(19)

(11)

EP 0 284 623 A1

(12)

(43) Date of publication: 05.10.1988 Bulletin 1988/40 (21) Application number: 87906434.0 (22) Date of filing: 22.09.1987

(51) International Patent Classification (IPC):  B64C 1/ 20( . ) B65G 67/ 20( . ) (86) International application number: PCT/GB1987/000666 (87) International publication number: WO 1988/002347 (07.04.1988 Gazette 1988/08)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 23.09.1986 GB 19860022824 (71) Applicant: HYDRAROLL LIMITED Anglesey Gwynedd LL60 6HR (GB)	(72) Inventor: JONES, Joseph, Morus Anglesey, Gwynedd (GB) (74) Representative: Johnson, Terence Leslie, et al  Edward Evans & Co. Chancery House 53-64 Chancery Lane London WC2A 1SD London WC2A 1SD (GB)