| 摘要 |
<p>1,095,135. Recording and playback. AGFA A.G. Feb. 19, 1965 [Feb. 29, 1964], No. 7329/65. Heading G5K. In a process for magnetic recording, a magnetizable recording member is heated to above its Curie point and subjected while at that temperature to the magnetic field of the signal to be recorded. It is then cooled while still under the influence of this field. The process is especially suitable for copying, where the signal to be recorded is carried on a second recording member whose Curie point is considerably greater than that of the magnetizable member and which may be a normal Fe 2 O 3 magnetizable layer on polyester tape. The magnetizable compound used on the member may be chromium dioxide which may be modified by the addition of other substances, or may be a ferromagnetic alloy of iron nickel or cobalt. It should have a Curie point between 50‹ and 220‹ C.</p> |
