Abstract: An apparatus for recovery of a solvent gas involved in the drying of goods treated with an organic solvent with the aid of an air stream in a dry-cleaning machine. In this machine the goods are dried by an air flow circulating in a closed circulation loop which is heated before contact with the goods and after contact is again cooled for condensation of solvent vapor. In a second stage of the recovery, the socalled reduction stage, the goods are cooled by shutting off the heat. For recovery of the residual solvent vapor still remaining in the air after cooling the air stream is subsequently fed through an adsorption unit. During the cooling only a portion of the cooled air is supplied for adsorption and after that is fed back in the air circulation loop circulating over the goods. This has been accomplished by providing a circulation branch having an adsorption unit substantially parallel to a portion of the circulation loop and an additional blower.

Abstract: The apparatus recovers solvent vapor and is used in a process for drying goods. A closed system of pipes guides an air flow through a heat exchanger comprising a condenser and an air heater. The system of pipes has a blower for providing a circulation forming this air flow and a switching means for the air flow comprising a plurality of valves and at least one pipe segment by which an adsorber is connectable in series in the circulation with a processing container. The adsorber is connectable by the blower or directly in the circulation with an outlet of the processing container. Advantageously at least one other pipe segment bypassing the heat exchanger with the switching means is provided so that the circulation only runs through the processing container, the blower and the adsorber without running through the heat exchanger. Furthermore at least one additional pipe segment and at least one additional switching means are provided bypassing the processing container.

Abstract: A filter device for a cleaning machine includes a plurality of disk-like filter elements accommodated within a casing and connected to a hollow shaft to be rotatable therewith. Arranged between adjacent filtering elements are stationary disks which extend from the casing inner wall towards the shaft. Each disk is provided at its both sides facing the filtering surface of the filtering elements with at least one rib which extends in radial direction and projects towards the filtering surfaces. These ribs cooperate with projections provided on the filtering elements in such a manner that only a narrow gap is defined when the projections pass the stationary ribs during rotation of the filtering elements. Consequently, the ribs and the projections work like vanes of a turbine and cause strong currents to provide a cleaning effect of the filter fabric.