(19)

(11)

EP 0 136 288 A1

(12)

(43) Date of publication: 10.04.1985 Bulletin 1985/15 (21) Application number: 84900558.0 (22) Date of filing: 19.01.1984

(51) International Patent Classification (IPC):  E04D 13/ 17( . ) (86) International application number: PCT/SE1984/000017 (87) International publication number: WO 1984/002970 (02.08.1984 Gazette 1984/18)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL (30) Priority: 27.01.1983 SE 19830000402 (71) Applicant: DOBEL AB S-78184 Borlänge (SE)	(72) Inventors: INGVARSSON, Lars, Ingvar S-781 62 Borlänge (SE) EIBRANT, Karl, Owe S-770 70 Langshyttan (SE) (74) Representative: Wärulf, Olov  Svenkst Stal S-613 01 Oxelösund S-613 01 Oxelösund (SE)