(19)

(11)

EP 3 568 496 A1

(12)

(43) Date of publication: 20.11.2019 Bulletin 2019/47 (21) Application number: 17835579.8 (22) Date of filing: 11.12.2017

(51) International Patent Classification (IPC):  C14B 11/00(2006.01) A43D 8/42(2006.01) A43D 95/06(2006.01) (86) International application number: PCT/BG2017/000032 (87) International publication number: WO 2018/129597 (19.07.2018 Gazette 2018/29)

(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: MA MD TN (30) Priority: 13.01.2017 BG 11243817 (71) Applicant: Prolet Ltd. 6400 Dimitrovgrad (BG)	(72) Inventors: TZONEV, Plamen, Dimitrov 1434 Sofia (BG) BORISOV, Lyubomir, Todorov Gabrovo 5300 (BG) ROYDEV, Miroslav, Dinchev Galabovo 6280 (BG) (74) Representative: Georgieva, Lilia Tzvetkova  Kv. Gorublyane Pavel Krasov Str. 6 1138 Sofia 1138 Sofia (BG)