Patent ID: 7537211

Claim:
A media transportation mechanism comprising: a transportation path for transporting a medium; first and second transportation roller pairs respectively disposed on the transportation path on an upstream side and a downstream side of a device for acquiring information from or recording information to the medium, each transportation roller having a rotational axis; and a sliding guide surface disposed between the first transportation roller pair and second transportation roller pair for guiding the medium through the transportation path with the sliding guide surface in contact with one edge of the medium; wherein the first transportation roller pair is structured to push one leading end edge of the medium against the sliding guide surface; the second transportation roller pair is structured to push a trailing end portion of said edge of the medium against the sliding guide surface; the first and second transportation roller pairs are disposed with the rotational axes thereof biased relative to the transportation path; the rotational axis of the first transportation roller pair being inclined with an end farthest from the sliding guide surface disposed forward of an end closest to the sliding guide surface in a forward transportation direction; and the rotational axis of the second transportation roller pair being inclined with an end closest to the sliding guide surface disposed forward of an end farthest from the sliding guide surface angled in the forward transportation direction.