Patent ID: 7954814

Claim:
A feeding device, comprising: a feed roller group including at least two feed rollers rotatable around an axis perpendicular to a sheet feeding direction; a first roller group including at least two first rollers rotatable along with the feed rollers, and operative to convey the sheet with the feed roller to a first direction; and a second roller group including at least two second rollers rotatable along with the feed rollers, and operative to convey the sheet with the feed rollers to a second direction opposite to the first direction, wherein: at least one of the first rollers includes a first asymmetric roller having a first contact region that is in contact with the feed roller and first noncontact regions that are not in contact with the feed roller, the first noncontact regions being arranged at both ends of the first roller in a first axial direction of a rotating shaft of the feed rollers and one of the first noncontact regions at one end of the first roller has a diameter larger than a diameter of the first contact region, at least one of the second rollers includes a second asymmetric roller having a second contact region that is in contact with the feed roller and second noncontact regions that are not in contact with the feed roller, the second noncontact regions being arranged at both ends of the second roller in a second axial direction opposite to the first axial direction and one of the second noncontact regions at one end of the second roller has a diameter larger than a diameter of the second contact region, and the first rollers and the second rollers are longer than the feed rollers in an axial direction of the rotating shaft.