Appeal No. 97-1398
Application 08/295,225
a takeup reel mounted in the housing; and
a length of tape mounted between the supply reel and the
takeup reel, wherein the tape has a front side which has a
recordable front side scrubbing material for cleaning the heads,
and a backside, wherein the tape comprises magnetic material on
the front side to permit the tape portion to record and play
signals including audio sounds and video images, and wherein the
magnetic material and the scrubbing material are located in the
same length of tape portion to permit simultaneous cleaning and
playing of recorded signals; and
wherein when the cleaning cassette is inserted into the VCR
the tape is capable of cleaning the heads and tape guides with
only the front side of the tape contacting the heads, regardless
of the internal configuration of these components in the VCR.
Unlike claim 2, claim 3 does not recite a leader portion,
let alone a leader portion that carries a scrubbing material for
cleaning the capstan. Nor does claim 3 require a scrubbing
material on the back side of the tape, as required by claims 2
and 30. The only limitations claim 3 places on the composition
of the tape are that its front side have a scrubbing material and
a recordable (but not necessarily prerecorded) magnetic material
located in the same length of the tape portion so as to permit
simultaneous cleaning and playing of recorded signals. As for
the "wherein" clause, appellants have not explained, and it is
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