US PATENT SUBCLASS 164 / 381
.~.~.~ Mechanically retractable

Current as of: June, 1999
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164 /   HD   METAL FOUNDING

374  DF  FLASK OR FLASK SECTION {5}
379  DF  .~ Including means to retain or reinforce mold sand or to position reinforcement {3}
380  DF  .~.~ Sand strip {1}
381.~.~.~ Mechanically retractable

DEFINITION

Classification: 164/381

(under subclass 380) Apparatus wherein the sand strip is removable from the flask by a structural element actuating the strip.