Appeal No. 95-5146
Application 08/152,557
not cleaning grooves at all [brief, page 7]. Appellant also
argues that the claimed dimensions have been disclosed as being
critical for proper operation of the magnetic tape recording and
reproducing apparatus, and that the examiner has failed to
demonstrate that the prior art suggests any dimensional
characteristics for a scraping edge [brief, pages 7-8].
We agree with appellant that indentations 2b of Kimura
are not on the contact face of the magnetic head for the purpose
of cleaning the tape face. Although Kimura discusses a desire to
reduce the amount of magnetic powder and binder which falls off
of the magnetic tape, Kimura achieves this result by eliminating
friction between the contact face of the magnetic head and the
tape. Thus, Kimura discloses that the magnetic tape of his
invention does not make contact with the head at large portions
along the width of the tape [translation, page 7]. Kimura
directs the artisan to eliminate contact between the tape face
and the contact face of the magnetic head.
Indentations 2b of Kimura’s Figure 3 are the result of
eliminating material from the contact face which would otherwise
contact the tape face. Kimura states that “[t]he areas at the
running surface of the magnetic tape (2) near the magnetic cores
(4) at both sides in directions A and B are eliminated so that
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