Printer with ink printhead nozzle arrangement having thermal bend actuator
First Claim
Patent Images
1. A printer comprising a housing, a print media feed path through the housing and at least one ink jet printhead for printing onto print media disposed on said feed path, the printhead including an array of nozzle arrangements, at least one nozzle arrangement comprising:
- a wafer substratean ink chamber formed therein;
an ink ejection port formed by a substantially centrally located rim on a wall of said chamber; and
at least one flexible portion located on said wall and outside said ink ejection port;
whereby the wall is adapted to move independently of said rim such that upon actuation the at least one flexible portion moves the wall into said ink chamber forcing ink therein, out through the said ink ejection port; 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 bend into said ink chamber upon heating of the at least one flexible pardon of the wall.
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Accused Products
Abstract
A printer has a printhead comprising an array of nozzles. A nozzle arrangement has an ink chamber formed in a wafer substrate and one wall of the chamber having at least one flexible portion. The ink ejection port is formed centrally on the wall with a rim surrounding it. The wall is adapted to move independently of the rim such that upon heating of the flexible portion of the wall, the wall bends into the ink chamber forcing ink therein out through the ejection port.
26 Citations
5 Claims
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1. A printer comprising a housing, a print media feed path through the housing and at least one ink jet printhead for printing onto print media disposed on said feed path, the printhead including an array of nozzle arrangements, at least one 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; and at least one flexible portion located on said wall and outside said ink ejection port; whereby the wall is adapted to move independently of said rim such that upon actuation the at least one flexible portion moves the wall into said ink chamber forcing ink therein, out through the said ink ejection port; 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 bend into said ink chamber upon heating of the at least one flexible pardon of the wall. - View Dependent Claims (2, 3, 4, 5)
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Specification
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Current AssigneeMemjet Technology Ltd. (Memjet Limited)
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Original AssigneeSilverbrook Research Pty Limited
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InventorsSilverbrook, Kia, McAvoy, Gregory John
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Primary Examiner(s)Do; An H.
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Application NumberUS11/084,753Publication NumberTime in Patent Office680 DaysField of Search347/54, 347/65US Class Current347/54CPC Class CodesB41J 2/1433 Structure of nozzle platesB41J 2/14427 Structure of ink jet print ...B41J 2/1623 bonding and adhesionB41J 2/1628 dry etchingB41J 2/1629 wet etchingB41J 2/1631 photolithographyB41J 2/1632 machiningB41J 2/1635 dividing the wafer into ind...B41J 2/1637 moldingB41J 2/1639 sacrificial moldingB41J 2/1642 thin film formation by CVD ...B41J 2/1648 Production of print heads w...B41J 2/17596 Ink pumps, ink valvesB41J 2002/041 Electromagnetic transducerB41J 2002/14346 Ejection by pressure produc...B41J 2002/14435 Moving nozzle made of therm...B41J 2002/14475 characterised by nozzle sha...B41J 2202/15 Moving nozzle or nozzle plateY10T 29/49401 Fluid pattern dispersing de...
