PROCESS AND APPARATUS FOR THE PREPARATION OF SURFACE-MODIFIED GLASS RBBON

• Main Author: OHSATO N,JA
• Format: Patent
• Language: English
• Published: 26.06.1973
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

An improved process for the preparation of a surface modified glass ribbon, which comprises feeding a molten glass onto a molten metal bath, continuously directing the glass in the form of a ribbon over the molten metal bath while maintaining that in the molten metal state. Plastified, contacting the glass ribbon with a molten alloy disposed on the upper surface of the glass ribbon, said molten alloy being composed of (a) a metal surface modifier of the glass that does not melt at the temperatures of contacting the glass ribbon with the molten alloy and (b) a metal that melts at said contact treatment temperatures and that is capable of dissolving the metal (a) therein at said temperatures, and passing an electric current through the glass between the molten alloy and the molten metal bath, characterized by contacting the melt of the metal (b) or the molten alloy of the metals (a) and (b), for a previously established period of time, with an elution member maintained at a temperature approximately equal to said contact treatment temperature, of which at least the surface part is composed of the metal ( a), to thereby elute the metal (a) of the elution member and form a molten alloy having a concentration of metal (a) which becomes larger than before the elution, and feed the molten alloy onto the upper surface of the glass ribbon. (Machine-translation by Google Translate, not legally binding)