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(11)

EP 3 762 531 A1

(12)

(43) Date of publication: 13.01.2021 Bulletin 2021/02 (21) Application number: 18710433.6 (22) Date of filing: 08.03.2018

(51) International Patent Classification (IPC):  D06F 39/12(2006.01) D06F 37/22(2006.01) (86) International application number: PCT/EP2018/055719 (87) International publication number: WO 2019/170236 (12.09.2019 Gazette 2019/37)

(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 (71) Applicant: V-Zug AG 6300 Zug (CH)	(72) Inventors: SIBAK, Martin 6006 Luzern (CH) SCHERF, Gunter 5605 Dottikon (CH) (74) Representative: E. Blum & Co. AG  Patent- und Markenanwälte VSP Vorderberg 11 8044 Zürich 8044 Zürich (CH)