Methods of manufacture of improved linear optical conduits

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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156 86, 15624411, 15624412, 15624424, 156296, 1563042, 264230, 2642711, 2642791, 264342R, 264DIG71, 385 42, 385 52, 385 53, 385 91, 385102, 385123, 385125, B32B 3126

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RE0361577

ABSTRACT:
The present invention is directed to a heat shrink clad core optical conduit and to an optical conduit having either a thermoplastic, thermoset or liquid, light transmitting core surrounded by, preferably a fluoropolymer cladding which is in turn surrounded by a tight-fitting, finish polymer jacket which may be either transparent or translucent, and is preferably made of a polyvinyl chloride, polycarbonate, acrylic or silicone material. Numerous fillers and inserts may be used in the finish jacket polymer and the finish jacket polymer may be formed into various shapes. Bondable jacket materials may be used. The preferred method of forming the manufacturing jacket around a heat shrinkable fluoropolymer cladding is by extruding a low extrusion temperature polymer over a heat shrink clad in its expanded form into which an increased interior pressure is maintained to prevent shrinkage during the extrusion process. The preferred method of forming the finish jacket around a base clad core material is by an extrusion process where the finish jacket material is extruded over a heat shrink type fluoropolymer clad, in its expanded form, cured thermoset core thereby simultaneously shrinking the clad.

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Manufacturing Jackets Known In The Prior Art: Selected excerpts from U.S. Patent No. 5,221,387 disclosing conventional manufacturing jackets.

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