| 摘要 |
<p>A method and apparatus provides a web of material that can be used to wrap the tobacco in the tobacco portion of a cigarette. The web of material has bands of add-on material across the web, with the bands of add-on material having a different permeability to air than the remainder of the web. The bands of add-on material have a gradient in thickness (A), and therefore permeability, across the width of each band. The banded web can be embodied in cigarette paper used to wrap the tobacco in the tobacco rod portion of a cigarette.</p> |
