Ventilating sheath for smoking article

Details Ventilating sheath for smoking article Ventilating sheath for smoking article

A - Human Necessities

24

D

A24D 3/04 (2006.01) A24F 13/04 (2006.01)

Patent

CA 2731232

A sheath for a smoking article, such as a filter cigarette, including an exterior sheath (5) that provides a ventilation structure which has a reduced possibility of occlusion, and which also prevents a reduction in filter efficacy when the strength of the draw on the smoking article by the consumer is increased, for example in order to overcome the effects of dilution of the smoke flow with ambient air. The sheath may be manufactured as an independent entity and then fitted to prefabricated smoking articles, or alternatively may be constructed as an integral part of the smoking article.

Linvention concerne une gaine pour un article à fumer, comme une cigarette à filtre, comprenant une gaine extérieure (5) qui assure une structure de ventilation ayant peu de risques docclusion et empêchant également une baisse de lefficacité du filtre lorsque le consommateur augmente la force de tirage exercée sur larticle à fumer, par exemple pour lutter contre les effets de dilution du flux de fumée dans lair ambiant. La gaine peut être fabriquée sous la forme dune entité indépendante et être ensuite ajoutée à des articles préfabriqués à fumer ou être construite en faisant intégralement partie de larticle à fumer.

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