| 摘要 |
Tempering a heated glass sheet or other glass articles by moving the sheet through a body of vapor and quenching in a liquid or liquid-vapor tempering medium maintained in a container. A condenser surrounds the upper portion of the container to provide the vapor body or barrier that inhibits rapid evaporation of the tempering medium and permits ready entry and removal of the glass sheet relative to the tempering medium. Several compositions having dense vapors and a boiling point above about 110 DEG C. are suggested for the tempering medium.
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