(19)

(11)

EP 4 093 913 A1

(12)

(43) Date of publication: 30.11.2022 Bulletin 2022/48 (21) Application number: 21706412.0 (22) Date of filing: 13.01.2021

(51) International Patent Classification (IPC):  D21H 19/38(2006.01) D21H 19/82(2006.01) B65D 3/06(2006.01) D21H 19/68(2006.01) D21H 27/10(2006.01) (52) Cooperative Patent Classification (CPC): D21H 19/822; D21H 19/68; D21H 19/38; D21H 19/385; D21H 27/10; B65D 3/06; B65D 3/14 (86) International application number: PCT/US2021/013165 (87) International publication number: WO 2021/150404 (29.07.2021 Gazette 2021/30)

(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: 22.01.2020 US 202062964198 P (71) Applicant: WestRock MWV, LLC Atlanta, GA 30328 (US)	(72) Inventor: PANG, Jiebin Glen Allen, VA 23059 (US) (74) Representative: Coulson, Elizabeth Eve et al Coulson & Rule 13 Whitehall Road Rugby, Warwickshire CV21 3AE Rugby, Warwickshire CV21 3AE (GB)