A professional who tends machine that heats and seals precut or predesigned plastic material or film to form book covers, eyeglass cases, baby pants, tubing, and other plastic-coated products. Responsibilities include:

• Moves controls on machine to adjust temperature, pressure, and time cycle.
• Loads feeding mechanism with rolls of plastic material.
• Aligns edges of continuous plastic strips and guides them into position under electrode.
• Starts machine and depresses pedal to lower electrode that heats and seals edges of material.
• Removes product from machine and stacks it in rack or on table.
• May position plastic strip over article preparatory to heat sealing article.