Appeal No. 1999-2755
Application No. 08/599,105
reference surfaces and load ball rolling grooves; subjecting
the slider body to plating so as to form a rust-proofing layer
over all the surfaces of the slider body including the
mounting surfaces and grooves; and grinding the mounting
surfaces and grooves, which for operating accuracy should not
be plated, to remove the rust-proofing. We are further
informed that the problem with the prior art method is that
when the slider body is mounted on the grinder after the
plating step, the surfaces of the slider body other than the
mounting surfaces and the grooves may be damaged or the rust-
proofing layer may be unintentionally removed.
As to the Takahashi document, this patent makes us aware
that, at a time prior to the appellant’s invention, it was
known in the electrodeposition art to mask portions of an
element prior to subjecting the element to electrodeposition
in order to prevent the deposition of coating material on the
portions so masked. Col. 2, ll. 3-10. For example, Takahashi
teaches that it was well known in the art to use a masking
plug of foamable material to mask the threaded bore of a nut
prior to electrodeposition. In use, the plug was inserted
into the threaded bore prior to electrodeposition of the nut
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