Appeal No. 2001-1574
Application No. 08/856,050
BACKGROUND
The invention is directed to a disc cassette in which a recording disc is rotatably
received. The cassette has a slide bar connected to a shutter which is arranged to be
opened to provide access to heads for reading from or writing to the recording disc.
Representative claim 1 is reproduced below.
1. A disc cassette for use in a disc player having a head carriage, the
cassette comprising:
a case receiving a rotatable disc recording medium and having an
opening through which an information recording area of said medium is exposed;
a bridge defined by said case and formed in a front surface thereof
extending across a mouth portion of said opening parallel to said front surface of
said case and being offset therefrom in a direction toward a center of said disc
recording medium;
a slide bar having a width in a direction perpendicular to a top surface of
said disc smaller than a width of said case in said direction perpendicular to the
top surface of said disc and slidably mounted beside said bridge for moving
axially therealong; and
a shutter connected to said slide bar for moving therewith to selectively
open and close said opening in accordance with axial movement of said slide
bar, wherein a front surface of said shutter is flush with said front surface of said
case, and wherein when said shutter is moved to open said opening, said front
surface of said shutter forms a continuous line along said front surface of said
case with an edge of said case, and
wherein said slide bar has a base portion which overlaps an entire length
of said bridge when said shutter is in an open position, said base portion being
formed with a recess which faces in a direction away from a center of said disc
recording medium and adapted to mate with a front face of said head carriage of
said disc player when said head carriage comes to its innermost position, and
wherein said recess is defined between a front surface of said base portion of
said slide bar and said front surface of said shutter, thereby increasing a stroke
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Last modified: November 3, 2007