(19)

(11)

EP 0 035 999 A1

(12)

(43) Date of publication: 23.09.1981 Bulletin 1981/38 (21) Application number: 80901700.0 (22) Date of filing: 09.09.1980

(51) International Patent Classification (IPC):  B29D 23/ 00( . ) B29C 47/ 24( . ) B29C 47/ 00( . ) (86) International application number: PCT/NO1980/000028 (87) International publication number: WO 1981/000823 (02.04.1981 Gazette 1981/08)

(84) Designated Contracting States: AT CH DE FR GB LI NL SE (30) Priority: 28.09.1979 NO 19790003128 (71) Applicant: A/S SONNICHSEN RORVALSEVERKET N-0483 Oslo 4 (NO)	(72) Inventor: BOEN, Per 1335 Snaroya (NO) (74) Representative: Hammar, Ernst, et al  H. Albihns Patentbyra AB, P.O. Box 3137 S-103 62 Stockholm S-103 62 Stockholm (SE)