Abstract: A cigarette wrapping paper includes a plurality of rows of perforations extending across the width of the paper wherein the rows of perforations are spaced at preselected distances along the entire length of the paper.

Abstract: A filter for a cigarette includes a porous filter rod having a capillary smoke passageway extending coaxially therethrough. The filter rod is circumscribed by a non-porous wrapper and the filter rod with the non-porous wrapper therearound is provided with at least one groove extending from one end thereof a preselected distance longitudinally therealong. The groove preferably extends from the mouth end of the filter rod. Tipping material circumscribes the non-porous wrapper and is provided with flow-through openings therein in flow communication with the groove. In one embodiment, the filter rod includes a cylindrical collar coaxially located at the mouth end defining a recess, the thickness of the wall of the collar being less than the depth of the groove. In a further embodiment, the filter collar includes a concentric open core member coaxial with and open to the capillary flow passageway with the area between the core member and collar wall being open to the groove.

Abstract: A filter for a cigarette includes a porous filter rod circumscribed by a non-porous wrapper provided with at least one groove embedded into the periphery of the filter rod extending from the mouth end thereof a preselected distance longitudinally therealong less than the entire length of the filter rod. Tipping material circumscribes the non-porous wrapper and is provided with flow-through openings therein in flow communication with the groove. The tipping material extends beyond the mouth end thereof defining a recess, and the filter rod includes a cylindrical collar coaxially located in the recess concentrically with the portion of the tipping material extending beyond the filter rod mouth end. The thickness of the wall of the collar is less than the depth of the groove which collar functions as a baffle to accelerate the velocity of the air leaving the groove.

Abstract: A filter for a cigarette includes a porous filter rod having a capillary smoke passageway extending coaxially therethrough. The filter rod is circumscribed by a non-porous wrapper and the filter rod with the non-porous wrapper therearound is provided with at least one groove extending from one end thereof a preselected distance longitudinally therealong. The groove preferably extends from the mouth end of the filter rod. Tipping material circumscribes the non-porous wrapper and is provided with flow-through openings therein in flow communication with the groove. In one embodiment, the filter rod includes a cylindrical collar coaxially located at the mouth end defining a recess, the thickness of the wall of the collar being less than the depth of the groove. In a further embodiment, the filter collar includes a concentric open core member coaxial with and open to the capillary flow passageway with the area between the core member and collar wall being open to the groove.