Appeal No. 1999-2276
Application 08/785,802
In the present invention, the magnetic head assembly cores
are chamfered so as to correct the extension of magnetic fluxes
from erase gaps. Specification, page 7, lines 19-22. The
assembly ensures an optimal track width and an optimal erase
track width without increasing the amount of data to be erased.
Specification, page 7, lines 22-24.
Appellant’s representative claim 1 recites as follows:
1. A magnetic head assembly for erasing a first
predetermined erase track width, and for leaving a
first predetermined write/read track width, the
assembly comprising:
a write/read head comprising a pair of first cores
adhered to each other and having a coil opening, said
write/read head having a first groove defining a
write/read width; and
an erase head comprising a pair of second cores
adhered to each other and having a coil opening, only
one of said pair of second cores having second grooves
defining a write/read track width and two erase track
widths, said second grooves of said erase head being
formed in one of said pair of second cores which most
closely adjoins said pair of first cores of said
write/read head so that the first predetermined
write/read track width is less than said write/read
track width by a defined distance and so that the
first predetermined erase track width is greater than
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