(19)

(11)

EP 0 046 780 A1

(12)

(43) Date of publication: 10.03.1982 Bulletin 1982/10 (21) Application number: 81900531.0 (22) Date of filing: 25.02.1981

(51) International Patent Classification (IPC):  E04D 1/ 26( . ) (86) International application number: PCT/NO1981/000004 (87) International publication number: WO 1981/002437 (03.09.1981 Gazette 1981/21)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 26.02.1980 NO 19800000540 (71) Applicant: Isola Fabrikker A/S N-3920 Eidanger (NO)	(72) Inventor: THIIS-EVENSEN d.y., Harald N-3900 Porsgrunn (NO) (74) Representative: Burman, Tore, et al  AWAPATENT AB, Box 45086 S-104 30 Stockholm S-104 30 Stockholm (SE)