(19)

(11)

EP 3 977 042 A1

(12)

(43) Date of publication: 06.04.2022 Bulletin 2022/14 (21) Application number: 20723779.3 (22) Date of filing: 07.05.2020

(51) International Patent Classification (IPC):  F42B 1/028(2006.01) F42B 1/036(2006.01) F42B 1/032(2006.01) F42B 33/06(2006.01) (52) Cooperative Patent Classification (CPC): F42B 12/10; F42B 1/02; F42B 33/062; F42B 1/028; F42B 1/032; F42B 1/036; F42B 33/06 (86) International application number: PCT/EP2020/062689 (87) International publication number: WO 2020/239383 (03.12.2020 Gazette 2020/49)

(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: 25.05.2019 GB 201907438 02.03.2020 GB 202002939 (71) Applicant: Alford IP Limited Trowbridge, Wiltshire BA14 0XG (GB)	(72) Inventors: ALFORD, Roland Wiltshire BA14 6AB (GB) ALFORD. Sidney Wiltshire SNI3 OHX (GB) (74) Representative: Bryers LLP  Bristol & Bath Science Park Dirac Crescent, Emerson's Green Bristol, BS16 7FR Bristol, BS16 7FR (GB)