US 11,724,448 B2
Disguising color in 3D object formation
Wei Huang, Palo Alto, CA (US); Steven J. Simske, Ft. Collins, CO (US); and Gary J. Dispoto, Palo Alto, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 16/612,000
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Jul. 17, 2017, PCT No. PCT/US2017/042335
§ 371(c)(1), (2) Date Nov. 8, 2019,
PCT Pub. No. WO2019/017869, PCT Pub. Date Jan. 24, 2019.
Prior Publication US 2020/0164571 A1, May 28, 2020
Int. Cl. B29C 64/165 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 70/00 (2020.01); B33Y 50/02 (2015.01); B29C 64/393 (2017.01)
CPC B29C 64/165 (2017.08) [B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 70/00 (2014.12); B29C 64/393 (2017.08); B33Y 50/02 (2014.12)] 13 Claims
OG exemplary drawing
 
1. A device comprising:
a material distributor including a spreading element configured to spread a powder build material;
a fluid ejection device including at least one of a thermal inkjet printhead and a piezoelectric inkjet printhead; and
a control portion including a non-transitory medium to store machine readable instructions and a processing resource to execute the instructions to cause:
via at least the spreader element of the material distributor, spreading the powder build material, layer-by-layer, to form a 3D object; and
via the at least one of the thermal inkjet printhead and the piezoelectric inkjet printhead of the fluid ejection device, selectively ejecting onto at least some of the respective layers:
a first fluid agent, comprising a first color, deposited at first selectable voxel locations in a first pattern to affect a first material property of a first portion of the 3D object; and
a second fluid agent, comprising a second color, deposited at second selectable voxel locations in a second pattern to at least partially coextend with, and/or to fill-in open spaces between, at least some of the first selectable voxel locations of the first color to at least partially disguise the first material property and at least one of a shape, a size, and a distribution of the first pattern of the first color on at least one exposed layer of the at least some respective layers of the first portion of the 3D object such that information regarding a purpose, a function, an operation, an identification, a security, a structure, a manufacture, materials, or an effect of the 3D object is disguised.