Smoking article filter

摘要

A filter for a smoking article comprises elongate body 4 of filter material 7 for filtering smoke, an inner wrapper comprising first and second regions 9, 10 of non-porous material around and spaced apart along the length the filter material 7 to define a gap 11 that acts as a ventilation zone, and an outer wrapper 13 of porous material overlying the inner wrapper such as to allow ventilation air to be drawn through the ventilation zone and pass into the filter material (a) through the porous third wrapper and (b) longitudinally between inner wrapper and the outer wrapper.

主权项

1. A filter for a smoking article, comprising:
an elongate body of filter material; an inner wrapper comprising first and second regions of non-porous material around and spaced apart along the length of the filter material to define a gap that acts as a ventilation zone; and an outer wrapper overlying the inner wrapper that allows ventilation air to be drawn through the ventilation zone and pass into the filter material through the outer wrapper and longitudinally between the inner wrapper and the outer wrapper.