Ink jet ejector
AssigneeSilverbrook Research Pty Ltd
InventorKia Silverbrook
Life of this patent
Estimating the term…
Abstract
A paddle (5) for a liquid ejection device (1) is located in a chamber (2) and is moveable in a forward direction between a rest state and an ejection state, for ejecting fluid from the chamber through an outlet port (11) as it moves from the rest state to the ejection state. The paddle (5) is positioned to substantially close an inlet port (3) when in the rest state and the paddle (5) and the inlet port (3) define an aperture (16) between themselves. The paddles (5) includes means (12) to reduce fluid flow through the aperture (16) toward the inlet port (3) as the paddle (5) moves from the rest state to the ejection state.
Claims27
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 and moveable in a forward direction between a rest state and an ejection state, for ejecting fluid from the chamber through the outlet port as it moves from the rest state to the ejection state;
- the paddle positioned to substantially close the inlet port when in the rest state, the paddle and the inlet port defining an aperture there between;
- and,
- the paddle including first means to reduce fluid flow through the aperture as the paddle moves from the rest state to the ejection state.
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 and moveable in a forward direction between a rest state and an ejection state, for ejecting fluid from the chamber through the outlet port as it moves from the rest state to the ejection state;
- wherein the paddle is positioned to substantially close the inlet port when in the rest state, the paddle and the port defining an aperture there between;
- and,
- wherein the paddle has a forward surface, the forward surface having a central portion and a peripheral portion, at least part of the peripheral portion extending outwardly from the central portion in the forward direction.
A liquid ejection device including:
- a fluid chamber having;
- a fluid outlet port in a first wall of the chamber;
- a fluid inlet port in a second wall of the chamber, the second wall of the chamber being opposite the first wall;
- a paddle located in the chamber and moveable from a rest state to an ejection state in a forward direction toward the outlet port, for ejecting fluid from the chamber through the outlet port;
- the paddle being positioned so as to define an aperture between the paddle and the inlet in the rest position;
- and,
- the paddle including first means to reduce fluid flow through the aperture as the paddle moves from the rest state to the ejection state.
A liquid ejection device including:
- a fluid chamber having:
- a fluid outlet port in a wall of the chamber;
- a substantially circular fluid inlet port in a wall of the chamber;
- a substantially circular paddle located in the chamber and moveable in a forward direction from a rest state to an ejection state, for ejecting fluid from the chamber through the outlet port;
- the paddle being positioned radially inwardly of the inlet to define an annular aperture there between;
- and,
- the paddle including first means to reduce fluid flow through the aperture as the paddle moves from the rest state to the ejection state.
Dependencies are inferred from the claim text.