Reducing the concentration of solvent vapors in drycleaning machines
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United States of America Patent
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-
Nov 21, 1995
Grant Date -
N/A
app pub date -
Apr 19, 1994
filing date -
Apr 19, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus and method for reducing the concentration of solvent vapor in the drum of a drycleaning machine upon completion of a cleaning and drying operation, during which articles are cleaned in the drycleaning machine, the drycleaning machine being of the type having a drum, and a solvent recovery system communicating with the drum for recovering solvent from solvent-laden air circulated through the solvent recovery system and the drum during a drying and solvent recovery cycle, the apparatus and method including an arrangement for circulating solvent-laden air from the drum through the solvent recovery system during the drying and recovery cycle, and closing communication between the drum and the solvent recovery system during a post-recovery cycle, subsequent to the drying and recovery cycle, and then circulating solvent-laden air from the drum through an adsorption unit during the post-recovery cycle to reduce the concentration of solvent vapor in the drum to an acceptable level prior to accessing the drum for removal of the cleaned articles.
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