Appeal No. 95-3849
Application 08/029,549
particular, crystals "consisting predominantly of Si having a
size not larger than 80 microns are projected by approximately
0.3 to 3 microns from the surface area 20 (see FIG. 4) of the
solid solution or eutectic material" (col. 3, lines 46-50).
Shiba discloses a tape guide in the form of a cylindrical
roller having depressed rectangular portions 32 and raised
rectangular portions 34 alternately formed in a
circumferential direction. The diameter elevated portion has
a width of from 0.01 mm to 0.1 mm and a spacing between
adjacent elevated portions of from 0.05 mm to 0.15 mm. The
depth of the depressed portion 32 from the outer surface is in
the range of from 5 to 20 µm (col. 3, line 68 through col. 4,
line 5). "This tape guide makes it possible to remarkably
reduce the contact surface with the magnetic tape, thereby
reducing the friction of the running tape with the tape guide,
and to secure stable running of the tape . . . ." (Col. 2,
lines 29-33.)
Claims 1-4 and 6 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Tollefson and Kuroda.
Claim 5 stands rejected under 35 U.S.C. § 103 as being
unpatentable over Tollefson, Kuroda, and Shiba.
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