US 12,409,607 B2
Gas control systems for purging a printhead manufacturing apparatus
Vadim Bromberg, Niskayuna, NY (US)
Assigned to General Electric Company, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Sep. 1, 2022, as Appl. No. 17/901,334.
Prior Publication US 2024/0075688 A1, Mar. 7, 2024
Int. Cl. B29C 64/35 (2017.01); B08B 9/032 (2006.01); B08B 9/035 (2006.01); B29C 64/165 (2017.01); B29C 64/209 (2017.01); B33Y 30/00 (2015.01); B33Y 40/00 (2020.01)
CPC B29C 64/35 (2017.08) [B08B 9/0325 (2013.01); B08B 9/035 (2013.01); B29C 64/209 (2017.08); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); B29C 64/165 (2017.08)] 20 Claims
OG exemplary drawing
 
1. A gas control system comprising:
a positive pressure vessel;
a negative pressure vessel;
a first pressure control valve configured to control a first flow of gas to and from a first manifold of a printhead assembly; and
a second pressure control valve configured to control a second flow of gas to and from a second manifold of the printhead assembly,
wherein during a normal positive pressure mode, a primary flow of gas forming the first flow of gas and the second flow of gas flows from the positive pressure vessel to the first manifold and the second manifold through a respective one of the first pressure control valve and the second pressure control valve,
wherein during a positive pressure purge mode, the first flow of gas and the second flow of gas from the positive pressure vessel bypasses the first pressure control valve and the second pressure control valve to flow to the first manifold and the second manifold.