Dry cleaning method and apparatus therefor
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United States of America Patent
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Nov 2, 2010
Grant Date -
Oct 8, 2009
app pub date -
Mar 6, 2009
filing date -
Oct 29, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The object is to determine a suitable stop timing of dry cleaning operation in a dry cleaning method without an oil-soluble surface-active agent. Contamination level of a pure solvent supplied from a supply tank to an inner drum of a process tank by a supply-side pump is detected by a supply-side RGB sensor. Contamination level of a used solvent collected from the process tank to a distilling unit by a collect-side pump is detected by a collect-side RGB sensor. When the deference of the contamination levels becomes to zero, a control unit stops supplying the pure solvent from the supply tank to the process tank, collecting the used solvent from the process tank to the distilling unit.
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