Filter and method for making a filter for a cigarette

Details Filter and method for making a filter for a cigarette Filter and method for making a filter for a cigarette

A - Human Necessities

24

D

A24D 3/04 (2006.01)

Patent

CA 2694141

A filter (1) for a cigarette comprises a porous filter rod (2) and an inner porous material sheet (3) wrapped around the filter rod. The inner porous material sheet is shaped to provide a plurality of grooves extending parallel to the rod axis. The grooves have a circumferential distribution around the filter rod such that there are at least two regions of the circumference which are free from the grooves. The filter also comprises an outer material sheet (4) wrapped around the inner porous material sheet.

L'invention concerne un filtre (1) pour cigarette qui comprend une tige de filtre poreuse (2) et une feuille interne de matériau poreux (3) enroulée autour de la tige de filtre. La feuille interne de matériau poreux est façonnée de façon à obtenir une pluralité de sillons s'étendant parallèlement à l'axe de la tige. Les sillons sont distribués sur la circonférence de la tige de filtre de telle sorte qu'au moins deux régions de la circonférence soient dépourvues de sillons. Le filtre comprend également une feuille externe de matériau (4) enroulée autour de la feuille interne de matériau poreux.

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