(19)

(11)

EP 0 035 012 A1

(12)

(43) Date of publication: 09.09.1981 Bulletin 1981/36 (21) Application number: 79900929.0 (22) Date of filing: 10.08.1979

(51) International Patent Classification (IPC):  G03D 5/ 06( . ) (86) International application number: PCT/SE1979/000169 (87) International publication number: WO 1981/000465 (19.02.1981 Gazette 1981/05)

(84) Designated Contracting States: FR (71) Applicant: ENG, Olov S-505 90 Boräs (SE)	(72) Inventor: ENG, Olov S-505 90 Boräs (SE) (74) Representative: Westman, Börje, et al  Göteborgs Patentbyra AB Box 5005 S-402 21 Göteborg S-402 21 Göteborg (SE)