Concentric core filter
AssigneeCigarette Components Limited
InventorsRichard Karl James Shepherd, John Charlton, Paul Francis Clarke
Life of this patent
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Abstract
A ventilated cigarette filter having a tobacco smoke filtering core, a tubular body of air-permeable material around the core, and an outer wrapper engaged around the tubular body and providing in use for the lateral ingress of external air therethrough into the tubular body, the core comprising a plurality of longitudinally aligned plugs of which one is an unwrapped buccal end plug of material which is the same as or similar to that of the surrounding tubular body so as to give a substantially uniform or integral buccal end appearance.
Claims20
A ventilated cigarette filter for attachment to one end of a tobacco rod such that one end of said filter is visible, said filter comprising:
- a tobacco smoke filtering core comprising a plurality of longitudinally aligned plugs;
- a tubular body of air permeable material disposed about said core;
- an outer wrapper disposed about said tubular body configured to permit flow of external air therethrough and into said tubular body;
- a first one of said plugs being unwrapped and together with said tubular body defining said one visible end of said filter, said first plug being of a material similar to said material of said tubular body to provide a substantially uniform appearance to said one visible end of said filter;
- and
- a second one of said plugs being disposed axially adjacent said first plug and being of a material different in filtering capability than said material of said first plug.
A ventilated cigarette filter for attachment to one end of a tobacco rod such that one end of said filter is visible, said filter comprising:
- a tobacco smoke filtering core comprising a plurality of longitudinally aligned plugs;
- a tubular body of air permeable material disposed about said core;
- a first one of said plugs being unwrapped and together with said tubular body defining said one visible end of said filter, said first plug being of a material similar to said material of said tubular body to provide a substantially uniform and integral appearance to said one visible end of said filter;
- and
- a second one of said plugs being disposed axially adjacent said first plug and being of a material different in filtering capability or pressure drop than said material of said first plug.
A cigarette comprising:
- a tobacco rod;
- a filter attached to one end of said tobacco rod such that one end of said filter is visible, said filter comprising:
- a tobacco smoke filtering core comprising a plurality of longitudinally aligned plugs;
- and
- a tubular body of air permeable material disposed about said core;
- an outer wrapper disposed about said filter and said tobacco rod configured to permit flow of external air therethrough and into said tubular body of said filter;
- a first one of said plugs being unwrapped and together with said tubular body defining said visible end of said filter, said first plug being of a material similar to said material of said tubular body to provide a substantially uniform appearance to said one visible end of said filter;
- and
- a second one of said plugs being disposed axially adjacent said first plug and being of a material different in filtering capability than said material of said first plug.
Dependencies are inferred from the claim text.