Opposed ejection ports and ink inlets in an ink jet printhead chip
First Claim
1. A printhead chip for an ink jet printhead, the printhead chip comprisingan elongate substrate;
- and a plurality of nozzle arrangements that are positioned along a length of the substrate, the substrate defining a plurality of ink inlet channels, each ink inlet channel being in fluid communication with a respective nozzle arrangement, each nozzle arrangement comprising nozzle chamber walls and a roof that define a nozzle chamber, the roof defining an ink ejection port;
an ink ejection member that is positioned within the nozzle chamber and is displaceable towards and away from the ink ejection port to eject ink from the nozzle chamber, the nozzle chamber walls and the roof being configured so that the nozzle chamber is generally elongate and has a distal end and an opposed proximal end, the ink inlet channel of the nozzle chamber being positioned adjacent the proximal end and the ink ejection port being positioned adjacent the distal end; and
an actuator that is mounted on the substrate, the actuator being electrically connected to drive circuitry positioned on the substrate to drive the actuator and the actuator being connected to the ink ejection member to displace the ink ejection member towards and away from the ink ejection port, the nozzle chamber walls and roof being dimensioned so that a fluid flow path defined between the ink ejection port and the ink inlet channel is configured to retard ink flow between the ink ejection port and the ink inlet channel during ejection of ink from the ink ejection port.
2 Assignments
0 Petitions
Accused Products
Abstract
A printhead chip for an ink jet printhead includes an elongate substrate. A plurality of nozzle arrangements is positioned along a length of the substrate. An ink inlet channel is in fluid communication with a respective nozzle arrangement. Each nozzle arrangement includes a nozzle chamber and an ink ejection port. An ink ejection member is positioned within the nozzle chamber and is displaceable towards and away from the ink ejection port to eject ink from the nozzle chamber. The nozzle chamber is generally elongate and has a distal end and an opposed proximal end. The inlet channel of the nozzle chamber is positioned adjacent the proximal end and the ink ejection port is positioned adjacent the distal end. An actuator is mounted on the substrate and is electrically connected to drive circuitry positioned on the substrate to drive the actuator and to the ink ejection member to displace the ink ejection member towards and away from the ink ejection port. The nozzle chamber is dimensioned so that a fluid flow path defined between the ink ejection port and the ink inlet channel is configured to retard ink flow between the ink ejection port and the ink inlet channel during ejection of ink from the ink ejection port.
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Citations
22 Claims
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1. A printhead chip for an ink jet printhead, the printhead chip comprising
an elongate substrate; - and
a plurality of nozzle arrangements that are positioned along a length of the substrate, the substrate defining a plurality of ink inlet channels, each ink inlet channel being in fluid communication with a respective nozzle arrangement, each nozzle arrangement comprising nozzle chamber walls and a roof that define a nozzle chamber, the roof defining an ink ejection port;
an ink ejection member that is positioned within the nozzle chamber and is displaceable towards and away from the ink ejection port to eject ink from the nozzle chamber, the nozzle chamber walls and the roof being configured so that the nozzle chamber is generally elongate and has a distal end and an opposed proximal end, the ink inlet channel of the nozzle chamber being positioned adjacent the proximal end and the ink ejection port being positioned adjacent the distal end; and
an actuator that is mounted on the substrate, the actuator being electrically connected to drive circuitry positioned on the substrate to drive the actuator and the actuator being connected to the ink ejection member to displace the ink ejection member towards and away from the ink ejection port, the nozzle chamber walls and roof being dimensioned so that a fluid flow path defined between the ink ejection port and the ink inlet channel is configured to retard ink flow between the ink ejection port and the ink inlet channel during ejection of ink from the ink ejection port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A printhead chip for an ink jet printhead, the printhead chip comprising
an elongate substrate; - and
a plurality of nozzle arrangements that are positioned along a length of the substrate, the substrate defining a plurality of ink inlet channels, each ink inlet channel being in fluid communication with a respective nozzle arrangement, each nozzle arrangement comprising a nozzle chamber structure that at least partially defines a nozzle chamber, the nozzle chamber structure having a roof that defines an ink ejection port, the nozzle chamber structure being configured so that the nozzle chamber is generally elongate and has a distal end and an opposed proximal end, the ink inlet channel of the nozzle arrangement being positioned adjacent the proximal end and the ink ejection port being positioned adjacent the distal end;
an actuator that is mounted on the substrate, the actuator being electrically connected to drive circuitry positioned on the substrate to drive the actuator and the actuator being connected to the nozzle chamber structure at the proximal end of the nozzle chamber so that the actuator can displace the nozzle chamber structure towards and a way from the substrate; and
a static member that is mounted on the substrate intermediate the ink ejection port and the substrate so that displacement of the structure towards and away from the substrate results in the ejection of a drop of ink from the ink ejection port, the structure being dimensioned so that a fluid flow path defined between the ink ejection port and the ink inlet channel is configured to retard a flow of ink from the ink ejection port to the ink inlet channel when the structure is displaced towards the substrate. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification