(19)

(11)

EP 0 041 970 A1

(12)

(43) Date of publication: 23.12.1981 Bulletin 1981/51 (21) Application number: 80902358.0 (22) Date of filing: 05.12.1980

(51) International Patent Classification (IPC):  B23K 9/ 095( . ) B23K 9/ 127( . ) (86) International application number: PCT/NO1980/000042 (87) International publication number: WO 1981/001676 (25.06.1981 Gazette 1981/15)

(84) Designated Contracting States: FR (30) Priority: 06.12.1979 NO 19790003978 (71) Applicant: TRALLFA, Nils Underhaug N-4341 Bryne (NO)	(72) Inventors: MOLAUG, Ole N-4340 Bryne (NO) KVERNELAND, Kjell Olavus N-4000 Stavanger (NO) KJOSAVIK, Dag G. N-4300 Sandnes (NO)