Appeal No. 97-3469
Application 08/188,427
This is a decision on appeal under 35 U.S.C. § 134 from
the examiner's final rejection of claims 1, 6, 11, and 15-30.
Claims 2-5, 7-10, and 12-14 have been canceled.
We reverse.
BACKGROUND
The invention is in a rotary actuator for positioning a
dual gap (write gap and read gap) transducing head relative to
a track on a rotating recording medium and a method for
reducing track misregistration. Track misregistration is
where the read gap tries to read along a portion of the track
where there is no information written or to read undesired
information from an adjacent data track. The write gap, which
is located in front of the read gap in the direction of
relative movement of the head over the track, defines a shadow
or "tunnel margin" of the track. The invention is that the
read gap has a size and position to read information only from
the shadow or the tunnel margin of the write gap at all
positions of the head between the inner and outer radial
positions over the rotating recording medium. The position
errors of the read gap may be defined in terms of mathematical
relationships as in claims 17 and 18.
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