(19)

(11)

EP 0 394 248 A1

(12)

(43) Date of publication: 31.10.1990 Bulletin 1990/44 (21) Application number: 88905409.0 (22) Date of filing: 22.06.1988

(51) International Patent Classification (IPC):  E04G 17/ 00( . ) E04G 17/ 14( . ) E04G 17/ 04( . ) (86) International application number: PCT/GB1988/000485 (87) International publication number: WO 1988/010348 (29.12.1988 Gazette 1988/28)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 27.06.1987 GB 19870015145 (71) Applicant: GKN Kwikform Limited GB-Ealing, London W5 5SE (GB)	(72) Inventor: LOVERING, Dennis, William Wolverhampton West Midlands WV6 7DJ (GB) (74) Representative: Thorpe, Brian  Guest Keen and Nettlefolds plc Group Patents and Licensing Department P.O. Box 55 Ipsley House Ipsley Church Lane Redditch Worcestershire B98 0TL Redditch Worcestershire B98 0TL (GB)