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(11)

EP 3 694 659 A1

(12)

(43) Date of publication: 19.08.2020 Bulletin 2020/34 (21) Application number: 18796138.8 (22) Date of filing: 10.10.2018

(51) International Patent Classification (IPC):  B21K 1/76(2006.01) (86) International application number: PCT/JP2018/037807 (87) International publication number: WO 2019/074022 (18.04.2019 Gazette 2019/16)

(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: 10.10.2017 JP 2017196921 (71) Applicant: Neturen Co., Ltd. Tokyo 141-8639 (JP)	(72) Inventor: AOKI Kenichi Tokyo 141-8639 (JP) (74) Representative: Zimmermann & Partner Patentanwälte mbB  Postfach 330 920 80069 München 80069 München (DE)