Smoking articles
AssigneeBrown & Williamson Tobacco Corporation
InventorsRichard Roland Baker, Sydney James Green, Keith Douglas Kilburn
Life of this patent
Estimating the term…
Abstract
A smoking article has a paper wrapper provided with alternate bands, encircling the article, of low and higher porosity, the low porosity being within the range of from 0 to 100 and the higher porosity in the range of from 150 to 2000, while the average porosity is, suitably, in the range of from 50 to 500. Advantageously, the ratio of the width of the bands of low porosity to that of the bands of higher porosity is at least 1 to 1. The width of the bands of low porosity may be within the range of from 1.0 to 3.0 mm and that of the bands of higher porosity within the range of from 0.1 to 3.0 mm.
Claims6
A smoking article with a reduced smoldering rate having a wrapper of paper provided with a series of narrow, encircling bands of low paper porosity alternated along the length of the article with bands of higher paper porosity, said low porosity bands being from 1.0 to 3.0 mm in width and having a paper porosity within the range of 0 to 100 and said higher porosity bands being from 0.1 to 3.0 mm in width and having a paper porosity within the range from 150 to 2,000 in order to be able to control the burn rate and increase the puff number.
Dependencies are inferred from the claim text.