SMOKING ARTICLE INCLUDING FLOW RESTRICTOR IN HOLLOW TUBE

摘要

There is provided a smoking article comprising a filter. The filter comprises a hollow tube having an inner surface. The filter further comprises a flow restrictor disposed in the hollow tube, and adapted to divert at least a portion of the flow of mainstream smoke between an outer surface of the restrictor and the inner surface of the hollow tube. Furthermore, the filter comprises a retaining element disposed downstream of the flow restrictor, the retaining element having one or more openings. Each of the openings of the retaining element has at least one cross-sectional dimension that is smaller than the smallest cross-sectional dimension of the flow restrictor to prevent the flow restrictor from moving downstream of the retaining element. The flow restrictor is substantially spherical, at least one cross-sectional dimension of the one or more openings of the retaining element being smaller than the diameter of the flow restrictor.

主权项

1. A smoking article comprising:
a hollow tube having an inner surface; a flow restrictor disposed in the hollow tube, and adapted to divert the flow of mainstream smoke between an outer surface of the restrictor and the inner surface of the hollow tube; and a retaining element disposed downstream of the flow restrictor, the retaining element having one or more openings; wherein each of the one or more openings of the retaining element has at least one cross-sectional dimension that is smaller than the largest cross-sectional dimension of the flow restrictor to prevent the flow restrictor from moving downstream of the retaining element; and wherein the flow restrictor is substantially spherical, at least one cross-sectional dimension of the one or more openings of the retaining element being smaller than the diameter of the spherical flow restrictor.