CPC B41J 2/19 (2013.01) [B29C 64/321 (2017.08); B33Y 40/00 (2014.12)] | 15 Claims |
1. An air purging unit for an imaging device, comprising:
a barrel;
a fluid-flow channel, one end of the fluid-flow channel being connected to the barrel and another end of the fluid-flow channel being removably couplable to an inlet of a housing of the imaging device, the inlet being couplable to a fluid delivery tube from a fluid storage chamber to deliver a printing fluid to a cartridge;
a piston element forming an air-tight seal inside the barrel;
a spring element, in a biased state, connected between an inner surface of the barrel and the piston element; and
a locking unit to lock the piston element and retain the spring element in the biased state, wherein the locking unit is unlockable to release the piston element, break the air-tight seal, and unbias the spring element to remove air from the fluid delivery tube through the inlet prior to coupling the cartridge to the inlet.
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