Disc cartridge shutter

Details Disc cartridge shutter Disc cartridge shutter

1988-07-29

1992-06-09

Levy, Stuart S.

Dynamic information storage or retrieval

Storage medium structure

Adjuncts or adapters

360133, 206312, 206444, G11B 2303

Patent

active

051213800

ABSTRACT:
A disc cartridge comprising a cartridge case having head insert openings and encasing a disc-type recording medium rotatably mounted therein and a shutter for opening and closing the head insert openings mounted on the cartridge case, the shutter being molded from a synthetic resin material having a water absorbability of not more than 0.05% by weight and a maximum bending strength of not less than 500 kg/cm.sup.2. The resulting shutter has a good resistance to deformation by an external force during working, handling and preservation. The shutter also comprises spherical crystals.

REFERENCES:
patent: 4118748 (1978-10-01), Doering et al.
patent: 4803678 (1989-02-01), Tanaka et al.
patent: 4849844 (1989-07-01), Kato
patent: 4908726 (1990-03-01), Kato
Modern Plastic Encyclopedia, vol. 62, No. 10A, Oct. 1985, MacGraw Hill, New York, New York, USA, p. 472.

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