US 11,691,423 B2
Uniform print head surface coating
Chien-Hua Chen, Corvallis, OR (US); Michael G. Groh, Corvallis, OR (US); and Bo Song, Corvallis, OR (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/417,875
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Jul. 30, 2019, PCT No. PCT/US2019/044178
§ 371(c)(1), (2) Date Jun. 24, 2021,
PCT Pub. No. WO2021/021136, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0143978 A1, May 12, 2022
Int. Cl. B41J 2/16 (2006.01); B41J 2/14 (2006.01)
CPC B41J 2/1606 (2013.01) [B41J 2/1433 (2013.01); B41J 2002/14475 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method comprising:
pressing a layer of material onto a surface of a print head, the surface defining fluid nozzle openings; and
causing adherence of portions of the layer of material onto the surface and overlapping edges of the surface at the openings and with a uniform thickness on the surface by removing the layer over the openings and adhering about half the thickness of the layer to the surface around the openings.