A system is disclosed for cutting shapes from slabs of easily machinable material, such as plastic foam, under computer control. These shaped slabs can then be piled and glued together in order to build large complex volumes, to be used as models, molds or cores of fiber-reinforced objects. The slab...http://www.google.com/patents/US4675825?utm_source=gb-gplus-sharePatent US4675825 - Computer-controlled peripheral shaping system
