Patent ID: 8636276
Filing Date: 2014-01-28
Classification: B65H

Abstract:
1. An image reading device comprising: a sheet tray configured to load a plurality of sheets each having a leading edge and a trailing edge; a conveying unit configured to convey the sheet along a conveying path in a conveying direction, the conveying unit comprising: a reading unit provided on the conveying path and configured to read the sheet at a reading position in a main scanning direction orthogonal to the conveying direction; a detecting unit configured to detect the sheet passing through a position upstream of the reading position; and a control unit configured to control the reading unit to start reading the sheet when the detection unit detects that the leading edge reaches a position upstream of the reading position by a first distance, and the control unit configured to control the reading unit to stop reading the sheet when the detection unit detects that the trailing edge reaches a position downstream of the reading position by a second distance, the first distance and the second distance being determined according to the size of the sheet, wherein the sheet has a leading portion including the leading edge and a main scan width in the main scanning direction, and wherein the control unit comprises: