Patent ID: 8544843

Claim:
A paper transport device that corrects angled travel in paper, comprising: a first registration roller and a second registration roller that is disposed on an upstream side and a downstream side in a transport direction of the paper, with a distance between the first registration roller and the second registration roller in the transport path of the paper; an angled travel detection unit that is disposed upstream from the first registration roller in the transport direction of the paper and that detects angled travel in the paper; and a control unit, wherein the first and second registration rollers correct angled travel in the paper by stopping the paper when the leading edge of the paper butts against the first and second registration rollers and then transporting the paper; when angled travel is not detected in the paper by the angled travel detection unit, the control unit controls the first and second registration rollers so that: the first registration roller keeps rotating so that the paper is transported and not stopped even when the leading edge of the paper butts against the first registration roller; and the second registration roller temporarily stops and thereafter rotates so that the paper stops when the leading edge of the paper butts against the second registration roller and is then transported, and when angled travel has been detected in the paper by the angle travel detection unit, the control unit controls the first and second registration rollers so that the first and second registration rollers temporarily stop and then rotate so that the paper stops when the leading edge of the paper butts against the first and second registration rollers and is then transported.