A professional who operates drawing kiln to process molten glass into continuous sheet of flat glass. Respnsibilities include:

• Sets rheostat to control speed of rolls on kiln that draw glass sheet of specified thickness, and adjusts setting to maintain thickness, based on gauge or recorder readings during processing.
• Regulates gas-firing to edges of glass sheet to prevent slippage of sheet from knurl guide wheels.
• Inspects glass sheet through kiln peephole for defects, such as stones and blisters, as sheet is drawn vertically by rolls.
• Signals balcony worker to open rolls and allow passage of defective area to prevent break in sheet.
• Receives gauge readings and positions asbestos pads on sides of cooling jacket in kiln with iron rod to correct irregular thickness in glass sheet.
• Closes lower roll of drawing kiln to prevent broken sheets of glass from collapsing into kiln.
• Lights auxiliary gas jets in kiln to heat glass sheet below break and stop run of break.
• Replaces jacket cooling pads and plugs in kiln with mortar, using trowel.