Appeal No. 96-3961
Application No. 08/295,268
The claimed invention relates to an optical disk
recording medium having a hub portion provided on one side of
a single layer disk substrate and a reinforcing plate provided
on the opposite side of the substrate.
Claim 1 is illustrative of the invention and reads as
follows:
1. An optical disk recording medium comprising:
a single layer disk substrate, information data being
writable in a data read/write side thereof, said substrate
further having an opening formed therethrough at a central
portion thereof;
a hub portion provided on one side of said disk and
covering said opening, said hub portion including a circular
magnetic plate having a centering opening provided at a
position corresponding to a center of said disk;
a reinforcing plate provided on a side of said substrate
opposite said one side on which said hub portion is provided,
said reinforcing plate also covering said opening of said
substrate and having a center opening formed therethrough.
The Examiner relies on the following references:
Ommori et al. (Ommori) 4,694,370 Sep. 15,
1987
Kikuchi 4,944,982 Jul. 31,
1990
Ota et al. (Ota) 5,265,086 Nov. 23,
1993
Naito 62-80240 May 22,
1987
2
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