Smoking article with open ended filter and restrictor
Patent 8,235,057
A smoking article includes a tobacco rod adapted to produce mainstream smoke, and a filter having an upstream end and a downstream end, wherein the filter is arranged to receive mainstream smoke at the upstream end. The filter includes a tubular segment open at the downstream end thereof and a flow restrictor contained within the tubular segment. The filter is attached to the tobacco rod with tipping paper and includes an air-admissible ventilating zone at a location between the upstream end and the downstream end of the filter.
Inventors: San Li (Midlothian); Michael S. Braunshteyn (Richmond); Raquel M. Olegario (Chesterfield); Richard Jupe (Richmond); Martin Garthaffner (Chesterfield)
Assignee: Philip Morris USA Inc. (Richmond)
Aug. 7, 2012
