公开(公告)号：US20200016654A1

公开(公告)日：2020-01-16

申请号：US16577392

申请日：2019-09-20

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard ,  Christina Clowes ,  Matthew Dwyer ,  Douglas White

IPC: B22F3/00 ,  B33Y40/00 ,  F27D11/02 ,  H05B3/66 ,  H05B7/14 ,  H05B3/64 ,  H05B3/14 ,  H05B3/08

Abstract: A furnace heater includes a first conductive lead, a second conductive lead spaced apart from the first conductive lead by a first distance, and a first helical resistive heater element connected to the first conductive lead. The furnace heater also includes a second helical resistive heater element connected to the second conductive lead and to the first helical resistive heater element, the second helical resistive heater element spaced apart from the first helical resistive heater by a second distance, wherein the first distance is at least twice the second distance.