Smoking article

US4391285A · kind A · utility

Assignee

• Philip Morris Inc. · US

Inventors

• George H. Burnett · Richmond, US
• Warren E. Claflin · Bon Air, US
• Harry V. Lanzillotti · Midlothian, US
• A. Clifton Lilly, Jr. · Midlothian, US
• John F. Nienow · Richmond, US
• Thomas S. Osdene · Richmond, US
• Alline R. Wayte · Richmond, US

Key dates

• Filing date: May 9, 1980
• Grant date: Jul 5, 1983
• Expiry date: May 9, 2000

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A24D1/14
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

Smoking articles comprising a high density, relatively low porosity coherent mass of combustible tobacco-containing material having at least one passage extending therethrough are disclosed. In a preferred embodiment the smoking article is a cylinder having at least one passage axially therethrough. The smoking article may further comprise a plug of ignitable material in passage blocking position at one end of the passage, said plug being such as to permit puff induced air flow therethrough. At least one additional plug may be similarly disposed at the opposite end of the passage or at an intermediate point in the passage. By adjusting the density, the surface area and/or the porosity of the mass available for combustion, the per puff delivery of tar by the smoking article upon combustion may be controlled.