Phonograph record pressing die assembly

Details Phonograph record pressing die assembly Phonograph record pressing die assembly

1975-05-12

1976-03-02

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Press forming apparatus having opposed press members

Including both heating and cooling means

425408, 425810, B30B 1506, B29D 1700

Patent

active

039415473

ABSTRACT:
An assembly attachable to upper and lower bases of a phonograph record pressing die includes:
A. upper and lower die frames, the upper die frame attachable to the upper base, and the lower die frame attachable to the lower die base, and
B. upper and lower die faces, the upper die face attached to the upper frame, and the lower die face attached to the lower frame, the upper die face directly overlying the lower die face to press a phonograph record therebetween,
C. there being a first set of fluid passing grooves formed in at least one of the upper frame and upper face and exposed to the other thereof, and another set of heat transfer fluid grooves formed in at least one of the lower frame and lower face and exposed to the other thereof.

REFERENCES:
patent: 1307812 (1919-06-01), Errickson
patent: 1576642 (1926-03-01), Bishop
patent: 1582704 (1926-04-01), Sylvester et al.
patent: 2092880 (1937-09-01), Hunter et al.
patent: 3752620 (1973-08-01), Renoux
patent: 3830459 (1974-08-01), Strausfeld
patent: R15608 (1923-05-01), Burroughs

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