发明授权
US07431412B2 Media-position sensor system 有权
介质位置传感器系统

Media-position sensor system
摘要:
A printer device comprising a mechanism adapted to generate an image on an image surface, the device comprising a sensor adapted to image a predetermined optical object located substantially on the image surface, the device being adapted to determine at least one dimension of the object's image and thereby determine the distance separating the mechanism and the image surface.
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