Patent ID: 8614839

Claim:
An image reader, comprising: a reading member fixedly mounted in the image reader to read an image on a sheet conveyed into the image reader; a guide disposed opposite the reading member to support the sheet with respect to the reading member; a guide moving member, provided at one end of the guide, to move the guide with respect to the reading member in a main scanning direction in which the reading member reads the image on the sheet; a pressing member, provided at the other end of the guide, to apply pressure to the guide in the main scanning direction; a guide rotating member to rotate the guide in a sub-scanning direction perpendicular to the main scanning direction; and a controller to control the reading member to scan different positions on the guide moved by the guide moving member and rotated by the guide rotating member to generate shading data, wherein the guide moving member includes a movable member and a fixed member, the movable member of the guide moving member includes a chamfer and is provided at one end of the guide in an axial direction thereof, and the fixed member of the guide moving member includes a chamfer corresponding to the chamfer of the movable member and is fixedly mounted in the image reader.