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(11)

EP 2 521 633 A1

(12)

(43) Date of publication: 14.11.2012 Bulletin 2012/46 (21) Application number: 11731708.1 (22) Date of filing: 05.01.2011

(51) International Patent Classification (IPC):  B24B 5/04(2006.01) D21G 9/00(2006.01) B24B 5/36(2006.01) B24B 49/04(2006.01) (86) International application number: PCT/FI2011/050005 (87) International publication number: WO 2011/083206 (14.07.2011 Gazette 2011/28)

(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 (30) Priority: 05.01.2010 FI 20105004 (71) Applicant: Wintech OY 40500 Jyväskylä (FI)	(72) Inventors: KOIRIKIVI, Kari FI-40200 Jyväskylä (FI) SYRJÄNEN, Teppo FI-33230 Tampere (FI) (74) Representative: Rahkonen, Erkki Juhani et al Tampereen Patenttitoimisto Oy Hermiankatu 1 B 33720 Tampere 33720 Tampere (FI)