(19)

(11)

EP 0 138 846 A1

(12)

(43) Date of publication: 02.05.1985 Bulletin 1985/18 (21) Application number: 84900895.0 (22) Date of filing: 20.02.1984

(51) International Patent Classification (IPC):  E04F 15/ 04( . ) E04F 15/ 18( . ) E04F 15/ 16( . ) (86) International application number: PCT/NL1984/000006 (87) International publication number: WO 1984/003322 (30.08.1984 Gazette 1984/21)

(84) Designated Contracting States: AT CH DE FR GB LI NL SE (30) Priority: 22.02.1983 BE 19830895969 14.07.1983 BE 19830897287 (71) Applicant: VAN WINGERDEN, Willem NL-6171 JM Stein (NL)	(72) Inventor: VAN WINGERDEN, Willem NL-6171 JM Stein (NL) (74) Representative: Timmermans, Anthonius C.Th., Ir.  European Patent Attorneys Octrooibureau Zuid P.O. Box 2287 NL-5600 CG Eindhoven NL-5600 CG Eindhoven (NL)