(19)

(11)

EP 0 591 523 A1

(12)

(43) Date of publication: 13.04.1994 Bulletin 1994/15 (21) Application number: 93912814.0 (22) Date of filing: 26.05.1993

(51) International Patent Classification (IPC):  A01K 31/ 17( . ) (86) International application number: PCT/EP1993/001341 (87) International publication number: WO 1993/023992 (09.12.1993 Gazette 1993/29)

(84) Designated Contracting States: BE DE ES FR GB NL PT (30) Priority: 27.05.1992 NL 19920000942 (71) Applicant: ROXELL N.V. B-9990 Maldegem (BE)	(72) Inventor: VAN DAELE, Antoine Achiel B-9900 Eeklo (BE) (74) Representative: Iemenschot, Johannes Andreas, Ir., et al  van Exter Polak & Charlouis B.V., P.O. Box 3241 NL-2280 GE Rijswijk NL-2280 GE Rijswijk (NL)