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(11)

EP 4 356 055 A2

(12)

(88) Date of publication A3: 16.03.2023 (43) Date of publication: 24.04.2024 Bulletin 2024/17 (21) Application number: 22754318.8 (22) Date of filing: 15.07.2022

(51) International Patent Classification (IPC):  F26B 3/06(2006.01) F26B 21/02(2006.01) F26B 13/16(2006.01) F26B 25/16(2006.01) (52) Cooperative Patent Classification (CPC): F26B 3/06; F26B 13/16; F26B 21/12; F26B 21/022 (86) International application number: PCT/EP2022/069911 (87) International publication number: WO 2023/001712 (26.01.2023 Gazette 2023/04)

(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: 22.07.2021 US 202163224558 P 20.05.2022 US 202217749745 (71) Applicant: VALMET AB 851 94 Sundsvall (SE)	(72) Inventors: GERRY, JR., Stanley M. Gray, ME 04039 (US) SKAWSKI, Jan Portland, ME 04101 (US) STAPLES, Douglas B. Biddeford, ME 04005 (US) (74) Representative: Graham Watt & Co LLP  St. Botolph's House 7-9 St. Botolph's Road Sevenoaks TN13 3AJ Sevenoaks TN13 3AJ (GB)