Asymmetric restrictor for ink jet printhead
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United States of America Patent
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Aug 29, 2000
Grant Date -
N/A
app pub date -
Aug 1, 1997
filing date -
Aug 1, 1997
priority date (Note) -
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Abstract
An ink jet comprises a restrictor with an asymmetrical opening that creates a vortex in the ink flowing into an ink jet chamber. The vortex is created as the ink in an ink manifold is transferred from the ink manifold to the ink jet chamber. The asymmetrical geometry of the opening, in which a throat of the opening is laterally offset with respect to a vertical center line dividing the opening, creates a vortex in the ink flow within the ink jet chamber. The vortex creates a swirling motion which helps to sweep air bubbles trapped in the ink jet chamber toward an ink droplet ejection orifice so that an air bubble purge system can then easily expel the air bubbles through the ink droplet ejection orifice. By removing the trapped air bubbles, jet outages can be prevented.
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