Patent ID: 7722026

Claim:
A sheet conveyer device to convey a sheet in a conveyer path, comprising: a first roller pair, which is arranged in an intermediate position in the conveyer path and conveys the sheet in the conveyer path; a feeder to feed the sheet in the conveyer path toward the first roller pair during a feeding operation; a discharge portion, on which the sheet carried through the conveyer path is discharged; a second roller pair, which is arranged in the conveyer path in a position closer to the discharge portion than the first roller pair and conveys the sheet in the conveyer path; a control unit to control the first roller pair and the second roller pair to rotate synchronously in one of a first direction, being a direction to convey the sheet toward the discharge portion, and a second direction, being a direction opposite from the first direction; and a judging system to judge as to whether a sheet feeding error has occurred in the feeder, wherein the control unit controls the first roller pair and the second roller pair to rotate synchronously in the second direction during the feeding operation and to rotate synchronously in the first direction when the judging system judges that the sheet feeding error has occurred during the feeding operation.