A professional who tends machine that pulls thermosetting plastics sheeting materials through preheating oven and forming frames to form sheets to specifications. Respnsibilities include:

• Turns dials on control panel to regulate specified temperatures in oven and molds.
• Moves lever to regulate tension on sheeting.
• Observes gauges to verify temperatures.
• Observes width and alignment of sheeting to ensure flanging of sides.
• Positions mold frame laterally in machine to correct alignment.
• Feels stiffness and consistency of molded sheeting to detect machinery malfunctions.
• Signals plastics-spreading-machine operator to synchronize feed of materials into molding process.
• Replaces molds in frame to conform to product specifications.
• Patches tears in film, using gummed tape.