A positioning device includes a movable table supported by a rectilinear guide mechanism or rotary mechanism, the movable table being moved by a driving mechanism so as to position a member, to be conveyed, placed on the movable table, with respect to a predetermined site. After the member being conveyed...http://www.google.com.hk/patents/US4999506?utm_source=gb-gplus-share專利 US4999506 - Positioning mechanism
