Dry cleaning system with a replaceable filter cartridge and means for venting solvent fumes

Claim 1

IN COMBINATION, A CLOTHES CLEANING APPARATUS HAVING A VERTICAL SPIN TUB AND MEANS FOR AGITIATING IN SIAD TUB AND SPINNING SAID TUB, SAID CLEANING APPARATUS INCLUDING A SOLVENT CONTAINER FOR ENCLOSING SAID SPIN TUB AND HAVING A TOP ACCESS OPENING, A CLOTHER DRYER ADJACENT SAID CLEANING APPARATUS HAVING A ROTATABLE TUMBLING DRUM AND AN ACCESS DOOR TO SAID TUMBLING DRUM ABOVE SAID TOP ACCESS OPENING AND ADJACENT ONE SIDE THEREOF, MEANS FORMING A FILTER COMPARTMENS ADJACENT SAID CLESANING APPARATUS AND SAID CLOTHES DRYER AND ENCLOSING A SUMP, MEANS FORMING A FILTER CHAMBER HAVING A CLOSED END AND A SELECTIVELY OPENABLE SERVICE ACCESS END, A PERMANENTLY UNITARY REPLACEABLE FILTER CARTRIDGE INSERTABLE THROUGH SAID SERVICE ACCESS END TO SAID CHAMBER, SAID CARTRIDGE INCLUDING A PLURALITY OF FILTERING STAGES IN PERMANENTLY FIXED RELATIONSHIP TO EACH OTHER, INLET CONDUIT MEANS CONNECTING SAID SUMP TO SAID FILTER CHAMBER ON ONE SIDE OF SAID FILTER CARTRIDGE, SUPPLY CONDUIT MEANS CONNECTING SAID FILTER CHAMBER ON THE OTHER SIDE OF SID FILTER CARTRIDGE TO SAID SPIN TUB, PUMP MEANS CONNECTED IN PUMPING RELATIONSHIP TO SAID INLET CONDUIT MEANS AND SAID SUPPLY CONDIUT MEANS IN A MANNER TO EFFECT FLOW FROM SAID INLET CONDUIT MEANS THROUGH SID FILTER CARTRIDGE TO SAID SUPPLY CONDUIT MEANS, AND RETURN CONDUIT MEANS CONNECTING THE SOLVENT CONTAINER TO SAID SUMP, WHEREBY SOLVENT IS ADAPTED FOR CIRCULATION FROM SAID SUMP THROUGH SAID FILTER CAR-