Appeal No. 1997-3960
Application 08/249,700
The disclosed invention pertains to a disc cartridge for
use with a disc apparatus which is capable of determining whether
the inserted cartridge contains an optical disc or a magneto-
optical disc. More particularly, the type of disc is determined
by discriminating the height of a recess on a lateral side of the
disc cartridge.
Representative claim 12 is reproduced as follows:
12. A disc cartridge for use with a miniature disc shaped
recording medium, the disc shaped recording medium having a
diameter of 64 mm, comprising:
a cartridge main body for accommodating the disc shaped
recording medium, the cartridge main body defining a plurality of
positioning pin engagement holes on a major surface thereof; and
a discriminating section formed in the cartridge main body
for discriminating the type of disc shaped recording medium
accommodated within the cartridge main body, wherein the
discriminating section is a recess which is formed in a lateral
side of the cartridge main body adjacent one of said positioning
pin engagement holes, the lateral side of the cartridge main body
being different from, and perpendicular to, the major surface of
the cartridge main body, a height of the recess designating the
type of disc shaped recording medium accommodated within the
cartridge main body, the height of the recess being detectible by
external detecting means to control a position of an external
magnetic field generating means of a disc recording and
reproducing apparatus as a function of the detected height of the
recess when the cartridge main body is loaded into the disc
recording and reproducing apparatus.
The examiner relies on the following references:
Motoyama et al. (Motoyama) 4,837,758 June 06, 1989
Suzuki 4,876,619 Oct. 24, 1989
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