Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Patent
1995-02-16
1997-09-23
Levy, Stuart S.
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
G11B 2304
Patent
active
056712120
ABSTRACT:
A disc cartridge has a casing having first and second apertures and first and second shutters slidably mounted to the casing for selectively opening and closing the first and second apertures. First and second shutter openers are respectively connected to the first and second shutters. Only the first aperture is opened using the first shutter opener when the disc cartridge is loaded in a standard specifications or existing recording and/or reproducing apparatus. When the disc cartridge is loaded in an optional specifications apparatus, both the first and second shutter openers are used to open the first and second apertures, respectively. A disc cartridge compatible with both new plural head recording and reproducing apparatuses and existing single head recording and reproducing apparatuses is thus provided while offering improved resistance to penetration of dust and other foreign matter into the casing by opening only the aperture(s) required for head insertion.
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Miyazaki Benichi
Murai Junichi
Nishino Yukio
Letscher George J.
Levy Stuart S.
Matsushita Electric - Industrial Co., Ltd.
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