Appeal No. 95-3849
Application 08/029,549
The examiner relies on the following prior art:
Shiba 4,466,582 August 21,
1984
Kuroda 4,669,019 May 26,
1987
Tollefson 4,745,508 May 17,
1988
Tollefson discloses a tape guide pin made of plastic
containing a small proportion of lubricant and anti-static
agent, instead of the usual stainless steel. The surface of
the plastic pins due to molding was quite rough, e.g., 10 µm
peak-to-peak (col. 2, lines 44-47), compared to stainless
steel pins which might permit only two peaks of 0.627 µm
(col. 1, line 34). However, the performance of the plastic
pins, especially in tracking and RF loss at high temperatures
and humidity, was considered outstanding (col. 2, approx.
lines 34-39).
Kuroda discloses making the stationary drum of a video
tape recorder with a tape guide surface area comprising a
solid solution or a eutectic material which is composed of
aluminum as a major component, which contains crystals
consisting predominantly of Si (col. 3, lines 8-15). The Si
crystals present at the surface are disposed to project from
the solid solution or eutectic surface by etching. In
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