US 12,330,158 B2
Fluid ejection die with antechamber sidewalls that curve inward
Kathryn H. Cyr, Corvallis, OR (US); and Debora J. Thomas, Corvallis, OR (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/782,840
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Mar. 30, 2020, PCT No. PCT/US2020/025728
§ 371(c)(1), (2) Date Jun. 6, 2022,
PCT Pub. No. WO2021/201824, PCT Pub. Date Oct. 7, 2021.
Prior Publication US 2023/0015600 A1, Jan. 19, 2023
Int. Cl. B01L 3/00 (2006.01); B41J 2/135 (2006.01)
CPC B01L 3/502761 (2013.01) [B01L 2200/0652 (2013.01); B01L 2200/0663 (2013.01); B01L 2300/0645 (2013.01); B01L 2300/0877 (2013.01); B01L 2400/0406 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fluid ejection die, comprising:
a fluid feed slot to receive fluid from a reservoir;
an array of ejection chambers fluidly connected to the fluid feed slot, wherein each ejection chamber comprises:
at least one fluid actuator; and
an opening through which fluid is to be ejected; and
a number of antechambers to direct fluid towards the ejection chambers, wherein each antechamber comprises sidewalls that curve inward.