US 11,787,116 B2
Infrared radiation deflector for apparatus for the layer-by-layer formation of three-dimensional objects
Gianluca Dorini, London (GB); Anders Hartmann, London (GB); Marcel Garrido Barrabes, London (GB); and Steffen Kongensbjerg Larsen, London (GB)
Assigned to Stratasys Powder Production Ltd., London (GB)
Appl. No. 17/784,523
Filed by Stratasys Powder Production Ltd., London (GB)
PCT Filed Dec. 11, 2020, PCT No. PCT/GB2020/053179
§ 371(c)(1), (2) Date Jun. 10, 2022,
PCT Pub. No. WO2021/116695, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 1918434 (GB), filed on Dec. 13, 2019; and application No. 1918435 (GB), filed on Dec. 13, 2019.
Prior Publication US 2023/0028987 A1, Jan. 26, 2023
Int. Cl. B29C 64/286 (2017.01); B33Y 30/00 (2015.01); B29C 64/282 (2017.01); B29C 64/153 (2017.01); B29C 64/245 (2017.01); B29C 64/236 (2017.01)
CPC B29C 64/286 (2017.08) [B29C 64/153 (2017.08); B29C 64/236 (2017.08); B29C 64/245 (2017.08); B29C 64/282 (2017.08); B33Y 30/00 (2014.12)] 20 Claims
OG exemplary drawing
 
1. An infrared lamp carriage for an apparatus for the formation of three-dimensional objects by consolidation of particulate material, the infrared lamp carriage comprising an infrared radiation deflector and an elongate infrared lamp mounted to the infrared lamp carriage, wherein the lamp extends, in a length direction, along a lamp axis, and wherein the radiation deflector comprises:
opposing first and second elongate side walls, wherein the first and second elongate side walls comprise a first elongate mirror and a second elongate mirror extending parallel to the lamp axis and along at least a lower internal portion of the respective first and second side walls; and
an upper opening and a lower opening between the first and second side walls and arranged to pass lamp radiation to an exterior of the radiation deflector; wherein the lamp axis extends along and between the first mirror and the second mirror, the first mirror and second mirror each having a concave surface with respect to the lamp axis;
wherein the first mirror is an upward deflecting mirror concave with respect to the upper opening and positioned so as to redirect at least a portion of direct lamp radiation through the upper opening.