Ventilated cigarette filter
AssigneeCigarette Components Limited
InventorErnest B. Hayes
Life of this patent
Estimating the term…
Abstract
A cigarette filter comprising longitudinally aligned core components a first of which is air-permeable and of relatively high pressure drop longitudinally of the filter but substantially air-impermeable radially of the filter and a second of which is air-permeable and of relatively low pressure drop longitudinally of the filter, and a common wrap or partial wrap which extends along and around or partially around said core components and provides for ventilation of the filter at a region longitudinally spaced from the first core component.
Claims8
A cigarette filter comprising a pair of longitudinally aligned core components, a first core component which is longitudinally air-permeable and has a relatively high pressure drop longitudinally of the filter and which is substantially air-impermeable radially of the filter across essentially the entire cross section thereof, a second core component which is air-permeable and has a lower pressure drop longitudinally of the filter than the first core component, an a common full or partial warp which extends along and at least partially around the pair of core components and provides for ventilation of the filter at a region longitudinally spaced from the first core component.
Dependencies are inferred from the claim text.