(19)

(11)

EP 0 516 793 A1

(12)

(43) Date of publication: 09.12.1992 Bulletin 1992/50 (21) Application number: 92901519.0 (22) Date of filing: 18.12.1991

(51) International Patent Classification (IPC):  B65H 33/ 04( . ) B65H 16/ 02( . ) B65H 35/ 06( . ) B65H 35/ 08( . ) B26D 1/ 43( . ) B65H 35/ 00( . ) B65H 35/ 07( . ) (86) International application number: PCT/GB1991/002263 (87) International publication number: WO 1992/011193 (09.07.1992 Gazette 1992/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 22.12.1990 GB 19900027966 (71) Applicant: PORTALS ENGINEERING LIMITED Whitchurch, Hampshire RC28 7NR (GB)	(72) Inventors: MARTIN, Derek Christopher Colchester, Essex CO2 9PN (GB) GIBBONS, Mathew George Jasper Colchester, Essex CO6 4EF (GB) (74) Representative: Gillam, Francis Cyril, et al  SANDERSON & CO. European Patent Attorneys 34, East Stockwell Street Colchester Essex CO1 1ST Colchester Essex CO1 1ST (GB)