Pressure controlled ink jet printhead assembly

  • US 6,817,707 B1
  • Filed: 06/18/2003
  • Issued: 11/16/2004
  • Est. Priority Date: 06/18/2003
  • Status: Active Grant
First Claim
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1. An ink jet printhead assembly for a pressure controlled ink jet printhead comprising:

  • an ink reservoir having an open top cavity defined by sidewalls, a bottom wall and a peripheral edge, the ink reservoir being made of a first material having a first melting point;

    a pressure control structure having a first surface, a second surface opposite the first surface, a side surface, and an aperture extending therethrough from the first surface to the second surface, the pressure control structure being made of a polymeric material having a second melting point lower than the first melting point;

    a sealing structure for forming a liquid tight seal between the sidewalls of the ink reservoir and the side surface of the pressure control structure;

    a pressure regulating film attached to the first surface of the pressure control structure closing the aperture therein; and

    a cover attached to the ink reservoir to protect the pressure regulating film from damage.

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