Inkjet printhead nozzle with ribbed wall actuator
First Claim
Patent Images
1. An ink jet printhead nozzle arrangement comprising:
- a wafer substrate an ink chamber formed therein;
an ink ejection port formed by a substantially centrally located rim on a wall of said chamber;
at least one flexible portion located on said wall; and
rib elements located on the outer surface of said wall whereby the wall is adapted to move independently of said rim such that upon actuation the at least one flexible portion displaces and interacting with the rib elements moves said wall into said ink chamber forcing ink therein, out through the said ink ejection port;
wherein the wall is configured to bend into the ink chamber away from the centre of the ink chamber; and
wherein the said at least one flexible portion of said wall is made from material having a thermal expansion suitable to cause the wall to move into said ink chamber upon uneven heating of the at least one flexible portion of the wall.
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Abstract
An ink jet printhead nozzle arrangement having an ink chamber formed in a wafer substrate and one wall of said chamber having at least one flexible portion. The ink ejection port is formed substantially centrally on the wall with a rim surrounding it. The wall is adapted to move independently of said rim. Rib elements are located on the outer surface of the wall to restrict the wall movement such that upon actuation of the at least one flexible portion of the wall, the wall is forced to move into said ink chamber, forcing ink therein out through the said ejection port.
72 Citations
7 Claims
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1. An ink jet printhead nozzle arrangement comprising:
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a wafer substrate an ink chamber formed therein;
an ink ejection port formed by a substantially centrally located rim on a wall of said chamber;
at least one flexible portion located on said wall; and
rib elements located on the outer surface of said wall whereby the wall is adapted to move independently of said rim such that upon actuation the at least one flexible portion displaces and interacting with the rib elements moves said wall into said ink chamber forcing ink therein, out through the said ink ejection port;
wherein the wall is configured to bend into the ink chamber away from the centre of the ink chamber; and
wherein the said at least one flexible portion of said wall is made from material having a thermal expansion suitable to cause the wall to move into said ink chamber upon uneven heating of the at least one flexible portion of the wall. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification