(19)

(11)

EP 0 238 471 A3

(12)	EUROPEAN PATENT APPLICATION

(88) Date of publication A3: 13.04.1988 Bulletin 1988/15 (43) Date of publication A2: 23.09.1987 Bulletin 1987/39 (21) Application number: 87870004 (22) Date of filing: 14.01.1987

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI NL SE (30) Priority: 24.02.1986 ZA 861344 (71) Applicant: Barreto, Viriato Jorge Soares  ()	(72) Inventor: Barreto, Viriato Jorge Soares  ()