(19)

(11)

EP 3 946 899 A1

(12)

(43) Date of publication: 09.02.2022 Bulletin 2022/06 (21) Application number: 20716799.0 (22) Date of filing: 06.04.2020

(51) International Patent Classification (IPC):  B29C 64/153(2017.01) B29C 64/241(2017.01) B33Y 10/00(2015.01) B33Y 99/00(2015.01) B29C 64/176(2017.01) B29C 64/259(2017.01) B33Y 30/00(2015.01) B22F 3/105(2006.01) (52) Cooperative Patent Classification (CPC): B29C 64/153; B29C 64/176; B29C 64/241; B29C 64/259; B33Y 10/00; B33Y 30/00; B33Y 99/00; B22F 10/28; B22F 12/82; B22F 10/20; B22F 12/00; Y02P 10/25 (86) International application number: PCT/EP2020/059795 (87) International publication number: WO 2020/201581 (08.10.2020 Gazette 2020/41)

(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: 05.04.2019 GB 201904816 (71) Applicant: Additive Manufacturing Technologies Limited Sheffield Airport Business Park Sheffield S9 1XU (GB)	(72) Inventors: CRABTREE, Joseph Gwilliam Sheffield Airport Business Park Sheffield Yorkshire S9 1XU (GB) RYBALCENKO, Konstantin Sheffield Airport Business Park Sheffield Yorkshire S9 1XU (GB) PAP-KOVÁCS, Viktor Sheffield Airport Business Park Sheffield Yorkshire S9 1XU (GB) (74) Representative: McWilliams, David John  Withers & Rogers LLP 2 London Bridge London SE1 9RA London SE1 9RA (GB)