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(11)

EP 3 955 757 A1

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(43) Date of publication: 23.02.2022 Bulletin 2022/08 (21) Application number: 21802179.8 (22) Date of filing: 18.05.2021

(51) International Patent Classification (IPC):  A24F 40/30(2020.01) A24F 40/50(2020.01) A24F 40/485(2020.01) A24F 40/42(2020.01) A24F 40/51(2020.01) A24F 40/60(2020.01) (52) Cooperative Patent Classification (CPC): A24F 40/60; A24F 40/50; A24F 40/51; A24F 40/30; A24F 40/42; A24F 40/485 (86) International application number: PCT/KR2021/006213 (87) International publication number: WO 2021/241932 (02.12.2021 Gazette 2021/48)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 25.05.2020 KR 20200062315 (71) Applicant: KT&G Corporation Daedeok-gu Daejeon 34337 (KR)	(72) Inventors: LEE, Jong Sub Seongnam-si Gyeonggi-do 13496 (KR) KIM, Min Kyu Seoul 08211 (KR) LEE, Won Kyeong Guri-si Gyeonggi-do 11920 (KR) CHO, Byung Sung Gwangmyeong-si Gyeonggi-do 14241 (KR) (74) Representative: Ter Meer Steinmeister & Partner  Patentanwälte mbB Nymphenburger Straße 4 80335 München 80335 München (DE)