Activated carbon fiber cigarette filter

A - Human Necessities – 24 – D

Patent

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Details

A24D 3/04 (2006.01) A24D 3/16 (2006.01)

Patent

CA 2481381

A cigarette filter (14) for removing gas phase constituents from mainstream cigarette smoke as the smoke is drawn through the filter (14), primarily comprises an activated carbon fiber filter section (16) including a bundle of activated carbon fibers (24). Particulate adsorbent materials such as granules, beads or course powders (42) may be dispersed amongst the activated carbon fibers (24) to aid in removal of the gas phase constituents. Additionally, the activated carbon fiber filter section (16) may be used in combination with a separate bed or beds of particulate adsorbent material (42). In one embodiment, the activated carbon fibers (24) are positioned within a helical groove (116) on the outside of a threaded rod (114) within the activated carbon fiber filter section (16). Relatively smaller amounts of activated carbon fibers (24) produce the same smoke constituent reduction as larger amounts of particulate adsorbent material (42).

L'invention concerne un filtre à cigarettes (14) destiné à éliminer les constituants de phase gazeuse de la fumée de cigarettes principale, lorsque la fumée passe à travers le filtre . Ledit filtre comprend une partie filtre (16) en fibres de carbone notamment un fagot de fibres de carbone (24). Des matières absorbantes de particules telles que des granules, des perles ou des poudres grossières (42) peuvent être dispersées parmi les fibres de carbone (24) activées, ceci permettant d'éliminer les constituants de la phase gazeuse. De plus, ladite partie filtre (16) en fibres de carbone activées peut être utilisée en association avec un ou des lits séparés de matières (42) absorbant les particules. Dans un mode de réalisation, lesdites fibres de carbone (24) activées sont disposées à l'intérieur d'une rainure hélicoïdale (116) sur l'extérieur d'un bâtonnet fileté (114), ce dernier étant positionné à l'intérieur de la partie filtre (16) en fibres de carbone activées. Des quantités relativement petites de fibres de carbone (24) activées produisent la même réduction de constituants de fumée que de grandes quantités de matière (42) absorbant les particules.

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