(19)

(11)

EP 0 420 869 A1

(12)

(43) Date of publication: 10.04.1991 Bulletin 1991/15 (21) Application number: 89906390.0 (22) Date of filing: 25.05.1989

(51) International Patent Classification (IPC):  D03D 39/ 08( . ) (86) International application number: PCT/GB1989/000579 (87) International publication number: WO 1989/011558 (30.11.1989 Gazette 1989/28)

(84) Designated Contracting States: BE DE GB NL (30) Priority: 27.05.1988 GB 19880012595 (71) Applicant: BONAS GRIFFITH LIMITED Sunderland Tyne & Wear SR5 3TX (GB)	(72) Inventor: GRIFFITH, John, Dalton Tyne and Wear (GB) (74) Representative: Dealtry, Brian  Eric Potter & Clarkson St. Mary's Court St. Mary's Gate Nottingham NG1 1LE Nottingham NG1 1LE (GB)