Patent ID: 8861043
Filing Date: 2014-10-14
Classification: H04N

Abstract:
1. An image reading apparatus, comprising: a first reading unit disposed below a first glass to read at least one side of a document transported along a document transporting path; a second reading unit disposed above a second glass to read at least one side of a document transported along the document transporting path, the second reading unit being disposed at a predetermined distance from the first reading unit along a document feeding direction such that the first and second reading units have different reading positions in the document feeding direction, and the first glass and the second glass are sequentially arranged along the document feeding direction; a duplex path to guide the document, which is read by the first reading unit and the second reading unit, to be transported to the first reading unit and the second reading unit again in a state in which the first side and the second side of the document are reversed; and a control unit to determine whether the first reading unit and the second reading unit are operating normally by comparing image information of the first and second sides of the document read by the first reading unit with image information of the first and second sides of the document read by the second reading unit.