Synthetic resin disc cartridge shutter having non-engaging raise

Details Synthetic resin disc cartridge shutter having non-engaging raise Synthetic resin disc cartridge shutter having non-engaging raise

1992-11-19

1994-04-19

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2303

Patent

active

053051726

ABSTRACT:
A cartridge including a cartridge case having a disc-shaped recording medium received therein so as to allow predetermined information signals to be recorded and reproduced, and a shutter molded of a synthetic resin to slidably open and close an opening portion formed on the cartridge case so as to allow at least a part of the disc-shaped recording medium to be exposed to the outside. In accordance with the present invention, the shutter is composed of an upper main plate, a lower main plate and a coupling plate which connects the upper main plate to the lower main plate via the coupling plate in an integrally molded state while having an U-shaped cross-sectional contour to hold the cartridge case in a clamped state. A gate used for performing a molding operation is formed on the outer surface of the side plate, with the position of the gate being determined such that it always remains within an effective opening region corresponding to the opening portion. The invention also provides a method for producing the shutter.

REFERENCES:
patent: 5084862 (1992-01-01), Fujita

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