| 摘要 |
A method and apparatus for selectively applying, a material to a target moving along a path is disclosed. The apparatus includes at least one detector for identifying an upstream position of the target; a dispenser spaced downstream from the detector by an offset distance, the dispenser configured for selectively releasing material to contact the target; a velocity sensor for creating a velocity signal proportional to a velocity of the target; and a controller for selectively varying the offset distance in response to the velocity signal.
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