Patent ID: 7111918

Claim:
A media-positioning sensor assembly comprising: a mechanism to move back and forth over media along a first axis, the media advancing past the mechanism along a second axis perpendicular to the first axis; and, a media-positioning sensor situated on the mechanism to detect positioning of the media relative to the mechanism along at least one the first axis and the second axis, wherein one or more of the following is true: first, the mechanism moves back and forth over the media along the first axis between a first end position and a second end position, the media-positioning sensor having a first sub-sensor remaining over the media when the mechanism is at the first end position and a second sub-sensor remaining over the media when the mechanism is at the second end position; and, second, upon a beginning of the media passing under the mechanism relative to the second axis, the mechanism moves substantially to a center of the media with respect to the first axis, such that the media-positioning sensor is able to detect the beginning of the media relative to the second axis at the center of the media with respect to the first axis.