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AssigneePhilip Morris USA Inc.
InventorsLixin Xue, Jose G. Nepomuceno, Shuzhong Zhuang, Timothy Scott Sherwood, John Bryant Paine III, Jay A. Fournier, Charles Edwin Thomas JR., Kent Brian Koller, Liqun Yu
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A cigarette filter for removing gas phase constituents from mainstream cigarette smoke as the smoke is drawn through the filter primarily comprises an activated carbon fiber filter section including a bundle of activated carbon fibers. Particulate adsorbent materials such as granules, beads or course powders may be dispersed amongst the activated carbon fibers to aid in removal of the gas phase constituents. Additionally, the activated carbon fiber filter section may be used in combination with a separate bed or beds of particulate adsorbent material. In one embodiment, the activated carbon fibers are positioned within a helical groove on the outside of a threaded rod within the activated carbon fiber filter section. Relatively smaller amounts of activated carbon fibers produce the same smoke constituent reduction as larger amounts of particulate adsorbent material.
A cigarette filter for removing gas phase constituents from mainstream cigarette smoke as the smoke is drawn through the filter, the filter including an activated carbon fiber filter section containing a bundle of activated carbon fibers substantially aligned with one another and having a common direction.
A cigarette comprising a tobacco rod and a downstream filter for removing gas phase constituents from mainstream tobacco smoke as the smoke is drawn through the filter, the filter including an activated carbon fiber filter section containing a bundle of activated carbon fibers substantially aligned with one another in the same direction as the flow of tobacco smoke through the filter.
Dependencies are inferred from the claim text.