Uniform tar delivery profile filter

Details Uniform tar delivery profile filter Uniform tar delivery profile filter

A - Human Necessities

24

D

A24D 1/04 (2006.01) A24D 3/00 (2006.01) A24D 3/04 (2006.01)

Patent

CA 2049573

A tobacco smoke filter element produces a more uniform tar delivery profile without an unacceptable pressure drop by causing the cigarette smoke to assume a progressively longer flow path through an outer cylinder of higher flow resistance filter tow material before passing radially inwardly through a cylinder of microfine fibres into a low resistance flow path to the smoker's mouth. The progressively increased flow path results from progressive clogging of the cylinder of microfine fibres by filtered material as smoking of the cigarette progresses.

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