A professional who tends machine that splices uncured rubber to form inner tubes for tire. Responsibilities include:

• Positions ends of tube in machine and starts machine that butt-splices tube.
• Lifts tube to hook and places cylinders under fold at each end to prevent creasing of rubber.
• May cut tube to specified length with hot knife prior to splicing.
• May punch hole at valve location and secure valve to tube with valve-press machine.