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EP 4 322 780 A1

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(43) Date of publication: 21.02.2024 Bulletin 2024/08 (21) Application number: 23801663.8 (22) Date of filing: 13.06.2023

(51) International Patent Classification (IPC):  A24F 40/46(2020.01) H05B 3/10(2006.01) A24F 40/30(2020.01) A24F 40/20(2020.01) H05B 3/34(2006.01) A24F 40/70(2020.01) A24F 40/10(2020.01) (52) Cooperative Patent Classification (CPC): A24F 40/20; A24F 40/46; A24F 40/70; H05B 3/10; H05B 3/34 (86) International application number: PCT/KR2023/008115 (87) International publication number: WO 2023/243990 (21.12.2023 Gazette 2023/51)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 17.06.2022 KR 20220074196 21.10.2022 KR 20220136834 (71) Applicant: KT&G Corporation Daedeok-guDaejeon 34337 (KR)	(72) Inventors: KIM, Tae Hun Yongin-si, Gyeonggi-do 16925 (KR) PARK, Ju Eon Seongnam-si, Gyeonggi-do 13597 (KR) YOON, Sung Wook Suwon-si, Gyeonggi-do 16534 (KR) JUNG, Hyung Jin Seoul 06993 (KR) HAN, Jung Ho Daejeon 34021 (KR) (74) Representative: Ter Meer Steinmeister & Partner  Patentanwälte mbB Nymphenburger Straße 4 80335 München 80335 München (DE)