A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto the powder to produce a sintered mass. The computer either determines or is programmed...http://www.google.es/patents/US5316580?utm_source=gb-gplus-sharePatente US5316580 - Method and apparatus for producing parts by selective sintering
Method and apparatus for producing parts by selective sintering