APPARATUS FOR SUPPORTING ARTICLE IN HEATING FURNACE

摘要

The present invention relates to an improvement in an apparatus for suspending from a quartz rotary shaft, a glass article to be heat treated in a heating furnace so as to support the glass article. The improvement is comprised of a slot for receiving a cylindrical projection formed at an upper end of the glass article, which has an elliptical cross section and is formed at a lower end of the rotary shaft. A pin hole is provided for securing the glass article to the rotary shaft, which is formed on the rotary shaft along a minor axis of the slot. A clearance is provided between a peripheral surface of the slot and that of the cylindrical projection along the minor axis of the slot and is set to not more than 0.2 mm. A clearance is provided between the peripheral surface of the slot and that of the cylindrical projection along a major axis of the slot and is set to not less than 0.4 mm.