B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 9/10 (2006.01) B65G 47/22 (2006.01) B65G 47/244 (2006.01) B65H 7/08 (2006.01)
Patent
CA 2078405
The skew angle of a sheet (e.g., business form or other document) is detected by providing two sensors spaced from each other a known distance along a straight line perpendicular to the direction of conveyance of the sheet. If there is a skew, the distance travelled by the sheet leading edge between sensings by the sensors is determined, and the skew angle calculated from its tangent. First and second independent drive rollers 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 (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°) to give the sheet a second orientation different from its initial orientation (e.g., from portrait to landscape).
L'angle d'inclinaison d'une feuille (imprimé commercial ou autre document) est détecté par deux capteurs séparés d'une distance connue sur une ligne droite perpendiculaire au sens de déplacement de la feuille. Lorsque la feuille est inclinée, la distance franchie par le bord avant de la feuille entre deux détections sert à calculer l'angle d'inclinaison à partir de sa tangente. Un premier et un second rouleaux d'entraînement indépendants disposés sous la feuille tournent en sens opposés pour compenser l'inclinaison mesurée. De préférence, les rouleaux agissent sous la commande d'un ordinateur non seulement pour redresser la feuille mais aussi pour la faire pivoter selon un angle appréciable (ex. 90 degrés) pour la réorienter par rapport à son orientation initiale (ex. du format à la française au format à l'italienne).
Moore Business Forms Inc.
Smart & Biggar
LandOfFree
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