(19)

(11)

EP 0 469 092 A1

(12)

(43) Date of publication: 05.02.1992 Bulletin 1992/06 (21) Application number: 90908093.0 (22) Date of filing: 12.04.1990

(51) International Patent Classification (IPC):  F41B 11/ 32( . ) (86) International application number: PCT/SE1990/000249 (87) International publication number: WO 1990/012994 (01.11.1990 Gazette 1990/25)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 17.04.1989 SE 19890001368 (71) Applicant: PERSIMA INVENT AB Skärhamn (SE)	(72) Inventor: OLOFSSON, Sigfrid, Marenius S-455 00 Munkedal (SE) (74) Representative: Ferkinghoff, Claes-Göran  AWAPATENT AB, Södra Hamngatan 37-41, P.O. Box 11394 S-404 28 Göteborg S-404 28 Göteborg (SE)