(19)

(11)

EP 0 535 024 A1

(12)

(43) Date of publication: 07.04.1993 Bulletin 1993/14 (21) Application number: 91910564.0 (22) Date of filing: 06.06.1991

(51) International Patent Classification (IPC):  E05F 1/ 12( . ) E05D 5/ 06( . ) (86) International application number: PCT/GB1991/000905 (87) International publication number: WO 1991/019071 (12.12.1991 Gazette 1991/28)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 06.06.1990 GB 19900012611 (71) Applicant: ITW LIMITED Windsor Berkshire SL4 3BD (GB)	(72) Inventors: ALLPORT, William, Scott Walsall, West Midlands WS3 1JG (GB) HUMPHRIES, Robert, Edward Alcester, Warwickshire B49 5LH (GB) LITTLE, John, Bernard N r Newport, Shropshire TF10 8LH (GB) (74) Representative: Nash, Keith Wilfrid  Pearl Assurance House 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)