Appeal No. 1999-2276
Application 08/785,802
Appellant’s specification (“Specification”), page 1, lines 1-4.
The invention’s magnetic head assembly for a flexible disk
drive is capable of preventing the erasure of data beyond a
predetermined erasure width. Specification, page 2, lines 7-11.
In a conventional assembly, the W/R track width and erase track
widths are defined only by the L-shaped core of the erase head.
Specification, page 4, lines 21-24. Hence, magnetic fluxes from
the erase gaps extend to the outside of the erase track widths
and erase data over more than a predetermined width.
Specification, page 4, line 24, to page 5, line 3. As a result,
the reproduction output is lowered. Specification, page 5,
lines 3-5.
As reproduced below in Appellant’s Figures 2A and 2B, the
magnetic head assembly 40 of the present invention has a W/R
head 50 made up of an L-shaped core 51 and an I-shaped core 52
and an erase head 60 made up of an L-shaped core 61 and an I-
shaped core 62. The cores 51 and 52 are chamfered (grooved) to
provide a W/R width 53 while the core 62 is chamfered to provide
e r a s e t r a c k
widths 63a and 63b and a W/R track width 64. The L-shaped core
61 of the erase head 60 is not chamfered. Specification, page
2
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