(19)

(11)

EP 2 350 551 A1

(12)

(43) Date of publication: 03.08.2011 Bulletin 2011/31 (21) Application number: 09823132.7 (22) Date of filing: 28.10.2009

(51) International Patent Classification (IPC):  F41A 29/00(2006.01) F41A 13/04(2006.01) (86) International application number: PCT/FI2009/050864 (87) International publication number: WO 2010/049588 (06.05.2010 Gazette 2010/18)

(84) Designated Contracting States: 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 SE SI SK SM TR Designated Extension States: RS (30) Priority: 29.10.2008 FI 20086025 (71) Applicant: Polartherm Oy 29100 Luvia (FI)	(72) Inventor: SORVAKKO, Paavo FIN-26510 Rauma (FI) (74) Representative: Helke, Kimmo Kalervo  Kespat Oy P.O. Box 601 40101 Jyväskylä 40101 Jyväskylä (FI)