The carriage performs the actual printing on the substrate. It is moved across the print platen and
contains the printheads and the necessary electronic components to print. The printheads are held
into the carriage by a latch. A primer assembly is responsible for squeezing ink out of the printhead
nozzles to remove clogging and maintain printhead health. This primer assembly blows pressured air
through the latch that is directed inside the printhead.
To do so we propose a single 3d printed part that has internal channels to route the air.
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INC, HP, "3D PRINTED PRIMER LATCH", Technical Disclosure Commons, (August 05, 2019)