Sensor undulation of front edge of paper. The invention relates to a system and a method for measuring waviness of leaf and a system for straightening sheet automatic controlled by means of the same out of sheets of paper overSSAS of printer.The undulation of sheet can be sensoriada remotely without contact or interfere with the movement of the leaves in its path of normal leaf, using a sensor optical wave single leaf.However I need, which operates on a portion of the sheet moves at an angle with respect to the same and perpendicularly to the same, with optical elements insensitive to displacement.Both in a direction substantially parallel to the direction of angular movement of the sheet, and in a direction substantially transverse to the direction of angular movement of the sheet.The relationship of the two output signals.
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