Inkjet printhead having convex wall bubble chamber

  • US 6,719,405 B1
  • Filed: 03/25/2003
  • Issued: 04/13/2004
  • Est. Priority Date: 03/25/2003
  • Status: Active Grant
First Claim
Patent Images

1. An inkjet printhead, comprising:

  • a substantially rectangular heater element having a periphery with a length and width dimension such that an aspect ratio of said length dimension to said width dimension is greater than about 2.0;

    a bubble chamber having a convex wall portion partially surrounding said heater element, said convex wall portion having an arc with a radius that is greater than about 0.5 said width dimension and less than about 0.5 said length dimension and none of said convex wall portion overlies said periphery of said heater element; and

    a nozzle plate having a thickness with an orifice therein, an ink ejection side of said orifice being directly above said heater element.

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