(19)

(11)

EP 0 521 922 A1

(12)

(43) Date of publication: 13.01.1993 Bulletin 1993/02 (21) Application number: 91906233.0 (22) Date of filing: 05.03.1991

(51) International Patent Classification (IPC):  E06B 1/ 00( . ) E06B 1/ 60( . ) E06B 1/ 02( . ) (86) International application number: PCT/GB1991/000342 (87) International publication number: WO 1991/014066 (19.09.1991 Gazette 1991/22)

(84) Designated Contracting States: DE ES FR GB NL (30) Priority: 06.03.1990 GB 19900005010 (60) Divisional application: 98119263.6 / 0892141 (71) Applicants: THURGAR BARDEX LIMITED Hitchen, Hertfordshire SG4 0JA (GB) Wood, Thomas John Atherstone, Warwickshire CV9 2HA (GB)	(72) Inventor: WOOD, Thomas John, Sentinel Products Ltd. Atherstone, Warwickshire CV9 2HA (GB) (74) Representative: Gee, David William  Farmhouse Court Marston Nr. Sutton Coldfield West Midlands B76 0DW Marston Nr. Sutton Coldfield West Midlands B76 0DW (GB)