SMOKING ARTICLE WITH A RESTRICTOR

摘要

SMOKING ITEM WITH A RESTRICTOR. The present invention relates to a filter for smoking article (114) according to the invention includes a flow restrictor (126) and a cavity (146) downstream of the flow restrictor. The flow restrictor includes an orifice (130) or a flow channel to direct the smoke into the cavity. The filter is connected to a tobacco rod (112) with tip paper (116) and includes an air permissible ventilation zone (140) at a location downstream of the restrictor. The invention also provides smoking articles including filters comprising restrictors and methods of making filters and smoking articles.