Filtering device for dry cleaning

Claim 1

A dry cleaning system for cleaning clothes by cleaning solvent circulating therethrough, comprising a drum in which the clothes to be cleaned are placed, a tank for receiving the cleaning solvent after use in the drum for washing, a pump for circulating the cleaning solvent in the tank to the drum, a first filtering device situated between the drum and the pump for removing impurities dissolved in the cleaning solvent before re-using the solvent, and at least one second filtering device connected to the first filtering device for removing solid impurities before the soluble impurities are removed at the first filtering device, said second filtering device comprising a casing including a front door and a rear end wall having an annular shoulder projecting inwardly therefrom, an inlet conduit means situated in said casing and passing through the rear end wall, said inlet conduit means having a plurality of perforations at the periphery thereof and a threaded front projection, outlet conduit means at the rear end wall of the casing, a first filter assembly including an elongated base member to substantially cover said inlet conduit means and to snugly fit with the annular shoulder of the rear end wall, said base member having a plurality of perforations at the periphery thereof, a plurality of flanges detachably connected around said base member and first filter means carried by said flanges to substantially cover said base member, said threaded front projection of the inlet conduit means extending through the front flange of the first filter assembly and being fastened by a nut to thereby position the first filter assembly around the inlet conduit means, spacer means situated between said first filter means and said casing, said spacer means including a porous wall and a plurality of ribs provided at the outer periphery of the porours wall, and a plurality of second filter assemblies situated between the flanges of the first filter assembly, each second filter assembly including a frame having outer vertical flanges abutting said flanges of said first filter assembly and a perforated wall having a contracted section intermediate the ends thereof, and second filter means replaceably supported by said outer flanges of the second filter assembly, whereby the cleaning solvent flowing from the tank into the second filtering device through the inlet conduit means passes through the second and first filter means, so that the solid impurities are removed, and flows through spaces between the spacer means, and the solvent is transferred to the first filtering device by means of the outlet conduit means.