Cigarette filter

Details Cigarette filter Cigarette filter

A - Human Necessities

24

D

131/17

A24D 3/04 (2006.01)

Patent

CA 1166923

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 hollow tube therein extending from one end a preselected distance, the filter rod being circumscribed by a non-porous wrapper wherein 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 and the tube may extend from the same one end or may extend from opposite ends. Tipping material circumscribes the non-porous wrapper and is provided with flow-through openings therein in flow communication with the groove. The groove may be oriented to extend to the mouth end of the filter or the tobacco end when connected to a cigarette.

392853

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