Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Means forming from bulk and downstream severing means
Patent
1981-10-13
1982-12-07
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Means forming from bulk and downstream severing means
425810, B29D 1700
Patent
active
043624928
ABSTRACT:
An apparatus for molding a recorded disc includes a pair of mold plates, at least one of which is movable toward and away from the other, and adapted to form a mold cavity therebetween, a center hold forming pin slidably mounted in one of the mold plates and a center plate in the other mold plate opposite the center hole forming pin. The center hole forming pin and/or the center plate includes a removable end plate at its surface which is harder than the rest of the center hole forming pin or center plate. The harder end plate has longer wear properties and can be easily and quickly replaced when it does become worn.
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Cohen Donald S.
Flint, Jr. J. Howard
Morris Birgit E.
RCA Corporation
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