US PATENT SUBCLASS 249 / 178
.~ Including means to expand or contract core

Current as of: June, 1999
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249 /   HD   STATIC MOLDS

175  DF  CORE (INTERNAL MOLD) {5}
178.~ Including means to expand or contract core {3}
179  DF  .~.~> Means bends or flexes molding face of core
180  DF  .~.~> Means simultaneously moves plural molding sections of core {1}
182  DF  .~.~> Rotary means, e.g., turnbuckle, etc.

DEFINITION

Classification: 249/178

(under subclass 175) Apparatus having means, other than a mere clamping means, which is actuated to cause the molding surface of the core to expand or contract, to move the same to or from its operative position and facilitate its removal from the molded product.

SEE OR SEARCH THIS CLASS, SUBCLASS:

150, for molding apparatus with expandable or contractable

core which is retained in position by its expansive or contractive force.

152+, for molding apparatus with core having means to expand or contract shell and/or core.