US 12,225,929 B2
Elongated smoking article
Mido Elmy, Hamburg (DE)
Assigned to IMPERIAL TOBACCO VENTURES LIMITED, Bristol (GB)
Appl. No. 17/427,071
Filed by IMPERIAL TOBACCO VENTURES LIMITED, Bristol (GB)
PCT Filed Jan. 29, 2020, PCT No. PCT/EP2020/052077
§ 371(c)(1), (2) Date Jul. 29, 2021,
PCT Pub. No. WO2020/157084, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 19155030 (EP), filed on Feb. 1, 2019.
Prior Publication US 2022/0095672 A1, Mar. 31, 2022
Int. Cl. A24D 3/04 (2006.01); A24D 1/20 (2020.01); A24D 3/06 (2006.01); A24D 3/16 (2006.01)
CPC A24D 3/048 (2013.01) [A24D 1/20 (2020.01); A24D 3/067 (2013.01); A24D 3/16 (2013.01)] 14 Claims
OG exemplary drawing
 
1. Elongated smoking article (100) extending in a longitudinal direction (L), comprising:
a cylindrical smoking body (10) with a heatable tobacco material (11);
a cylindrical filter element (20) aligned with the smoking body (10) in the longitudinal direction (L) and having at least one filter portion (30) and at least one hollow section (40); and
at least one paper (50) circumscribing the smoking body (10) and the filter element (20) for attaching the smoking body (10) and the filter element (20);
wherein the at least one hollow section (40) is disposed between the smoking body (10) and at least one of the at least one filter portion (30);
wherein there is no space between the filter portion (30) and the hollow section (40);
wherein the at least one filter portion (30) comprises a material configured to reduce unwanted substances from an aerosol drawn through the filter element (20) from the heated smoking body (10),
wherein at least one hollow section (40) has a barrier layer (51) disposed on its inner surface (41) and a carrier layer (52) disposed on the barrier layer (51), and
wherein the carrier layer (52) contains a volatile additive (80) and the barrier layer (51) prevents migration of the volatile additive (80) to an exterior of the hollow section (40).