Copper wires used for transmitting sounds or images

Details Copper wires used for transmitting sounds or images Copper wires used for transmitting sounds or images

1987-07-30

1988-12-20

Roy, Upendra

Metal treatment

Stock

Directionally solidified

148432, 420469, 420497, 420500, C22C 900, C22F 108

Patent

active

047923695

ABSTRACT:
The present invention relates to a copper wire for use in sound or image reproducing systems, such as audio, video and television systems, etc., and a method for manufacturing the same. The copper wire consists of high purity copper in which silver and sulfur contents are both not more than 0.5 ppm and preferably has a crystal grain size not less than 0.02 mm and is unidirectionally solidified or single crystallized. Such a copper wire is manufactured by continuously casting electrodeposited copper which has been obtained by refining by re-electrolysis of electrolytic copper, using a specially arranged casting apparatus having a mold projecting to an electrolytic bath.

REFERENCES:
patent: 3716423 (1973-02-01), Cofer
patent: 4311522 (1982-01-01), Batra et al.
patent: 4400351 (1983-08-01), Komori et al.
patent: 4474614 (1984-10-01), Arentzen
patent: 4582545 (1986-04-01), Kamada et al.
Pitt et al., Met, Tras. AIME, vol. 10A, Jul. 1979, p. 809.

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