Patent Number: 7,784,912

Title: Printhead arrangement having nozzle assemblies with gutter formations

Abstract: Provided is a printhead arrangement for a printer. The arrangement includes a wafer substrate and a layer of drive circuitry deposited on the substrate, as well as a plurality of nozzle assemblies formed on the wafer substrate by means of micro-electromechanical (MEMS) techniques. Each of these assemblies includes an ink chamber and at least one ink supply channel etched into the substrate, a heater element suspended in the ink chamber, and a nozzle plate defining two ink ejection nozzles, the plate having gutter formations about each nozzle to facilitate ink run-off from the nozzle to prevent nozzle contamination. The drive circuitry facilitates activation of the heater element.

Inventors: Silverbrook; Kia (Balmain, AU)

Assignee: Silverbrook Research Pty Ltd

International Classification: B41J 2/05 (20060101)

Expiration Date: 8/31/12018