Shutter for a cartridge case

Details Shutter for a cartridge case Shutter for a cartridge case

1991-03-19

1992-08-18

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

369291, G11B 2303

Patent

active

051404907

ABSTRACT:
A shutter for a cartridge is adapted to be mounted on a cartridge case of the cartridge so as to open and close a head insertion hole in the cartridge case housing a recording medium therein the shutter being made of a synthetic resin and includes a pair of opposed flat plate portions and a connecting plate portion interconnecting the pair of flat plate portions at proximal edges of the flat plate portions, the thickness of each of the flat plate portions increases progressively from the proximal edge thereof, disposed adjacent to the connecting plate portion, toward the other distal edge of the flat plate portion remote from the connecting plate portion and an apparatus for molding this shutter.

REFERENCES:
patent: 4682260 (1987-07-01), Oishi et al.
patent: 5036421 (1991-07-01), Kaneda et al.
patent: 5084862 (1992-01-01), Fujita et al.
Patent Abstracts of Japan, vol. 12, No. 345 (P-759) (3192) 16 Sep. 1988, and JP-A-63 103484 (Hitachi Maxell Ltd.) 9 May 1988, abstract only.
Patent Abstracts of Japan, vol. 12, No. 123 (P-690) (2970) 16 Apr. 1988, and JP-A-62 248181 (Hitachi Maxell Ltd.) 29 Oct. 1987, abstract only.

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