Abstract: A shield conductor Wa comprises: a metallic pipe 20, a wire 10 to be inserted into the pipe 20, and a groove-like fitting member 22 provided in the pipe 20 as extending along the direction of axis of the wire 10, and at the same time, attached tightly to the circumference of the wire. With the inner surface of the groove-like fitting member 22 in the pipe 20 attached tightly to the circumference of the wire 10, the heat generated in the wire 10 is transmitted directly to the pipe 20, and then released to the air from the circumference of the pipe 20. This improves radiation performance of the shield conductor Wa.

Abstract: A shield conductor Wa comprises: a metallic pipe 20, a wire 10 to be inserted into the pipe 20, and a groove-like fitting member 22 provided in the pipe 20 as extending along the direction of axis of the wire 10, and at the same time, attached tightly to the circumference of the wire. With the inner surface of the groove-like fitting member 22 in the pipe 20 attached tightly to the circumference of the wire 10, the heat generated in the wire 10 is transmitted directly to the pipe 20, and then released to the air from the circumference of the pipe 20. This improves radiation performance of the shield conductor Wa.

Abstract: There is provided an optical fiber drawing furnace capable of drawing an optical fiber having small non circularity, which drawing furnace includes a muffle tube, in which an optical fiber preform is supplied, a heater surrounding the muffle tube, a plurality of electrode connecting portion extending from the heater, a plurality of electrodes connected to electrode connecting portions, and in conjunction therewith to an electric power source, and unifying means for unifying the temperature distribution along the circumferential direction.

Abstract: In a resin coating applicator, a holder 14 is fixed on a base 15 fitted to a drawing machine, and in the holder 14, hot water can be circulated from an inlet 18. The inner circumferential surface of the holder 14 is formed into a tapered shape so that the outer circumferential surface of a cup-like member 4 of a cartridge type coating sub-assembly 1 is fitted to the holder 14. The respective outer circumferential surfaces of a nipple 2 and a coating die 3 are cylindrical so as to be fitted to the inner circumferential surfaces of an inner cylindrical member 6, and they are positioned by a step portion. Further, they are pressed from the upper and lower sides by the bottom portion of the cup-like member 4 and a lid member 5. The lid member 5 is fastened to the cup-like member 4 integrally by a thread.