(19)

(11)

EP 0 417 244 A1

(12)

(43) Date of publication: 20.03.1991 Bulletin 1991/12 (21) Application number: 90905247.0 (22) Date of filing: 04.04.1990

(51) International Patent Classification (IPC):  H01Q 15/ 20( . ) (86) International application number: PCT/GB1990/000504 (87) International publication number: WO 1990/012430 (18.10.1990 Gazette 1990/24)

(84) Designated Contracting States: DE ES FR GB IT SE (30) Priority: 04.04.1989 GB 19890007556 (71) Applicant: WOODVILLE POLYMER ENGINEERING LIMITED Ross-on-Wye Herefordshire HR9 5NF (GB)	(72) Inventor: BROADHURST, Jeffrey, Charles Burton-on-Trent Staffordshire DE14 3DR (GB) (74) Representative: Hogg, Jeffery Keith  Dowty Group Services Limited Arle Court Cheltenham Gloucestershire, GL51 OTP Cheltenham Gloucestershire, GL51 OTP (GB)