Patent ID: 6057995
Filing Date: 2000-05-02
Classification: G11B

Abstract:
A disc cartridge for use in a recording and/or reproducing apparatus having an elongated insertion opening to receive said cartridge in a predetermined normal inserting direction, with opposite end portions of said insertion opening having different configurations, said disc cartridge comprising:a disc-shaped recording medium; anda substantially rectangular main cartridge body rotatably accommodating said recording medium and being comprised of upper and lower cartridge halves defining respective major surfaces of said body and having mating peripheral portions defining first and second pairs of parallel sidewall sections of said body which respectively extend parallel to said normal insertion direction, said parallel sidewall sections including means for prohibiting erroneous insertion of the disc cartridge wherein said first-pair of said parallel sidewall sections has a different cross-sectional configuration than said second pair respectively without providing a groove in the parallel side wall sections of said cartridge main body, said different cross-sectional configurations of said respective first and second pairs of parallel sidewall sections corresponding to said different configurations of said opposite end portions of the insertion opening so that said cartridge body is insertable in said opening only in said normal inserting direction.