(19)

(11)

EP 0 051 657 A1

(12)

(43) Date of publication: 19.05.1982 Bulletin 1982/20 (21) Application number: 81901379.0 (22) Date of filing: 23.12.1980

(51) International Patent Classification (IPC):  G03C 1/ 805( . ) B24B 21/ 12( . ) G03C 1/ 795( . ) G09F 3/ 10( . ) B24B 21/ 04( . ) B41M 3/ 12( . ) G03C 11/ 12( . ) G09F 3/ 02( . ) (86) International application number: PCT/US1980/001711 (87) International publication number: WO 1981/003301 (26.11.1981 Gazette 1981/28)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 15.05.1980 US 19800149905 (71) Applicant: ACROMETAL PRODUCTS, INC. Minneapolis, MN 55401 (US)	(72) Inventor: STEINBACK, Clarence I. Minnepolis, MN 55435 (US) (74) Representative: Rostovanyi, Peter  AWAPATENT AB, Box 5117 S-200 71 Malmö S-200 71 Malmö (SE)