Celanese Gmbh

Peter J Bohlander

Charles H Keith

Colin L Browne

A compound cigarette filter, the filter having the ability to deliver substantially constant tar and nicotine as the cigarette is smoked. The compound filter comprises a barrier positioned upstream and in abutting relationship with at least one filter segment, the barrier containing passageways permitting the passage of smoke from a tobacco column to the filter segment, the total cross-sectional passageway area being from 0.5 to 3 square millimeters, the compound filter having an initial totally encapsulated pressure drop of at least 90 mm. H.sub.2 O.

Compound filter

A process for preparing a compound cigarette filter, the filter having the ability to deliver substantially constant tar and nicotine as the cigarette is smoked. The compound filter comprises a barrier positioned upstream and in abutting relationship with at least one filter segment, the barrier containing passageways permitting the passage of smoke from a tobacco column to the filter segment, the total cross-sectional passageway area being from 0.5 to 3 square millimeters, the compound filter having an initial totally encapsulated pressure drop of at least 90 mm. H.sub.2 O.

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Charlotte, NC, United States of America

Peter J Bohlander