Patent ID: 6726310
Filing Date: 2004-04-27
Classification: B41J

Abstract:
A printing liquid droplet ejector, comprising:a cavity for containing a printing liquid; a nozzle having a droplet ejection opening at said cavity; a liquid holding unit in said cavity having a volume sufficient to hold some of the printing liquid in said cavity, being mechanically translatable toward said opening, and being volumetrically alterable to reduce its volume by having a component that is displaceable relative to the remainder of said unit to cause at least some of the printing liquid held by said unit to be expelled from said unit to in turn cause either printing liquid expelled from said unit or other printing liquid in said cavity to be ejected from said opening as at least one droplet when said unit is mechanically translated toward said opening; and a force applying device for applying a motive force to said liquid holding unit including to said component to mechanically translate the unit towards said opening and volumetrically alter said unit to reduce its volume by displacing said component relative to the reminder of said unit.