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(11)

EP 0 640 031 A1

(12)

(43) Date of publication: 01.03.1995 Bulletin 1995/09 (21) Application number: 92914185.0 (22) Date of filing: 25.03.1992

(51) International Patent Classification (IPC):  B29B 7/ 80( . ) B29B 7/ 74( . ) B29C 31/ 10( . ) B29B 7/ 60( . ) B29B 7/ 90( . ) B29C 47/ 00( . ) (86) International application number: PCT/US1992/002141 (87) International publication number: WO 1993/018899 (30.09.1993 Gazette 1993/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: CROFT, Neil, Jay Clarkston, MI 48343 (US) GAUL, Milton, U., Jr. Hockessin, DE 19707 (US) LATHROP, John, Francis Washington, WV 26181 (US) MAURER, Heinrich D-6390 Ufinger-Efchbach (DE) SHIH, Chi-Kai Chadds Ford, PA 19317 (US) (74) Representative: Woodcraft, David Charles  BROOKES & MARTIN High Holborn House 52/54 High Holborn London, WC1V 6SE London, WC1V 6SE (GB)