(19)

(11)

EP 0 447 532 A1

(12)

(43) Date of publication: 25.09.1991 Bulletin 1991/39 (21) Application number: 90915157.0 (22) Date of filing: 10.10.1990

(51) International Patent Classification (IPC):  G01R 1/ 04( . ) H05K 13/ 00( . ) (86) International application number: PCT/GB1990/001557 (87) International publication number: WO 1991/006203 (02.05.1991 Gazette 1991/10)

(84) Designated Contracting States: DE DK ES FR IT NL SE (30) Priority: 10.10.1989 GB 19890022790 (71) Applicant: DOWTY WOODVILLE POLYMER LIMITED Ross-On-Wye, Herefordshire HR9 5NF (GB)	(72) Inventors: ICKE, Michael, Anthony Nr. Evesham Worcestershire WR11 5HB (GB) RILEY, David, Lloyd Hereford HR1 1QR (GB) (74) Representative: Hogg, Jeffery Keith  Dowty Group Services Limited Arle Court Cheltenham Gloucestershire, GL51 OTP Cheltenham Gloucestershire, GL51 OTP (GB)