(19)

(11)

EP 0 040 233 A1

(12)

(43) Date of publication: 25.11.1981 Bulletin 1981/47 (21) Application number: 80902304.0 (22) Date of filing: 21.11.1980

(51) International Patent Classification (IPC):  E04B 1/ 68( . ) (86) International application number: PCT/SE1980/000297 (87) International publication number: WO 1981/001435 (28.05.1981 Gazette 1981/13)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL (30) Priority: 23.11.1979 SE 19790009724 23.04.1980 SE 19800003090 (71) Applicant: TÄTIS PLASTTÄTNINGAR AB S-183 64 Täby (SE)	(72) Inventors: DAHLBERG, Anders S-183 64 Täby (SE) DAHLBERG, Per S-183 64 Täby (SE) (74) Representative: Modin, Jan, et al  c/o Axel Ehrners Patentbyra AB Box 10316 S-100 55 Stockholm S-100 55 Stockholm (SE)