Ink jet nozzle rim

An ink jet nozzle assembly including:

• a nozzle chamber having an inlet in fluid communication with an ink reservoir and a nozzle through which ink from the chamber can be ejected;
• the chamber including a fixed portion and a movable portion configured for relative movement in an ejection phase and alternate relative movement in a refill phase;
• a flexible arm and a rigid arm each connected with the movable portion and configured to cooperate, under the effect of at least one of thermal expansion and thermal contraction, to effect periodically said relative movement;
• and
• the inlet being positioned and dimensioned relative to the nozzle such that ink is ejected preferentially from the chamber through the nozzle in droplet form during the ejection phase, and ink is alternately drawn preferentially into the chamber from the reservoir through the inlet during the refill phase.