G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.32
G11B 21/10 (2006.01) G11B 15/18 (2006.01) G11B 15/60 (2006.01) G11B 15/61 (2006.01) G11B 21/04 (2006.01)
Patent
CA 1064611
A SERVO INFORMATION PATTERN FOR ROTATING HEAD MAGNETIC TAPE UNIT INDEPENDENT OF AMPLITUDE Abstract of the Disclosure The position of a length of magnetic recording tape, adjacent a rotating head device, is servo controlled to accurately position a transverse tape data track in alignment with the head path. The tape includes two distinctive servo indicia. The first indicia is a magnetic flux transition which is oriented substantially parallel to the edge of the tape. The second indicia is a magnetic flux transition which is oriented at an angle to the edge of the tape. This second indicia is parallel to the magnetic flux transitions which comprise the data track, and said distinctive second indicia is provided for each data track to define the physical location thereof. The rotating head includes two head gaps, one of which is parallel to the first indicia, and the other of which is parallel to the second indicia. The head gaps angular relationship insures that the respective head gaps will read only that indicia which is parallel therewith. The time of crossing of each head gap with its readable indicia is a measure of head-track to data-track alignment.
235839
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