Printing liquid droplet ejector apparatus

摘要

In a printing liquid droplet ejector, a liquid holding unit (22) in a cavity (12) has a volume sufficient to hold some of the printing liquid in the cavity and is mechanically translatable toward an opening (18) in a nozzle. The liquid holding unit is volumetrically alterable to reduce its volume to cause at least some of the printing liquid held by the unit to be expelled from the unit, to in turn cause either printing liquid expelled from the unit or other printing liquid in the cavity to be ejected from the opening as at least one droplet, when the unit is mechanically translated toward the opening. <IMAGE>