A method and apparatus for automated loading and unloading of a cylinder in an engraver. The method and apparatus permit the engraver to accommodate cylinders of differing geometries, including a range of lengths, diameters and mounting configurations. The engraver includes a headstock and a ...http://www.google.com.tw/patents/US5751435?utm_source=gb-gplus-share專利 US5751435 - Method and apparatus for aligning a cylinder in an engraver
