(19)

(11)

EP 0 644 823 A1

(12)

(43) Date of publication: 29.03.1995 Bulletin 1995/13 (21) Application number: 93909387.0 (22) Date of filing: 23.04.1993

(51) International Patent Classification (IPC):  B29C 47/ 06( . ) B29C 49/ 00( . ) B29L 9/ 00( . ) B29C 47/ 12( . ) B29K 29/ 00( . ) (86) International application number: PCT/GB1993/000854 (87) International publication number: WO 1993/022125 (11.11.1993 Gazette 1993/27)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU NL SE (30) Priority: 23.04.1992 GB 19920008834 16.03.1993 GB 19930005322 (71) Applicant: BRITISH TECHNOLOGY GROUP INTER-CORPORATE LICENSING LIMITED London SE1 6BU (GB)	(72) Inventors: TAYLOR, Paul Anthony Worle, Weston-Super-Mare BS22 0RY (GB) GONINAN, Kevin Mark Worle, Weston-Super-Mare BS22 0RY (GB) (74) Representative: Neville, Peter Warwick  Patents Department British Technology Group Ltd 101 Newington Causeway London SE1 6BU London SE1 6BU (GB)