US PATENT SUBCLASS 425 / 146
.~.~ By pressure actuated valve

Current as of: June, 1999
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425 /   HD   PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS

135  DF  CONTROL MEANS RESPONSIVE TO OR ACTUATED BY MEANS SENSING OR DETECTING A CONDITION OR MATERIAL TRIGGERED {8}
145  DF  .~ Feed control of material en route to shaping area {3}
146.~.~ By pressure actuated valve

DEFINITION

Classification: 425/146

(under subclass 145) Apparatus which regulates or controls the flow of molding material by the force exerted by the material upon a closure or upon the actuating means for a closure.

SEE OR SEARCH CLASS

137, Fluid Handling,

455+, for a valve, per se, responsive to the change in condition of a flow line.

251, Valves and Valve Actuation,

12+, for valves which are fluid actuated or retarded, but not by the fluid controlled.