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Mixing valve

  • US 3,253,300 A
  • Filed: 01/31/1964
  • Issued: 05/31/1966
  • Est. Priority Date: 01/31/1964
  • Status: Expired due to Term
First Claim
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1. AN EXTERNAL PLASTIC MIXING VALVE FOR ATTACHMENT TO RECIEVE A PLASTIC MELT FROM AN EXTRUDER TO SUBJECT THE PLASTIC MATERIAL TO A CONTROLLED DEGREE OF MIXING AND SHEAR, COMPRISING A VALVE BODY EXTERNAL TO AN EXTRUDER AND HAVING A MEANS DEFINING AN INLET ADAPTED TO RECEIVE SUCH PLACTIC MELT FROM AN EXTRUDER FOR MIXING THEREOF, MEANS IN SAID BODY DEFINING A CAVITY IN COMMUNICATION WITH SAID INLET, MIXING VALVE MEANS IN SAID BODY INCLUDING A FIRST VALVE MEMBER RECEIVED IN CLOSING RELATION TO SAID CAVITY AND HAVING AN OUTLET PORT, A SECOND VALVE MEMBER RECEIVED IN SAID CAVITY AND DEFINING WITH SAID FIRST VALVE MEMBER OPPOSED MIXING SURFACES SPACED FROM EACH OTHER AND DEFINING A TORTUOUS CLEARANCE SPACE THEREBETWEEN OF CONTROLLED DIMENSIONS LEADING FROM SAID CAVITY TO SAID OUTLET PORT, SHAFT MEANS IN SAID BODY MOUNTING SAID SECOND VALVE MEMBER FOR ROTATION, AND MEANS ADJUSTABLY MOUNTING SAID SHAFT MEANS AXIALLY IN RELATION TO SAID FIRST VALVE MEMBER FOR REGULATING THE EFFECTIVE SPACE BETWEEN SAID VALVE MEMBERS.

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