US 12,304,218 B2
Recirculation devices with check valve
David Butinya Teixido, Sant Cugat del Valles (ES); Dorkaitz Alain Vazquez Fernandez, Sant Cugat del Valles (ES); and Josep Ortiz Mompel, Sant Cugat del Valles (ES)
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
Appl. No. 17/995,721
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Apr. 9, 2020, PCT No. PCT/US2020/027466
§ 371(c)(1), (2) Date Oct. 7, 2022,
PCT Pub. No. WO2021/206717, PCT Pub. Date Oct. 14, 2021.
Prior Publication US 2023/0136963 A1, May 4, 2023
Int. Cl. B41J 2/18 (2006.01); B41J 2/175 (2006.01)
CPC B41J 2/18 (2013.01) [B41J 2/17596 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method to recirculate print agent in a printing system:
detecting a recirculation device comprising a check valve to allow fluid flow in a fluid passing direction but to prevent fluid flow in a fluid blocking direction, the fluid blocking direction being opposite to the fluid passing direction;
detecting a printhead connected in parallel to the detected recirculation device;
selecting a printhead circulation mode to circulate print agent through the detected printhead;
selecting a recirculation device circulation mode to circulate print agent through the detected recirculation device, wherein the detected printhead and the detected recirculation device are located on a same printhead support.