| 摘要 |
The skew angle of a sheet (39) (e.g., business form or other document) is detected by providing two sensors (40, 40') spaced from each other a known distance along a straight line perpendicular to the direction (A) of conveyance of the sheet. If there is a skew, the distance travelled by the sheet leading edge (44) between sensings by the sensors is determined, and the skew angle calculated from its tangent. First and second independent drive rollers (35, 36) under the sheet are driven in opposite directions of rotation to compensate for the skew angle. The rollers preferably act in conjunction with a controller (42) (computer) to not only reorient the sheet to compensate for the skew, but also to rotate the document through a significant angle (e.g., 90<o>) to give the sheet a second orientation different from its initial orientation (e.g., from portrait to landscape). <IMAGE>
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