General Electric Company

Ray Clarence Lever

Edward V Wilkus

Milton S Greenhalgh

A method of compounding thermoplastic polymeric material and fillers, including additives and agents, and unique compounded products. The compounding method comprises mixing the thermoplastic polymeric material in particulate form with particulate filler, and in progressive sequence melting the surface portion of the thermoplastic particles, blending the filler with said molten surface portion of the thermoplastic particles and removing the resultant blended melt and filler from the surface of the thermoplastic particles. The mixing and melting, and the blending and removing, are continued until the filler is substantially assimilated into the polymeric material and the thermoplastic particles become substantially diminished by melting and blending, or the method can be carried further if desired. The compounded product thus prepared is characterized by a distinctive stratified consistency.

Method of compounding thermo-plastic polymeric materials and fillers and

Method of compounding thermo-plastic polymeric materials and fillers

Compounded thermoplastic polymeric materials and fillers

An apparatus for the continuous extrusion molding of a curable polymeric material about an elongated conductor. The apparatus includes electrical induction heating means for the precise and isolated application of heat to a limited portion of a progressively advancing mass of curable polymeric material immediately prior to its continuous entry into and passage through a forming die and its molding therein to shape.

Apparatus for the manufacture of an electrical conductor covered with a

A process of increasing the output and other efficiencies and benefits in continuous extrusion manufacturing operations, including blending and plasticizing, molding to shape and curing heat curable polymeric compounds to a thermostat condition. The process comprises the continuous coincidental mixing and heating of heat curable polymeric compounds, raising the temperature thereof up to substantially the level of their curing temperatures, and the consecutive forming to shape and curing of the shaped polymeric compounds to a thermostat condition. The process is primarily carried out within an extruder or equivalent continuous forming apparatus, and any additional heat needed to achieve or accelerate the attainment of curing temperatures, or to complete the conversion to a cured thermoset condition of the polymeric compounds can be readily applied by any external source of heat. This process is especially suitable and effective in the manufacture of elongated electrical conductors or wires coated or insulated with thermosetting polymeric materials or compositions comprising the same. The invention also includes a novel apparatus for the effective and complete performance of the process.

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Fairfield, CT, United States of America

Ray Clarence Lever