Patent ID: 7287922

Claim:
An imaging apparatus for forming an image on a sheet of media, comprising: a drive roller positioned to convey said sheet of media in a sheet feed direction, said drive roller having a first rotational axis; and a backup roller positioned adjacent said drive roller to engage said sheet of media, said backup roller and said drive roller forming a nip, said backup roller being formed by a member including a disk portion defining a plane, and having a second rotational axis extending through said disk portion and a circumferential region around which a plurality of teeth are arranged, wherein each tooth of said plurality of teeth has a tip end extending in a direction away from said second rotational axis and extending outwardly from said disk portion to a region outside said plane, and wherein when said backup roller is rotated said tip end of each of said plurality of teeth sequentially extends toward said first rotational axis of said drive roller at an angle non-orthogonal to said first rotational axis.