Hangprinter in Action (IMAGE) Umea University Caption Torbjørn Ludvigsen, the inventor of the HangPrinter, is surveying his 3-D printer in action. Credit Linnéa Therese Dimitrou Usage Restrictions This photo may be used freely. Please give credit to the photographer. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.