Magnetogram carrier in the form of a disc, cylinder or strip with guide grooves

摘要

673,310. Magnetic records. DYNAMITAKT.-GES., VORM A. NOBEL & CO. and ASSMANN GES.; W.July 25, 1950. [Jan. 26, 1949] No. 18600/50. Class 40 (ii). A magnetic record carrier with guide grooves comprises a magnetizable layer pressed or stuck on a base of non-magnetic material with simultaneous formation of the guide grooves.