(19)

(11)

EP 0 385 988 A1

(12)

(43) Date of publication: 12.09.1990 Bulletin 1990/37 (21) Application number: 88903974.0 (22) Date of filing: 15.04.1988

(51) International Patent Classification (IPC):  D04B 35/ 12( . ) D04B 35/ 18( . ) D04B 35/ 14( . ) (86) International application number: PCT/SE1988/000196 (87) International publication number: WO 1988/008048 (20.10.1988 Gazette 1988/23)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 16.04.1987 SE 19870001619 (71) Applicant: AKTIEBOLAGET IRO S-523 01 Ulricehamn (SE)	(72) Inventor: JACOBSSON, Kurt, Arne, Gunnar S-523 00 Ulricehmann (SE) (74) Representative: Nilsson, Lennart  Lennart Nilsson Patentbyra AB Box 271 S-311 23 Falkenberg S-311 23 Falkenberg (SE)