Appeal No. 1999-2705
Application 08/686,756
DECISION ON APPEAL
This is a decision on appeal under 35 U.S.C. § 134 from
the final rejection of claims 1-8 and 13-16.
We reverse.
BACKGROUND
The disclosed invention relates to a process and
apparatus for recording digital signals on a magnetic tape
using a plurality of recording heads arranged in a matrix, so
that the magnetic tape is recorded in multiple longitudinal
tracks. Recording heads arranged in a matrix are known.
To produce the optimum range of magnetic flux for maximum
reproduction amplitude and negligible crosstalk, the operating
point of the recording heads must be maintained very
precisely. However, the magnetic flux in the gap of a
recording head depends not only on the magnetizing current
(which is the sum of a row current and column current) but
also on the magnetic properties of the recording head itself.
It is therefore difficult, if not impossible, to determine a
single value of magnetizing current for which all of the
recording heads have their operating points in an optimum
range.
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