Cigarette filter
AssigneeR. J. Reynolds Tobacco Company
InventorsJeffery S. Gentry, Karen M. Womble, Chandra K. Banerjee, Richard L. Blakley, Russell D. Barnes, Donald A. Calleson, Henry T. Ridings
Life of this patent
Estimating the term…
Abstract
A cigarette includes a filter element including a carbon-containing paper or a paper containing molecular sieves. The paper contacts the filter material, such as cellulose acetate tow, within the filter element, either by circumscribing the filter material or by being gathered with non-carbon-containing filter material. The paper is useful as a plug wrap for a filter element. In several embodiments, longitudinal grooves are provided on the periphery of the filter element.
Claims19
A cigarette having a charge of smokable material including tobacco cut filler wrapped in a circumscribing wrapping material to form a smokable rod;
- the cigarette comprising a filter element positioned adjacent one end of the smokable rod;
- the filter element including filter material having a plurality of longitudinal grooves therein and circumscribed by a carbon-containing paper material.
A cigarette having a charge of smokable material including tobacco cut filler wrapped in a circumscribing wrapping material to form a smokable rod;
- the cigarette comprising a filter element positioned adjacent one end of the smokable rod;
- the filter element including a carbon-containing paper material randomly gathered with a web of filter material different from said carbon-containing paper material and from said smokable material, thereby forming randomly oriented flow paths having carbon-containing paper therein.
A cigarette having a charge of smokable material including tobacco cut filler wrapped in a circumscribing wrapping material to form a smokable rod;
- the cigarette comprising a filter element positioned adjacent one end of the smokable rod;
- the filter element including filter material circumscribed by a molecular sieve-containing paper material.
A cigarette having a charge of smokable material including tobacco cut filler wrapped in a circumscribing wrapping material to form a smokable rod;
- the cigarette comprising a filter element positioned adjacent one end of the smokable rod;
- the filter element including filter material having a plurality of longitudinal grooves therein and circumscribed by a molecular sieve-containing paper material.
A cigarette having a charge of smokable material including tobacco cut filler wrapped in a circumscribing wrapping material to form a smokable rod;
- the cigarette comprising a filter element positioned adjacent one end of the smokable rod, said filter element having a circumferential periphery;
- the filter element including filter material having a plurality of longitudinal grooves therein and located around said periphery and circumscribed by a carbon-containing paper material.
A cigarette having a charge of smokable material including tobacco cut filler wrapped in a circumscribing wrapping material to form a smokable rod;
- the cigarette comprising a filter element positioned adjacent one end of the smokable rod and having a cross-section;
- the filter element including a carbon-containing paper material randomly gathered with a web of filter material different from said carbon-containing paper material and from said smokable material, thereby forming randomly oriented flow paths disposed throughout the cross-section of the filter element and having carbon-containing paper therein.
Dependencies are inferred from the claim text.