SMOKING ARTICLE WITH IMPROVED FLOW RESTRICTION ELEMENT
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United States of America Patent
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N/A
Issued Date -
Nov 18, 2010
app pub date -
May 18, 2010
filing date -
May 18, 2009
priority date (Note) -
Abandoned
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Abstract
A smoking article includes a rod of smokable material and a filter including a flow restriction element attached to the rod of smokable material. The flow restriction element includes a first upstream integral tubular portion, a second downstream integral tubular portion of substantially the same external diameter as the first tubular portion, and a third central integral tubular portion located between the first and second tubular portions. The third tubular portion is of reduced external diameter compared to the first and second tubular portions. A transverse barrier having at least one orifice therein is disposed between a first upstream cavity at least partially defined by an inner periphery of the first tubular portion and a second downstream cavity at least partially defined by an inner periphery of the second tubular portion. A ventilation zone in communication with the second cavity is also provided at a location along the filter.
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