British-american Tobacco Company Limited

British American Tobacco (investments) Limited

John Lawson Beven

Colin Campbell Greig

Paul David Case

David John Dittrich

Kevin Gerard McAdam

Rosemary Elizabeth O'Reilly

Martin Coleman

Richard Geoffrey Hook

Peter R White

The invention relates to a smoking article ( ) having a high proportion of non-combustible, inorganic material and a relatively low level of visible sidestream. The smoking article includes a substantially non-combustible, wrapper ( ) which extends along the full length of the smoking material rod and enwraps a combustible fuel source ( ) and aerosol generator ( ), both of which extend substantially along the length of the smoking material rod. Various suitable fuel source systems and aerosol generating systems are described. The article has a visible burn line which advances along the article and produces an ash which can be removed by the smoker in the normal way.

Smoking article with non-combustible wrapper, combustible fuel source and aerosol generator

Smoking article with non-combustible wrapper, combustible fuel source

Tobacco smoke filtration material

An extruded filtration material which is degradable and comprises either a plastics material or an inorganic material having a melting point above the operating temperature, a polysaccharide expansion medium, a binder and water. These ingredients are fed to an extruder and subjected to an extrusion process which involves a pressure reduction, upon extrusion from the exit die, of up to about 70 bars so that swelling of the extrudate occurs to give a cellular structure. When exposed to the natural weather conditions, tobacco smoke filter elements comprising such material degrade without leaving a fused amalgamation of plastics or inorganic material.

Filtration materials

Growing community of inventors

Thurleston, United Kingdom

John Lawson Beven