Filter type cigarette and method of making same

Claim 1

IN A CIGARETTE, A SELF-CONTAINED ASSEMBLY COMPRISING A TUBULAR WRAPPER, A BODY OF FIBROUS MATERIAL IN SAID WRAPPER LONGITUDINALLY ORIENTED FOR SMOKE PASSAGE LONGITUDINALLY THROUGH THE CIGARETTE, AND MEANS COMPRISING A GENERALLY CIRCULAR METAL BAND LOCATED INSIDE OF AND SECURED TO SAID WRAPPER, SAID CIRCULAR BAND BEING MANUALLY COMPRESSIBLE FROM ANNULAR TO ELLIPTICAL FORM TO THEREBY COMPACTINGLY COMPRESS THE BODY FIBERS INTO A VENTURI RESTRICTION PASSAGEWAY THROUGH WHICH SMOKE MUST TRAVEL AT AN ACCELERATED HIGH SPEED WHEN MOVING FROM A DOWNSTREAM TO AN UPSTREAM SIDE OF THE CONSTRICTION, THE METAL BEING OF SUCH A CHARACTERISTIC AS TO TAKE A SET AFTER BEING COMPRESSED SO AS TO MAINTAIN THE FIBERS IN A COMPACTED POSITION, THE FIBERS OF THE BODY ON THE DOWNSTREAM SIDE OF THE CONSTRICTION PROVIDING AN IMPINGEMENT BARRIER AGAINST WHICH THE HIGH SPEED SMOKE IMPINGES, WHEREBY HIGH TEMPERATURE TARS ARE COLLECTED ON THE BARRIER FIBERS AND THE SMOKE THEN MOVES ON DOWNSTREAM THROUGH THE BODY MINUS SUCH TARS.