(19)

(11)

EP 0 020 511 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 79901372.0 (22) Date of filing: 12.10.1979

(51) International Patent Classification (IPC):  G09F 9/ 37( . ) (86) International application number: PCT/SE1979/000207 (87) International publication number: WO 1980/000889 (01.05.1980 Gazette 1980/10)

(84) Designated Contracting States: AT CH DE FR GB NL (30) Priority: 12.10.1978 SE 19780010651 07.12.1978 SE 19780010651 (71) Applicant: NÄSSILS LJUSSKYLTAR AB S-102 23 Stockholm (SE)	(72) Inventor: HAKANSSON, Ake S-183 51 Täby (SE) (74) Representative: Nordén, Ake, et al  Oscar Grahn Patentbyra AB Box 19540 S-104 32 Stockholm S-104 32 Stockholm (SE)