Piezoelectric-drop-on-demand technology
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United States of America Patent
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Mar 25, 2003
Grant Date -
N/A
app pub date -
Oct 13, 2000
filing date -
May 31, 1993
priority date (Note) -
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Abstract
A method and apparatus for cleaning the interior of capillary tubes used to dispense 1 to 100 micron diameter liquid droplets by a piezoelectric transducer surrounding each capillary tube. Magnetic particles are aspirated into the capillary tubes and moved by an exterior magnet to cause deposits on the interior walls to be dislodged and subsequently discharged from the capillary tube. In a preferred embodiment, the magnetic particles are coated with a material capable of binding such deposits, e.g., DNA, RNA, and the like.
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