A professional who operates automatic, multiunit machine to form bulbs and other glass products from tubular stock. Respnsibilities include:

• Loads glass tubes in feed mechanism and clamps collets around rods to secure and position tubular stock for molding process.
• Observes operation to determine variations from prescribed temperature levels, and turns controls, aims burners, or places and ignites auxiliary burners to adjust temperatures.
• Turns controls to regulate air pressure or vacuum processing in molds.
• Adjusts stops and guides that control indexing and positioning of glass rods in machine units to correct alignment or timing of sequence.
• Swabs molds with lubricant to prevent glass from adhering to mold walls.
• Replaces defective air and gas lines and tubes, using handtools.
• Inspects bulbs for color or transparency, size, shape, and wall thickness, using color panels, templates, and dial indicators.