(19)

(11)

EP 0 402 392 A1

(12)

(43) Date of publication: 19.12.1990 Bulletin 1990/51 (21) Application number: 89903199.0 (22) Date of filing: 16.02.1989

(51) International Patent Classification (IPC):  B65D 85/ 68( . ) F04B 39/ 12( . ) (86) International application number: PCT/GB1989/000181 (87) International publication number: WO 1989/007714 (24.08.1989 Gazette 1989/20)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 17.02.1988 GB 19880003672 (71) Applicant: NETWORK ELECTRONIC INDUSTRIES LIMITED London NW9 7BT (GB)	(72) Inventor: FREEMAN, John Hemel Hempstead HP1 1DD (GB) (74) Representative: Shaw, Laurence  5th Floor, Metropolitan House, 1 Hagley Road, Edgbaston Birmingham B16 8TG Birmingham B16 8TG (GB)