(19)

(11)

EP 0 023 494 A1

(12)

(43) Date of publication: 11.02.1981 Bulletin 1981/06 (21) Application number: 80900154.0 (22) Date of filing: 08.02.1980

(51) International Patent Classification (IPC):  B23B 31/ 12( . ) (86) International application number: PCT/DK1980/000010 (87) International publication number: WO 1980/001661 (21.08.1980 Gazette 1980/19)

(84) Designated Contracting States: FR (30) Priority: 09.02.1979 DK 19790000545 (71) Applicants: NIELSEN, Knud Helge DK-2730 Herlev (DK) CARLSEN, Poul Erik Korsman DK-2750 Ballerup (DK)	(72) Inventors: NIELSEN, Knud Helge DK-2730 Herlev (DK) CARLSEN, Poul Erik Korsman DK-2750 Ballerup (DK)