Disc cartridge molding method and apparatus

Details Disc cartridge molding method and apparatus Disc cartridge molding method and apparatus

1995-09-12

1997-09-16

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156242, 156500, 2643281, 425577, B29C 4700

Patent

active

056676166

ABSTRACT:
A disc cartridge is made up of an upper cartridge part and a lower cartridge part for housing a disc-shaped recording medium, such as an optical disc or a magneto-optical disc. At least one of the upper cartridge part and the lower cartridge part has a head-accessing aperture for exposing at least a portion of the disc-shaped recording medium to the outside. Apparatus for making the disc cartridge includes a first die having a protrusion for forming the head-accessing aperture. The first die defines a cavity on an upper surface of the upper or lower cartridge part, a second die defines a cavity on the inner surface of the upper or lower cartridge part, and an insert die is formed separately from and united to the second die. The insert die has an extension for forming an end face on the inner surface of the upper or lower cartridge part and a protrusion from the extension for abulting the protrusion of the first die during die closure for forming the head-accessing aperture in the upper or lower cartridge part. The second die has at its end portion connected to the insert die a protrusion extending towards the first die. The second die is connected to the insert die with an end face of the extension of the insert die being protruded further towards the first die than the end face of the protrusion of the second die.

REFERENCES:
patent: 4900380 (1990-02-01), Matsuzawa
patent: 4909871 (1990-03-01), Todo et al.
patent: 5204047 (1993-04-01), Wohlrab
patent: 5204127 (1993-04-01), Prusha
patent: 5340528 (1994-08-01), Machida et al.
patent: 5372770 (1994-12-01), Machida
patent: 5388982 (1995-02-01), Takahashi et al.
patent: 5536456 (1996-07-01), Kuwahara et al.

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