(19)

(11)

EP 0 211 929 A1

(12)

(43) Date of publication: 04.03.1987 Bulletin 1987/10 (21) Application number: 86901542.0 (22) Date of filing: 04.02.1986

(51) International Patent Classification (IPC):  E04G 21/ 20( . ) (86) International application number: PCT/SE1986/000045 (87) International publication number: WO 1986/004949 (28.08.1986 Gazette 1986/19)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 15.02.1985 SE 19850000710 (71) Applicant: Gauffin, Ulf S-753 25 Uppsala (SE)	(72) Inventor: Gauffin, Ulf S-753 25 Uppsala (SE)