Nitto Boseki Co., Ltd.

Masaaki Takita

Takeshi Watanabe

Kazuo Nishimaki

Shinsuke Shikama

Masaru Ishikawa

An apparatus for draw forming glass filaments includes a melt furnace 1 having a bottom plate 12 with a plurality of flow holes therein, each terminating in a conical nozzle tip 2. Cooling fins 10 extend outwardly from a water pipe 11 and are disposed between the rows of tips, and additional cooling is provided at least during the initial start-up period by air blown across the nozzle tips from a manifold 13 disposed opposite the water pipe. With such an arrangement the flow hole diameters may be increased, which results in an exponential increase in the molten glass flow rate and filament production rate, while still achieving smooth initial and stable continuous filament forming conditions.

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Fukushima, Japan

Masaaki Takita