US 12,167,745 B2
Cigarette
Jung Seop Hwang, Daejeon (KR); John Tae Lee, Daejeon (KR); Bong Su Cheong, Daejeon (KR); Sung Jong Ki, Daejeon (KR); and Yong Sook Jin, Daejeon (KR)
Assigned to KT&G CORPORATION, Daejeon (KR)
Appl. No. 17/050,987
Filed by KT&G CORPORATION, Daejeon (KR)
PCT Filed Jul. 2, 2019, PCT No. PCT/KR2019/008027
§ 371(c)(1), (2) Date Oct. 27, 2020,
PCT Pub. No. WO2020/009416, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. 10-2018-0078299 (KR), filed on Jul. 5, 2018.
Prior Publication US 2021/0227876 A1, Jul. 29, 2021
Int. Cl. A24D 1/04 (2006.01); A24D 1/18 (2006.01); A24D 1/02 (2006.01); A24D 3/06 (2006.01)
CPC A24D 1/042 (2013.01) [A24D 1/18 (2013.01); A24D 1/02 (2013.01); A24D 3/063 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A cigarette comprising:
a tobacco rod;
a supporting segment positioned at a downstream end of the tobacco rod;
a cooling segment positioned at a downstream end of the supporting segment; and
a mouthpiece positioned at a downstream end of the cooling segment,
wherein the cooling segment includes a plurality of air channels formed along a longitudinal direction of the cigarette, and porosity of the cooling segment is less than 50%,
wherein the cooling segment includes a bundle of fibers arranged along the longitudinal direction of the cigarette, thereby forming the plurality of air channels, and
wherein the bundle of fibers comprises at least one sub-bundle of fibers which include straight fibers of a polymer material arranged along the longitudinal direction of the cigarette; or
the bundle of fibers comprises at least one sub-bundle of fibers which include crimped fibers of a polymer material arranged along the longitudinal direction of the cigarette; or
the bundle of fibers is comprised of fibers made of a polymer material and includes at least one sub-bundle of straight fibers arranged along the longitudinal direction and at least one sub-bundle of crimped fibers arranged along the longitudinal direction.