Patent ID: 7954813

Claim:
A sheet conveying device comprising: a first conveying roller pair configured to convey a sheet by nipping the sheet; a second conveying roller pair disposed upstream of said first conveying roller pair and configured to cooperate with said first conveying roller pair to convey the sheet by nipping the sheet; a first driving unit configured to drive said first conveying roller pair; a second driving unit configured to drive said second conveying roller pair; and a control unit configured to control said first driving unit and said second driving unit such that a target speed of a circumferential speed of said first conveying roller pair becomes lower than a target speed of a circumferential speed of said second conveying roller pair, wherein said control unit controls said first driving unit and said second driving unit such that, the smaller the rigidity of the sheet, the greater the speed difference between the target speed of the circumferential speed of said first conveying roller pair and the target speed of the circumferential speed of said second conveying roller pair.