(19)

(11)

EP 4 492 994 A1

(12)

(43) Date of publication: 22.01.2025 Bulletin 2025/04 (21) Application number: 23770992.8 (22) Date of filing: 23.02.2023

(51) International Patent Classification (IPC):  A24B 15/12(2006.01) A24B 13/02(2006.01) A24B 15/14(2006.01) A24D 3/02(2006.01) A24D 1/04(2006.01) A24D 1/20(2020.01) A24D 1/00(2020.01) A24B 15/18(2006.01) A24D 3/04(2006.01) (52) Cooperative Patent Classification (CPC): A24B 13/02; A24B 15/12; A24B 15/14; A24D 1/20; D21H 27/00; D21H 11/12; D21H 27/30; A24B 15/186; A24B 15/167 (86) International application number: PCT/KR2023/002625 (87) International publication number: WO 2023/177112 (21.09.2023 Gazette 2023/38)

(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: 14.03.2022 KR 20220031670 (71) Applicant: KT & G Corporation Daejeon 34337 (KR)	(72) Inventors: SEO, Jung Kyu Daejeon 34128 (KR) KIM, Youngjoong Daejeon 34128 (KR) LEE, Do Kyong Daejeon 34128 (KR) JUNG, Hee Tae Daejeon 34128 (KR) (74) Representative: Ter Meer Steinmeister & Partner  Patentanwälte mbB Nymphenburger Straße 4 80335 München 80335 München (DE)