FILTERS FOR SMOKING RODS

摘要

Filters for Smoking Rods A tipped smoking rod comprising a tobacco rod 2, a filter tip 1 adjacent one end of the tobacco rod which comprises a filter body 3 enclosed within plugwrap material 4, and a tipping overwrap 6 material around the filter tip and the said adjacent end of the tobacco rod, wherein both the plugwrap and the tipping overwrap each comprise a pattern of perforations 7,8 which are selected to give an area of overlap of perforations of at least 0.2mm2 which is substantially unaffected by the relative positions of the plugwrap and tipping overwrap.