Title: Microperforated filter tip cigarette

Abstract: An improved ventilated filter tip cigarette is provided utilizing a unique combination of porous filter plug wrap having a porosity of from about 300 to 4000 Filtrona air permeability units with a microperforated tipping envelope having perforations averaging less than about 0.01 mm.sup.2 each in open area. The relationship of plug wrap porosity combined with the size of microperforations in the tipping envelope provide cigarettes with maximum selective reductions in carbon monoxide yields and only minor reductions in nicotine yields as compared to constituent yields heretofore obtained in the smoke from ventilated cigarettes.

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Inventors: Martin, Richard H. (Pisgah Forest, NC, US)
Owens, Jr., William F. (Pisgah Forest, NC, US)

Application Number: 811046
Filing Date: 1977-06-29
Publication_date: 1979-11-20
Assignee: Olin Corporation (Pisgah Forest, NC)
Primary Class(es): 131/336
Other Classes:
US Patent Ref:

3805800	Apr, 1974	Summers	131/10.
4094324	Jun, 1978	Bolsinger et al.	131/10.

Other Refs: 2206663

Jun, 1974	FR

Primary Examiner: Millin, V.
Assistant Examiner:
Attorney: Habel; Robert W.