| abstract |
The invention provides for a nozzle assembly for a printer. The assembly includes a substrate and drive circuitry on the substrate. A plurality of layers is stacked on the substrate to define an ink chamber with an ink ejection port. A magnetic plunger is positioned within the ink chamber below the ejection port. Also included is a toroidal electromagnet device connected to the drive circuitry, positioned about the plunger and fast with the stack layer, and a number of springs connecting the electromagnet device and the plunger, to restrict movement of the plunger relative to the electromagnet device. |