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Document Type and Number:
Japanese Patent JPS6261419
Kind Code:
B2
Abstract:
An improved apparatus and method of molding a high density information disc which includes maintaining the molding composition at an elevated temperature between the extrusion step and the record pressing step, such that the resultant disc is of improved quality. A heated shot cup is provided to maintain the extruded molding composition at the elevated temperature and in which the same is molded into a preform from which the disc is pressed.

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Inventors:
TOOMASU EDOWAADO SUMISU
Application Number:
JP18951080A
Publication Date:
December 21, 1987
Filing Date:
December 25, 1980
Export Citation:
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Assignee:
RCA CORP
International Classes:
B29D17/00; B29B11/10; B29B13/02; B29C43/02; B29C61/00; B29C69/00; G11B3/68; G11B3/70



 
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