Method and press molding apparatus for forming information carri

Details Method and press molding apparatus for forming information carri Method and press molding apparatus for forming information carri

1985-07-10

1987-04-14

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 14, 264 25, 264102, 264107, 4251744, 425405R, 425407, 425421, 425810, B29D 1100

Patent

active

046577149

ABSTRACT:
A press molding apparatus and its method of operation for making an information carrier disc which comprises the steps of maintaining a mass of granular transparent synthetic material in a vacuum, radiating heat from an infrared heating unit to plasticize the synthetic material, and press-molding the plasticized synthetic material.

REFERENCES:
patent: 3883369 (1975-05-01), Badger et al.
patent: 4157931 (1979-06-01), Bricot et al.
patent: 4315723 (1982-02-01), Antoine et al.
patent: 4331628 (1982-05-01), Ziegler
patent: 4472124 (1984-09-01), Kashihara et al.
patent: 4518335 (1985-05-01), Pujari
Modern Plastics Encyclopedia, Oct. 1981, vol. 58, No. 10A, pp. 255-258, "Compression Molding".

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