(19)
(11) EP 4 770 841 A1

(12)

(43) Date of publication:
08.07.2026 Bulletin 2026/28

(21) Application number: 24769263.5

(22) Date of filing: 27.08.2024
(51) International Patent Classification (IPC): 
B29C 31/08(2006.01)
B29D 99/00(2010.01)
 B29C 70/54(2006.01)
B29L 31/08(2006.01)
(52) Cooperative Patent Classification (CPC):
B29L 2031/085; B29D 99/0028; B29C 31/085; B29C 70/541; Y02P 70/50
(86) International application number:
PCT/DK2024/050199
(87) International publication number:
WO 2025/045322 (06.03.2025 Gazette 2025/10)
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 31.08.2023 DK PA202370451

(71) Applicant: VESTAS WIND SYSTEMS A/S
8200 Aarhus N (DK)

(72) Inventors:
  • PRESTON, Robert Charles
    8200 Aarhus N (DK)
  • MARASHI, Houriyeh
    8200 Aarhus N (DK)
  • PETERSEN, Leif
    8200 Aarhus N (DK)

(74) Representative: Vestas Patents Department 
Hedeager 42
8200 Aarhus N
8200 Aarhus N (DK)

   


(54) METHOD OF MAKING A WIND TURBINE BLADE HAVING A FLATBACK PREFORM AND SYSTEM FOR MAKING SAME