Air extraction method for inkjet printhead
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United States of America Patent
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Jun 25, 2013
Grant Date -
Nov 1, 2012
app pub date -
Apr 28, 2011
filing date -
Apr 28, 2011
priority date (Note) -
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Abstract
A method of extracting air from an inkjet printhead includes using an air extraction chamber connected to the printhead. The air extraction chamber comprises an air chamber, a one-way relief valve having open and closed positions used in venting of the air chamber. A piston in the form of a disk is provided to vent a quantity of air from the air chamber through the one-way relief valve when it's pushed through a cylinder. The piston is moved in an opposite direction through the cylinder so that a reduced air pressure is applied to the printhead when the one-way relief valve is in its closed position.
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