Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1972-10-20
1978-01-17
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264102, 264230, 264249, 264291, B29D 1100
Patent
active
040692809
ABSTRACT:
A method of making plastic optical fibers in which a tubular plastic sheath is heated to a predetermined temperature in a vacuum chamber, a rod-like plastic core is inserted into the sheath in the vacuum chamber and the assembly is allowed to cool in the vacuum chamber to room temperature. The internal diameter of the sheath at the predetermined temperature is greater than the outer diameter of the core at room temperature so that said core can be inserted into the tube at the predetermined temperature. The internal diameter of the sheath at room temperature is less than the outer diameter of the core at room temperature so that when said assembly is allowed to cool from the predetermined temperature to room temperature, the tube will shrink tightly onto the core.
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patent: 3438116 (1969-04-01), Stengle, Jr.
patent: 3472921 (1969-10-01), Fyfe
patent: 3560598 (1971-02-01), Neefe
patent: 3691263 (1972-09-01), Stoy et al.
patent: 3742107 (1973-06-01), Hawkins
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