Inkjet printer with a pagewidth printhead having nozzle arrangements with an actuating arm having particular dimension proportions
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United States of America Patent
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-
Jul 28, 2009
Grant Date -
Oct 2, 2008
app pub date -
Jun 13, 2008
filing date -
Jul 15, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An inkjet printer has a pagewidth printhead with a plurality of nozzle arrangements. Each nozzle arrangement includes a substrate with an inlet channel etched therethrough, and nozzle chamber walls and a roof to define an ink chamber, with an ink ejection port defined in the roof inline with the inlet channel. The nozzle arrangement includes a thermal actuating arm inside the chamber, an upper side of the arm defining a displacement area that acts on ink in the chamber to eject ink via the ejection port. The displacement area is greater than half an area of the ink ejection port but less than twice the area of the ink ejection port.
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