| 摘要 |
A glass ribbon is formed from molten glass in such a manner that the molten glass is caused to overflow a supply groove in the upper part of a forming body, the molten glass is allowed to flow down along the wall surfaces on both sides of the lower part of the forming body while the flow of the molten glass is restricted by a pair of guides protruding from the wall surfaces of the forming body, the molten glass is conducted to the lowermost end of the forming body, and the streams of the molten glass flowing along the wall surfaces on both sides are merged at the lowermost end. The wall surfaces of the forming body along which the molten glass flows include: vertical wall surfaces along which the molten glass flows down in the vertical direction; and sloped wall surfaces for conducting the molten glass, which has flowed down along the vertical wall surfaces, to the lowermost end of the forming body. In the entire region in which the guides protrude from the sloped wall surfaces, the height of the pair of guides from the wall surfaces is set to be less than the thickness of the molten glass. |
