An aircraft part manufacturing device for automated composite lay up includes a mandrel tool having a an interior mandrel surface that conforms to an outside mold line (OML) of a part: to be manufactured. One or more circular rings surround the mandrel and are attached to the mandrel. The circular rings...http://www.google.es/patents/US7048024?utm_source=gb-gplus-sharePatente US7048024 - Unidirectional, multi-head fiber placement
