(19)

(11)

EP 0 441 793 A1

(12)

(43) Date of publication: 21.08.1991 Bulletin 1991/34 (21) Application number: 89910073.0 (22) Date of filing: 07.09.1989

(51) International Patent Classification (IPC):  E04B 1/ 41( . ) E04B 1/ 76( . ) (86) International application number: PCT/DK1989/000208 (87) International publication number: WO 1990/002853 (22.03.1990 Gazette 1990/07)

(84) Designated Contracting States: BE DE GB NL SE (30) Priority: 07.09.1988 DK 19880004964 (71) Applicant: TONEX V/ BJARNE ANDERSEN DK-8900 Randers (DK)	(72) Inventor: AMSTRUP, Kurt DK-8900 Randers (DK) (74) Representative: Hansen, Kaj  c/o Kaj Hansen ApS, Radgivende ingeniorfirma, Elsegarde Skovvej 5 DK-8400 Ebeltoft DK-8400 Ebeltoft (DK)