US 12,403,695 B2
Print apparatus maintenance
Gianni Cessel, Sant Cugat del Valles (ES); Carles Carmona Calpe, Sant Cugat del Valles (ES); Marcos Casaldaliga Albisu, Sant Cugat del Valles (ES); Pablo Carmelo Mena Rodriguez, Sant Cugat del Valles (ES); Lluis Abello Rosello, Sant Cugat del Valles (ES); Ma. Pilar Velazquez Gomez, Sant Cugat del Valles (ES); Ricard Silvestre, Sant Cugat del Valles (ES); Jaume Verges Llahi, Sant Cugat del Valles (ES); Dorkaitz Alain Vazquez Fernandez, Sant Cugat del Valles (ES); Jordina Torrents Barrena, Sant Cugat del Valles (ES); and Maurizio Bordone, Sant Cugat del Valles (ES)
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
Appl. No. 18/557,635
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Apr. 28, 2021, PCT No. PCT/US2021/029716
§ 371(c)(1), (2) Date Oct. 27, 2023,
PCT Pub. No. WO2022/231585, PCT Pub. Date Nov. 3, 2022.
Prior Publication US 2024/0208228 A1, Jun. 27, 2024
Int. Cl. B41J 2/165 (2006.01); B41J 2/045 (2006.01); B41J 2/21 (2006.01)
CPC B41J 2/16579 (2013.01) [B41J 2/0451 (2013.01); B41J 2/04586 (2013.01); B41J 2/16535 (2013.01); B41J 2/2139 (2013.01); B41J 2/2142 (2013.01); B41P 2235/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A print apparatus comprising:
a print fluid application unit having a plurality of nozzles through which print fluid is to be deposited onto a printable medium during a printing operation;
a nozzle cleaning surface to engage nozzles during a nozzle cleaning operation;
a scanning unit; and
a controller to:
control the print fluid application unit to deposit print fluid from nozzles of the plurality of nozzles according to an intended pattern onto the nozzle cleaning surface;
control the scanning unit to scan the pattern formed on the nozzle cleaning surface; and
responsive to determining, based on the scan, that print fluid from a nozzle of the plurality of nozzles has not been deposited according to the intended pattern, generate an instruction signal regarding maintenance of the print fluid application unit.