Patent ID: 11858215
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 9:
10. A 3D printer comprising:
a housing;
a feed mechanism to distribute a build material on a platform that is to be disposed at a location established with respect to the housing;
a reflector spaced apart from the location for the platform;
a heater filament disposed between the reflector and the location for the platform and extending along a longitudinal filament axis, wherein the reflector comprises a reflective surface positioned to direct radiant energy from the heater filament toward the platform to heat the build material on the platform; and
a plurality of lateral baffles between the heater filament and the reflector, wherein individual lateral baffles of the plurality of lateral baffles comprise a radiant energy absorbing plate that extends laterally through the reflective surface and is positioned to absorb at least a portion of a reflection of the radiant energy reflected from the build material to prevent the portion of the reflection of the radiant energy from being re-reflected by the reflecting surface back to the platform; and
wherein the reflector and the plurality of lateral baffled extend around a portion of the heater filament in a circumferential direction.