Liquid ejection apparatus
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United States of America Patent
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Mar 15, 2011
Grant Date -
May 22, 2008
app pub date -
Nov 21, 2007
filing date -
Nov 22, 2006
priority date (Note) -
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Abstract
A liquid ejection apparatus includes a liquid ejection head that ejects a liquid and a switching device. The switching device includes a first ON-OFF valve that selectively opens and closes a first supply passage at a position upstream from the joining point, and a second ON-OFF valve that selectively opens and closes a second supply passage at a position upstream from the joining point. When the first ON-OFF valve is open and the second ON-OFF valve is closed, the liquid guide portion divides the first liquid into a first liquid flow proceeding from the first supply passage directly to the head supply passage and a second liquid flow flowing from the first supply passage into the head supply passage after passing the vicinity of the second ON-OFF valve in the second supply passage. When the first ON-OFF valve is closed and the second ON-OFF valve is open, the liquid guide portion divides the second liquid into a third liquid flow proceeding from the second supply passage directly to the head supply passage and a fourth liquid flow flowing from the second supply passage into the head supply passage after passing the vicinity of the first ON-OFF valve in the first supply passage.
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