(19)

(11)

EP 0 102 994 A1

(12)

(43) Date of publication: 21.03.1984 Bulletin 1984/12 (21) Application number: 83900932.0 (22) Date of filing: 16.03.1983

(51) International Patent Classification (IPC):  B28B 23/ 00( . ) E04C 2/ 28( . ) (86) International application number: PCT/FI1983/000025 (87) International publication number: WO 1983/003276 (29.09.1983 Gazette 1983/23)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 16.03.1982 FI 19820000890 (71) Applicant: REDECON OY SF-00120 Helsinki 12 (FI)	(72) Inventor: KOIVU, Teuvo SF-02180 Espoo 18 (FI)