Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Patent
1992-10-21
1994-02-22
Levy, Stuart S.
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
360133, G11B 2303
Patent
active
052894576
ABSTRACT:
A cartridge case for encasing therein a recording medium disc. The cartridge case includes a shutter which is slidably mounted thereon for opening/closing at least one head insertion hole formed in the cartridge case, a guide portion formed in the front edge of the cartridge case in an insertion direction toward a recording and reproducing apparatus, a slider slidingly engaged with the guide portion for supporting the shutters and a return coil spring for biasing the shutter through the slider to a position where the shutter closes the head insertion hole. The spring includes an elastic wire coiled portion and two arms which extend therefrom. One of the arms includes a first extension portion extending substantially along a circumferential periphery of the disc from the coiled portion and a second extension portion bent from the first extension portion along a front wall in the insertion direction of the recording and reproducing apparatus.
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Dai Nippon Insatsu Kabushiki Kaisha
Ditmyer Paul J.
Levy Stuart S.
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