PRINTHEAD INTEGRATED CIRCUIT WITH A SOLENOID PISTON
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United States of America Patent
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app pub date -
Jan 15, 2012
filing date -
Aug 11, 1997
priority date (Note) -
Abandoned
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Abstract
A printhead integrated circuit comprising a wafer substrate defining a nozzle outlet port; an electromagnetic piston mounted to the wafer substrate via torsion springs, said piston operatively forced towards the outlet port when activated; and a solenoid coil positioned on the wafer substrate about the piston to activate the piston when a current is passed through the coil. The piston is magnetised during a final high temperature step in a fabrication process of the nozzle apparatus to ensure that the Curie temperature is not exceeded after magnetisation
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