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US 10,925,311 B2Granted
Smoking article including flow restrictor
AssigneePhilip Morris Products S.A.
InventorsLeonardo Nappi, Clement Besso
Life of this patent
Estimating the term…
Abstract
There is provided a filter for a smoking article, the filter including a filter segment of filter material and a flow restrictor. The flow restrictor is embedded in the filter segment and surrounded on all sides by the filter material. A cross sectional dimension of the flow restrictor measured perpendicular to a longitudinal direction of the filter is between about 60% and about 95% of the diameter of the filter segment. There is also provided a smoking article including such a filter.
Claims12
A filter for a smoking article, the filter comprising:
- a filter segment of filter material, the filter segment having a diameter measured perpendicular to a longitudinal direction of the filter;
- and
- a flow restrictor embedded in the filter segment and surrounded on all sides by the filter material,
- wherein the flow restrictor is solid, a cross sectional dimension of the flow restrictor measured perpendicular to a longitudinal direction of the filter is between about 60% and about 95% of the diameter of the filter segment, and wherein the flow restrictor is substantially spherical, the cross sectional dimension of the flow restrictor measured perpendicular to the longitudinal direction of the filter being a diameter of the flow restrictor, and
- wherein the flow restrictor has a compressive strength at a deformation of 10% greater than about 50.0 kPa.
2 more elements
Dependencies are inferred from the claim text.