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US 9,066,542 B2Granted
Filter for a smoking article
AssigneeBritish American Tobacco (Investments) Limited
InventorRichard Fiebelkorn
Life of this patent
Estimating the term…
Abstract
A multi-section filter (5) for a smoking article comprises at least a first (5B) and a second filter section (5A). The first filter section (5B) is at a mouth end of the filter (5) and the second filter section includes a set of ventilation holes (17) and a set of grooves (7). The grooves (7) extend from respective ventilation holes (17) along the second filter section (5A) up to but not into the first filter section (5B).
Claims27
A smoking article, comprising:
- a tobacco rod and a multi-section filter combined via a tipping paper having ventilation holes, the multi-section filter including:
- a first filter section disposed at a mouth end of the filter;
- and
- a second filter section adjacent to the first filter section, the second filter section including a set of grooves,
- wherein the grooves extend from some but not all of the ventilation holes in the tipping paper along the second filter section towards the first filter section, and
- wherein the filter further includes a non-permeable barrier at a distal end of the grooves opposite from the first filter section, such that, in use, the barrier prevents smoke from being drawn into the grooves and facilitates air flow into the grooves via the ventilation holes.
3 more elements
A method of making a smoking article, comprising:
- combining a grooved filter section and a mouth-end filter section of a multi-section filter by overlaying the grooved filter section with a permeable plug-wrap, the grooved filter section including a set of grooves extending along the grooved filter section towards the mouth-end filter section;
- and
- overlaying the combined grooved and mouth-end filter sections with a tipping paper containing ventilation holes such that, the position of some but not all of the ventilation holes corresponds to the position of the grooves, wherein the grooves are blocked by a non-permeable barrier at an end of the grooves opposite to the mouth-end filter section during the combining.
A smoking article, comprising:
- a tobacco rod, a multi-section filter, and a tipping paper, the tipping paper joining the tobacco rod and the multi-section filter and having ventilation holes, the multi-section filter including:
- a first filter section disposed at a mouth end of the filter;
- a second filter section adjacent to the first filter section, the second filter section having a plurality of grooves extending from some of the ventilation holes in the tipping paper, along the second filter section towards the first filter section, and other of the ventilation holes configured to direct air into a body portion of the second filter section;
- and
- barrier material at an end of the grooves distal the first filter section, the barrier material configured to facilitate air flow into the grooves via the ventilation holes.
2 more elements
Dependencies are inferred from the claim text.