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(11)    Patent No :    AP 1915   
(21)    Application No :    AP/P/2004/003057   
(22)    Filing Date :    11.12.2002   
(24)    Date of Grant &    10.11.2008   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
EP    01129382.6    18.12.2001

(84)    Designated State

GM    GH    KE    LS   MW  MZ   SL   SD   SZ
T Z    UG    ZM    ZW
 
(73) Applicant(s)

BRITISH AMERICAN TOBACCO (INVESTMENTS)  LIMITED,

Globe House, 1 Water Street, London WC2R  3LA,
United Kingdom

(72) Inventors

SCHLÜTER Adolf, Germany

GRZONKA Horst, Germany

(74) Representative

FISHER CORMACK & BOTHA
 

(51)  International  Classification   A24D 1/04 (2006.01)    A24D 3/02 (2006.01)
A24D 3/04 (2006.01)    A24D 3/10 (2006.01)


(54)    Title

Ventilated smoking article

(57)    Abstract

The invention concerns a smoking article filter plug (16) for a cigarette, the filter plug being cylindrical and having a plug wrap (18), grooves (20) being impressed into the plug wrap, and a tipping paper (22) for the attachment of the filter plug to the tobacco rod (12). Some grooves are axially extending with respect to the axis of the filter plug and are open on the side of the tobacco rod and extend continuously only over a part of the length of the filter plug. All grooves are covered by a ventilated tipping paper, which allows ventilating air into the axially extending grooves only. In addition the invention concerns the use of such a filter for the reduction of the CO/tar ratio as a function of the filter ventilation.

(56)    Documents Cited :    US 3 596 663 A   US 4 256 122 A

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