Method of forming thin sheet glass by float process

Abstract From the Canadian patent

In a method of forming a thin sheet glass by the float process, a thin layer of molten glass is formed by making molten glass flow through a sluice formed on the surface of a molten metal bath, and the glass layer is drawn lengthways of the bath to further reduce its thickness and advance while its upper surface is exposed to a cooled atmosphere. The sluice is a vertically narrow gap between the surface of the molten metal and a lower end face of a wall extending above and transversely of the molten metal bath. By ingeniously shaping a lower end portion of this wall and avoiding particularly heating the molten glass in the vicinity of the sluice, it has become possible to obtain defectless …