Cigarette filter

Details Cigarette filter Cigarette filter

A - Human Necessities

24

D

131/17

A24D 3/00 (2006.01) A24D 3/04 (2006.01)

Patent

CA 1231021

UNITED STATES PATENT APPLICATION OF ROBERT A. SANFORD FOR IMPROVED CIGARETTE FILTER ABSTRACT OF THE DISCLOSURE A filter for a cigarette includes a porous filter rod having a capillary smoke passageway extending coaxially therethrough and a hollow, generally cylindrical mouthpiece coaxially located with the filter rod at the mouth end of the filter rod. The filter rod is circumscribed by a non-porous wrapper, and the filter rod with the non-porous wrapper therearound is provided with grooves extending from the mouth end thereof a preselected distance longitudinally therealong. The mouthpiece is formed with air flow channels in flow communication with the grooves of the filter rod, and smoke flow channels in flow communication with that area of the filter rod mouth end between adjacent grooves of the filter rod. Tipping material circumscribes the filter rod and the mouthpiece, and is provided with flow-through openings therein in flow communication with the grooves.

484215

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