Appeal No. 96-4001
Application 08/246,805
have been canceled.
The claimed invention relates to the provision of servo control information referred to as a servo
track pattern on a recording medium. More particularly, Appellant discloses at pages 51 and 52 of the
specification that the servo track pattern is comprised of fields of data which are separated into first and
second halves of data. The bits of the first half of a field of bits are reversed in polarity relative to a
second half of a bit field as illustrated in Figure 18 of the drawings.
Claim 1 is illustrative of the invention and is reproduced as follows:
1. A longitudinal servo track pattern located on an elongated medium having other areas on
which information are recorded and reproduced, said servo track pattern adapted to provide signals for
a servo system for controlling the position and velocity of the elongated medium relative to a magnetic
reproducing head which reads information from the elongated medium, said servo track pattern
comprising a plurality of digital mark patterns recorded thereon, each of said digital mark patterns
comprising:
a leading identifier field of digital bits;
a trailing identifier field of digital bits; and
a field of digital synchronizing data bits having a transition centrally located between said leading
and trailing identifier fields,
wherein said transition defines a first half and a second half of said each of said digital mark
patterns, said bits of said first half being reversed in polarity relative to said bits of said second half.
2
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