(19)

(11)

EP 0 040 221 A1

(12)

(43) Date of publication: 25.11.1981 Bulletin 1981/47 (21) Application number: 80902218.0 (22) Date of filing: 14.11.1980

(51) International Patent Classification (IPC):  G09B 17/ 00( . ) G09B 19/ 06( . ) G09B 19/ 04( . ) (86) International application number: PCT/AU1980/000086 (87) International publication number: WO 1981/001478 (28.05.1981 Gazette 1981/13)

(84) Designated Contracting States: DE FR GB (30) Priority: 16.11.1979 AU 19790001352 (71) Applicant: SAKAI, Margeret Clayton South, Melbourne Vic. 3169 (AU)	(72) Inventor: SAKAI, Margeret Clayton South, Melbourne Vic. 3169 (AU) (74) Representative: Andrejewski, Walter, Dr.  Patentanwälte Andrejewski, Honke & Partner Postfach 10 02 54 D-45002 Essen D-45002 Essen (DE)