(19)

(11)

EP 0 424 367 A1

(12)

(43) Date of publication: 02.05.1991 Bulletin 1991/18 (21) Application number: 88903851.0 (22) Date of filing: 20.04.1988

(51) International Patent Classification (IPC):  A01C 1/ 08( . ) A01C 9/ 00( . ) (86) International application number: PCT/FI1988/000058 (87) International publication number: WO 1988/008244 (03.11.1988 Gazette 1988/24)

(84) Designated Contracting States: BE DE NL SE (30) Priority: 24.04.1987 FI 19870001816 (71) Applicant: ERLANDS & CO SF-64140 Tjöck (FI)	(74) Representative: Magnusson, Gustav  MAGNUPATENT AB P.O. Box 6207 S-200 11 Malmö 6 S-200 11 Malmö 6 (SE)