(19)

(11)

EP 0 429 457 A1

(12)

(43) Date of publication: 05.06.1991 Bulletin 1991/23 (21) Application number: 89904726.0 (22) Date of filing: 22.08.1988

(51) International Patent Classification (IPC):  B29C 65/ 58( . ) F16L 11/ 22( . ) F16L 9/ 18( . ) G02B 6/ 44( . ) (86) International application number: PCT/US1988/002918 (87) International publication number: WO 1990/002286 (08.03.1990 Gazette 1990/06)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicants: HEX B- GROUP, LTD Mt. Clemens,MI 48043 (US) BARTHOLOMEW, Donald D Marine City, MI 48013 (US)	(72) Inventor: BARTHOLOMEW, Donald, D. Marine City, MI 48039 (US) (74) Representative: Williams, Trevor John  J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5EU London WC1R 5EU (GB)