(19)

(11)

EP 0 064 537 A1

(12)

(43) Date of publication: 17.11.1982 Bulletin 1982/46 (21) Application number: 81903162.0 (22) Date of filing: 02.11.1981

(51) International Patent Classification (IPC):  B29C 65/ 58( . ) F16L 11/ 16( . ) F16L 9/ 16( . ) B29C 53/ 58( . ) (86) International application number: PCT/US1981/001478 (87) International publication number: WO 1982/001757 (27.05.1982 Gazette 1982/14)

(84) Designated Contracting States: AT DE FR GB LU NL SE (30) Priority: 14.11.1980 AU 19800006500 13.10.1981 US 19810310693 (71) Applicant: JOHNS-MANVILLE CORPORATION Denver, CO 80217 (US)	(72) Inventors: MENZEL, Stanley William Otto San Diego, CA 92120 (US) VANCE, Gilbert William Jamul CA (US) MOMINEE, David Earl Alpine, CA (US) (74) Representative: Siebert & Grättinger Patentanwälte  Almeidaweg 35 D-8130 Starnberg D-8130 Starnberg (DE)