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:
Jan. 28, 2010
Akihisa Iio, Yokohama, JP;
Yohei Nakamura, Kawasaki, JP;
Akihisa Iio, Yokohama, JP;
Yohei Nakamura, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A printer includes an optical sensor configured to image a surface of a medium, and a contact member configured to provide a unique concavo-convex shape by contacting the surface of the conveyed medium on an upstream side thereof. A calculation unit calculates the movement amount of the medium by pattern matching calculation using a correlation window between a plurality of image data acquired at different timings by an optical sensor with the conveyance of the medium. The calculation unit searches in image data first acquired for a unique pattern reflecting the unique concavo-convex shape, and set a region including the unique pattern as a correlation window.