Sumitomo Electric Industries, Limited

Katsuzou Mukai

Futoshi Mizutani

Tohru Kuwahara

A heating apparatus for drawing a glass rod having a tapered portion coupled, at its upper end, with a feed bar of an outside diameter smaller than that of the glass rod, including an apparatus housing into which the glass rod is inserted, a first sealing cover which is formed with a bore having such a dimension as to seal a clearance between the glass rod and the bore and is hermetically mounted on an inlet opening of the apparatus housing and a second sealing cover which is movably attached to the feed bar and is formed with an aperture having such a dimension as to seal a clearance between the feed bar and the aperture. The second sealing cover has a hollow portion which is formed with a space for accommodating the tapered portion and is hermetically placed, at its lower end, on the inlet opening.

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Yokohama, Japan

Katsuzou Mukai