(19)

(11)

EP 0 408 608 A1

(12)

(43) Date of publication: 23.01.1991 Bulletin 1991/04 (21) Application number: 89903493.0 (22) Date of filing: 22.03.1989

(51) International Patent Classification (IPC):  A44C 25/ 00( . ) F16B 45/ 00( . ) A44C 5/ 20( . ) (86) International application number: PCT/FI1989/000052 (87) International publication number: WO 1989/008998 (05.10.1989 Gazette 1989/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 31.03.1988 FI 19880001549 (71) Applicant: RANTA, Olavi Antero SF-00640 Helsinki (FI)	(72) Inventor: RANTA, Olavi Antero SF-00640 Helsinki (FI) (74) Representative: Alexander, Thomas Bruce, et al  Boult, Wade & Tennant 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)