Smoking article filter

Details Smoking article filter Smoking article filter

A - Human Necessities

24

D

A24D 3/04 (2006.01)

Patent

CA 2742396

A filter for a smoking article comprises elongate body 4 of filter material 7 for filtering smoke, an inner wrapper comprising first and second regions 9, 10 of non-porous material around and spaced apart along the length the filter material 7 to define a gap 11 that acts as a ventilation zone, and an outer wrapper 13 of porous material overlying the inner wrapper such as to allow ventilation air to be drawn through the ventilation zone and pass into the filter material (a) through the porous third wrapper and (b) longitudinally between inner wrapper and the outer wrapper.

L'invention porte sur un filtre pour article à fumer, lequel filtre comprend un corps allongé (4) de matériau de filtre (7) destiné à filtrer la fumée, une enveloppe intérieure comprenant des première et seconde régions (9, 10) de matériau non poreux qui entourent le matériau de filtre (7) et sont espacées de celui-ci sur sa longueur afin de définir un espace (11) qui sert de zone de ventilation, et une enveloppe extérieure (13) de matériau poreux recouvrant l'enveloppe intérieure de façon à permettre à l'air de ventilation d'être aspiré dans la zone de ventilation et de passer dans le matériau de filtre (a) à travers la troisième enveloppe poreuse et (b) longitudinalement entre l'enveloppe intérieure et l'enveloppe extérieure.

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