Dry cleaning process

Claim 1

IN A CLEANING SYSTEM FOR DRY CLEANING IN WHICH CLEANING OPERATIONS ARE NORMALLY AFFECTED BY CIRCULATING CLEANING FLUID FROM A SUMP TO A FILTER TANK AND THENCE TO A CLEANING CHAMBER AND RETURN, THE PROCESS OF RECONDITIONING CONTAMINATED FLUID COMPRISING: (A) PERIODICALLY STOPPING THE NORMAL CIRCULATION OF FLUID FOR CLEANING OPERATIONS AND ALLOWING THE SYSTEM TO STAND IDLE FOR A PERIOD OF TIME THEREBY COLLECTING LIGHTER CONTAMINANTS IN THE FLUID NEAR THE TOP OF THE TANK AND HEAVIER CONTAMINANTS IN THE FLUID NEAR THE BOTTOM OF THE TANK; (B) PERIODICALLY ESTABLISHING A FLOW PATTERN FROM THE TOP OF THE TANK TO A SOLVENT RECONDITIONING STRUCTURE TO DRAW OFF FLUID CONTAMINATED WITH THE COLLECTED LIGHT CONTAMINANTS WHILE THE NORMAL CIRCULATION WAS STOPPED; (C) PERIODICALLY ESTABLISHING A FLOW PATTERN FROM THE BOTTOM OF THE TANK TO THE RECONDITIONING STRUCTURE TO DRAW OFF FLUID CONTAMINATED WITH THE COLLECTED HEAVIER CONTAMINANTS WHILE THE NORMAL CIRCULATION WAS STOPPED; (D) THEREAFTER TREATING THE CONTAMINATED FLUID IN THE RECONDITIONING STRUCTURE TO SEPARATE THE CLEANING FLUID FROM CONTAMINANTS AND THEREBY RECONDITION THE FLUID; AND, (E) THEREAFTER DELIVERING THE RECONDITIONED FLUID TO THE SUMP.