(19)

(11)

EP 3 639 626 A1

(12)

(43) Date of publication: 22.04.2020 Bulletin 2020/17 (21) Application number: 18816677.1 (22) Date of filing: 13.06.2018

(51) International Patent Classification (IPC):  H05B 33/08(2020.01) F21K 9/65(2016.01) F21V 13/00(2006.01) H01L 25/16(2006.01) H05K 1/18(2006.01) (86) International application number: PCT/FI2018/050453 (87) International publication number: WO 2018/229335 (20.12.2018 Gazette 2018/51)

(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: 13.06.2017 FI 20174157 U (71) Applicant: Flexbright Oy 90830 Haukipudas (FI)	(72) Inventor: MAKKONEN, Pekka 90830 Haukipudas (FI) (74) Representative: Kolster Oy Ab  Salmisaarenaukio 1 P.O. Box 204 00180 Helsinki 00180 Helsinki (FI)