Inkjet printing apparatus
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United States of America Patent
Stats
-
Sep 9, 2014
Grant Date -
Mar 6, 2008
app pub date -
Aug 24, 2007
filing date -
Aug 31, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An ink jet printing apparatus includes a print head having an ejection port surface with ejection ports formed therein from which ink is ejected, a cap covering the ejection port surface of the print head, and a suction unit for allowing a pump to generate negative pressure in the cap to suck ink from the print head. The suction unit has a valve provided in a communication tube joining the pump and the cap together. The suction unit sucks ink under a relatively low negative pressure and then switches the valve to suck the ink under a relatively high negative pressure.
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Cited Art Landscape
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