(19)

(11)

EP 1 037 857 A1

(12)

(43) Date of publication: 27.09.2000 Bulletin 2000/39 (21) Application number: 97941687.2 (22) Date of filing: 17.09.1997

(51) International Patent Classification (IPC)7: C02F 1/78, C02F 1/36 (86) International application number: PCT/US9716/558 (87) International publication number: WO 9914/163 (25.03.1999 Gazette 1999/12)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (71) Applicant: Hew-Lyn Inc. Rogers, MN 55374 (US)	(72) Inventor: OLSEN, Philip, C. Maple Grove, MN 55311 (US) (74) Representative: Hepworth, John Malcolm et al Hepworth Lawrence Bryer & BizleyBloxam CourtCorporation Street Rugby,Warwickshire CV21 2DU Rugby,Warwickshire CV21 2DU (GB)