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US 5,156,715 AGranted
Apparatus for applying two layers of plastic to a conductor
AssigneeSouthwire Company
InventorRalph E. Starnes, Jr.
Life of this patent
Estimating the term…
Abstract
A method of and apparatus for simultaneously extruding a coating comprising a plurality of layers of dissimilar plastic compounds having substantially different melting points onto a moving electrical conductor wherein the plastic compounds are mechanically and thermally separated and the conductor is centered in the plastic jackets by a center trim guide, said trim guide having replacable guide tips. Separating the two plastics prevents thermal degradation of the two extrudates by causing their melt temperatures to remain substantially constant.
Claims9
Apparatus for applying two layers of plastic to a conductor comprising:
- a crosshead through which said conductor passes, said crosshead having first means for applying one of said layers of plastic to said conductor and second means for applying the other of said layers of plastic to said one layer of plastic;
- and
- heat conducting means disposed in conductive heat transfer relationship with said first and second applying means for diverting heat generated at one of said first and second applying means away from the other of said first and second applying means by conduction, said heat conducting means comprising an annular ring having first and second annular faces disposed substantially parallel to one another, said first annular face being in conductive heat transfer relationship with said first applying means and said second annular face being in conductive heat transfer relationship with said second applying means.
Dependencies are inferred from the claim text.