Cigarette construction

Claim 1

IN A CIGARETTE HAVING AN ELONGATED, SUBSTANTIALLY CYLINDRICAL SUPPLY OF TOBACCO TERMINATING IN LIGHTABLE AND DOWNSTREAM ENDS, RESPECTIVELY, A FIRST FILTER SECTION ABUTTED AGAINST THE DOWNSTREAM END OF THE TOBACCO SUPPLY, SMOKE FLOW IMPEDING MEANS DOWNSTREAM FROM THE ABUTTED AGAINST SAID FIRST FILTER SECTION, A SECOND FILTER SECTION DOWNSTREAM FROM AND ABUTTED AGAINST SAID SMOKE FLOW IMPEDING MEANS, ALL IN SUBSTANTIAL AXIAL ALIGNMENT, AND WRAPPER MEANS UNITING THE TOBACCO SUPPLY, FILTER SECTIONS, AND SMOKE FLOW IMPEDING MEANS, SAID SMOKE FLOW IMPEDING MEANS COMPRISING AN INSERT INCLUDING, AS INTEGRAL PARTS THEREOF, A CYLINDRICAL OUTER SKIRT SNUGLY MOUNTED WITHIN THE WRAPPER MEANS IN THE CIGARRETE, AN ANNULAR WEB FLUSH WITH THE UPSTREAM END OF THE SKIRT AND JOINED TO THE SKIRT ABUTTED AGAINST SAID FIRST FILTER SECTION AND OPERABLE TO CLOSE OFF A PORTION OF THE END OF THE FIRST FILTER SECTION, A CENTRAL WALL EXTENDING TRANSVERSELY OF THE CIGARETTE AND DISPOSED BETWEEN THE ENDS OF THE SKIRT, A SMOKE ACCELERATING ORIFICE EXTENDING AXIALLY IN SAID WALL, AND AN INNER ANNULAR SKIRT JOINING OUTER MARGINS OF SAID WALL AND INNER MARGINS OF SAID ANNULAR WEB, SAID INNER ANNULAR SKIRT DEFINING A FIRST CHAMBER UPSTREAM OF SAID WALL WHICH, IN A CROSS-SECTIONAL VIEW OF THE CHAMBER TAKEN PERPENDICULARLY OF THE AXIS OF THE CIGARETTE, COVERS AN AREA NOT EXCEEDING ABOUT ONEHALF THE CROSS SECTION OF TH TOBACCO SUPPLY, AND NO LESS THAN ABOUT FOUR TIMES THE AREA OF SAID ORIFICE IN SAID WALL, SAID CYLINDRICAL OUTER SKIRT DEFINING A CHAMBER OF SUBSTANTIALLY LARGER SIZE WHICH SURROUNDS THE FIRST-MENTIONED CHAMBER, AND WHICH IS BOUNDED ON THE UPSTREAM END THEREOF BY SAID ANNULAR WEB WHICH IS ABUTTED AGAINST THE FIRST FILTER SECTION TO CLOSE OFF A PORTION OF THE END THEREOF.