A professional who performs any combination of following duties to process molten glass into continuous sheet under direction of drawing-kiln operator. Respnsibilities include:

• Observes continuous sheet of glass for scratches, breaks, and other blemishes as it passes through rolls of drawing kiln.
• Wipes foreign matter from rolls and adjusts roll weights to minimize surface defects and breaks in glass.
• Moves controls to open rolls of drawing kiln when signaled by drawing-kiln operator to allow passage of stones and prevent breaks in glass.
• Opens air jets or draws metal rod across hot sheet of glass to prevent breaks from running.
• Adjusts slides on air ducts to cool glass and minimize warping.
• Clears broken glass from rolls.
• May transport cullet from work area to storage area, using handtruck.