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(11)

EP 2 437 794 A1

(12)

(43) Date of publication: 11.04.2012 Bulletin 2012/15 (21) Application number: 10721005.6 (22) Date of filing: 21.05.2010

(51) International Patent Classification (IPC):  A61L 2/18(2006.01) A61L 2/20(2006.01) B01D 19/00(2006.01) (86) International application number: PCT/EP2010/003135 (87) International publication number: WO 2010/139406 (09.12.2010 Gazette 2010/49)

(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 SE SI SK SM TR (30) Priority: 01.06.2009 SE 0900740 (71) Applicants: Tetra Laval Holdings & Finance S.A. 1009 Pully (CH) Hill, Aaron Erie, PA 16510 (US)	(72) Inventor: BACK, Lennart S-241 34 Eslöv (SE) (74) Representative: Tetra Pak - Patent Attorneys SE  C/o AB Tetra Pak Legal Affairs - D&E Ruben Rausings gata 221 86 Lund 221 86 Lund (SE)