Cleaning apparatus having multiple wash tanks for carbon dioxide dry cleaning and methods of using same
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United States of America Patent
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Oct 3, 2006
Grant Date -
Oct 2, 2003
app pub date -
Mar 28, 2003
filing date -
Sep 24, 1999
priority date (Note) -
Expired
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Abstract
Cleaning apparatus having multiple wash tanks for washing articles in a carbon dioxide dry cleaning system employing a liquid carbon dioxide cleaning solution are provided. Cleaning apparatus having multiple wash tanks of the present invention may provide improved thermodynamic efficiency by allowing carbon dioxide vapor to be transferred between wash tanks rather than condensed. Cleaning apparatus having multiple wash tanks of the present invention may have a lower capital cost than multiple cleaning systems having single wash tanks. Cleaning apparatus having multiple wash tanks of the present invention include a first wash tank for contacting a first article with liquid carbon dioxide cleaning solution, and a second wash tank for contacting a second article with liquid carbon dioxide cleaning solution. The second wash tank is in fluid communication with the first wash tank. Methods of utilizing such cleaning apparatus are also provided. Coating apparatus having multiple coating tanks and methods of utilizing such coating apparatus are also provided.
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