Carbon heat source
AssigneePhilip Morris Incorporated
InventorsWilliam S. Nystrom, Leo C. Lanzel, Harry V. Lanzillotti, Charles R. Hayward, A. C. Lilly, Jr., John R. Hearn
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Abstract
A carbonaceous heat source for a smoking article is provided. The heat source is designed to maximize heat transfer to a flavor bed in the smoking article. The heat source undergoes substantially complete combustion leaving minimal residual ash, has a relatively low degree of thermal conductivity and ignites under normal lighting conditions for a conventional cigarette.
Claims68
A heat source for use in a smoking article having one or more longitudinal fluid passages therethrough wherein the geometric surface area of said fluid passages is at least about equal to the outside geometric surface area of said heat source.
A process for making a heat source for a smoking article comprising the steps of:
- (a) mixing charcoal particles derived from carbon-yielding precursors that have been carbonized in an oxidizing atmosphere with one or more additives;
- (b) extruding or molding said charcoal and additives into a desired shape;
- and
- (c) baking said extruded or molded charcoal and additives.
A carbon-containing heat source for use in a smoking article comprised of charcoal particles derived from carbon-yielding precursors that have been carbonized in an oxidizing atmosphere.
A carbon containing heat source for use in a smoking article having one or more longitudinal fluid passages therethrough formed in the shape of multi-pointed stars.
Dependencies are inferred from the claim text.