit. When the measurement unit measures the white reference plate, the control unit moves the shielding unit to the fourth position and the white reference plate to the first position.