Dust filter bag and filtering assembly

Claim 1

IN A DUST FILTERING APPARATUS HAVING A BODY TO WHICH A FABRIC FILTER TUBE IS SECURED BY SECURING MEANS AT EACH END OF SAID FILTER TUBE, THE IMPROVEMENT IN WHICH AT LEAST ONE OF SAID SECURING MEANS CONNECTS ONE END OF SAID TUBE IN OPEN FLUID COMMUNICATION WITH THE OTHER SIDE OF A PLATE, FORMING A PORTION OF SAID BODY THROUGH A HOLE IN SAID PLATE, BY MEANS OF A FLEXIBLE PLASTIC SHOCK AND TENSILE STRESS ABSORBING CONDUIT, SAID CONDUIT COMPRISING A CENTRAL HELICALLY CORRUGATED FLEXIBLE PLASTIC TUBE SECTION AND TWO END SECTIONS INTEGRAL THEREWITH, ONE OF SAID END SECTIONS SECURED AT ONE END TO SAID FILTER TUBE AND THE OTHER OF SAID END SECTION SECURED AT THE OTHER END TO SAID PLATE, ANNULAR REINFORCING SPRING WIRE RINGS, ONE BURIED IN SAID PLASTIC TUBE IN EACH END SECTION THEREOF AND SURROUNDING ONE PASSAGE THERETHROUGH, AND A HELICAL SPRING WIRE BURIED IN SAID PLASTIC TUBE AND FOLLOWING THE HELICAL CORRUGATIONS THEREOF, EACH END OF SAID HELICAL SPRING WIRE BEING SECURED TO THE RESPECTIVE ADJACENT SPRING WIRE RING.