(19)

(11)

EP 0 321 507 A1

(12)

(43) Date of publication: 28.06.1989 Bulletin 1989/26 (21) Application number: 88902973.0 (22) Date of filing: 17.03.1988

(51) International Patent Classification (IPC):  E04B 1/ 64( . ) (86) International application number: PCT/SE1988/000135 (87) International publication number: WO 1988/007111 (22.09.1988 Gazette 1988/21)

(84) Designated Contracting States: AT DE FR GB IT NL SE (30) Priority: 17.03.1987 SE 19870001103 (71) Applicant: EVER SEAL SYSTEMS AB S-417 05 Göteborg (SE)	(72) Inventors: HARTZELL, Göran S-430 84 Styrsö (SE) SKOGSBERG, Christer S-417 05 Göteborg (SE) (74) Representative: Moberg, Sture  STURE V MOBERG AB Kungstensgatan 48 S-113 59 Stockholm S-113 59 Stockholm (SE)