3D Systems Inc., a Valencia company that...

3D Systems Inc., a Valencia company that makes a machine to produce models of parts and products, said it appointed Edwin J. Kaftal to the position of executive vice president. Kaftal will continue to be 3D’s chief financial officer. Ralph A. Schubert was appointed vice president of new business opportunities. Dennis K. Medler will return to the position of vice president of sales and marketing after working for about 18 months at DTM Corp. of Austin, Tex. Jerry Janson, who directed sales in the Midwest for 3D, will become national sales manager.