(19)

(11)

EP 0 420 846 A1

(12)

(43) Date of publication: 10.04.1991 Bulletin 1991/15 (21) Application number: 89900359.0 (22) Date of filing: 15.12.1988

(51) International Patent Classification (IPC):  D06L 3/ 02( . ) D06L 3/ 08( . ) D06L 3/ 06( . ) D06L 3/ 14( . ) (86) International application number: PCT/SE1988/000685 (87) International publication number: WO 1989/005882 (29.06.1989 Gazette 1989/14)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 21.12.1987 WO 1987SE00624 (71) Applicant: AGA AKTIEBOLAG S-181 81 Lidingö (SE)	(72) Inventors: MALANDRUCCOLO, Robert North Royalton, OH 44133 (US) PETERSSON, Martin Seven Hills, OH 44131 (US) THEXTON, Timothy Atizapan, Edo. (MX) SCHULZ, Robert Lyndhurst, OH 44124 (US) SJÖBLOM, Krister S-181 61 Lidingö (SE) (74) Representative: Wiedemann, Bernd, et al  AGA AKTIEBOLAG Patent Department S-181 81 Lidingö S-181 81 Lidingö (SE)