Patent ID: 7796308
Filing Date: 2010-09-14
Classification: H04N

Abstract:
1. An image reading apparatus for reading an image recorded on a document, comprising: a document holding portion onto which said document is held; a document feeding unit for feeding said document held on said document holding portion; a reading window on which said document fed by said document feeding unit is located; an image pickup device for reading an image through said reading window; a document guide configured to guide the document to be fed, which is configured to be movable in a width direction which is perpendicular to a feeding direction of the document to be fed; a moving portion configured to move in linkage with said document guide and oppose said reading window; and a controller configured to detect a position of said moving portion based on an image of the moving portion read through said reading window by said image pickup device and determine a width dimension of the document based on the detected position of said moving portion.