Patent ID: 6478406
Filing Date: 2002-11-12
Classification: B41J

Abstract:
A liquid ejection device including:a fluid chamber having: a fluid outlet port in a wall of the chamber; a fluid inlet port in a wall of the chamber; a paddle located in the chamber between the fluid outlet port and the fluid inlet port and having a front surface and a rear surface and moveable in a forward direction between a rest position and an ejection position, for ejecting fluid from the chamber through the outlet port as it moves from the rest position to the ejection position; at least one aperture between the paddle and the chamber wall or walls when the paddle is at the rest position, the ejection position and positions there between, such that fluid may flow between the front and rear of the paddle via the at least one aperture; and, the paddle including first means to reduce fluid flow chamber through the at least one aperture toward the inlet port as the paddle moves from the rest position to the ejection position.