US Patent 10029937 Printer head for 3D printing

A printer head for 3D printing of glass and a method of 3D printing of glass is disclosed. In one embodiment, the printer head comprises a heating body made of a refractory metal, a through hole arranged in a central part of the heating body for feeding glass through the heating body, a nozzle arranged on the heating body at an outlet of the through hole, and an induction coil arranged around the heating body and to heat the heating body by way of electromagnetic induction if a HF voltage is applied across the induction coil.