(19)

(11)

EP 4 136 038 A1

(12)

(43) Date of publication: 22.02.2023 Bulletin 2023/08 (21) Application number: 21725616.3 (22) Date of filing: 16.04.2021

(51) International Patent Classification (IPC):  B65D 71/50(2006.01) B65D 71/40(2006.01) (52) Cooperative Patent Classification (CPC): B65D 71/506; B65D 71/403; B65D 2571/0029 (86) International application number: PCT/US2021/027729 (87) International publication number: WO 2021/211998 (21.10.2021 Gazette 2021/42)

(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: 17.04.2020 US 202063011528 P 19.03.2021 US 202163163384 P (71) Applicant: WestRock Packaging Systems, LLC Atlanta GA 30328 (US)	(72) Inventors: CHESNET, Lauren N. Henrico, Virginia 23220 (US) SUZUKI, Tsughiko Henrico, Virginia 23233 (US) DA COSTA KOHLER, Adriano 78990 Elancourt (FR) (74) Representative: Rule, John Eric et al Coulson & Rule 13 Whitehall Road Rugby, Warwickshire CV21 3AE Rugby, Warwickshire CV21 3AE (GB)