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New concepts of 3D printers continue to emerge. A new homebrewed 3D printer was demonstrated at the Maker Faire 2013 New York. It was a Liquid Metal Jet printer called the Vader printer created by father-and-son makers Scott and Zack Vader at Vader Systems.
via edhagopian’s blurblog http://www.3ders.org/articles/20130926-startup-developing-direct-to-metal-3d-printer-for-makers.html