Injection molding apparatus for the injection molding of data st

Details Injection molding apparatus for the injection molding of data st Injection molding apparatus for the injection molding of data st

1987-04-10

1988-03-15

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

264106, 26432811, 425571, 425575, 425810, B29C 4526

Patent

active

047310138

ABSTRACT:
An injection molding apparatus for the injection molding of data storage discs of thermoplastic synthetic material, includes an embossing plate mounted on a movable die for embossing information pits on one side of the discs. An insert confronting the embossing plate is mounted on the fixed die of the apparatus, the insert having a die opening through which the thermoplastic synthetic material may be injected into the die nest formed between the dies, and the insert being of non-corrosive and essentially non-porous, non-metallic material with its outer surface being highly polished, essentially smooth and unpitted so as to produce discs having a smooth side opposite the embossed side.

REFERENCES:
patent: 3969057 (1976-07-01), Pierre
patent: 4118168 (1978-10-01), Rees et al.
patent: 4251479 (1981-02-01), Pecht et al.
patent: 4449916 (1984-05-01), Ito et al.
patent: 4462780 (1984-07-01), Stavitsky et al.
patent: 4599063 (1986-07-01), Gutjahr
patent: 4614630 (1986-09-01), Pluim, Jr.

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